申華民國品質學會 · web viewdr. ishikawa believed that quality improvement initiatives must...
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CEC-CQS課程內容(ANQ-CQS Book of Knowledge)
Module 1- Quality Methodology & Application1.1The Quality Guru have made a significant impact on the world through their
contributions to improving not only businesses, but all organizations including state and national governments, military organizations, educational institutions, healthcare organizations, and many other establishments and organizations.
1.1.1Dr. W. Edwards Deming (1900–1993)
Background
Deming had taught quality and productivity improvement for more than fifty years. His
Fourteen Points, System of Profound Knowledge, and teachings on statistical control and
process variability are studied by people all over the world. His books include: Out of the
Crisis (1986), The New Economics (1993), and Statistical Adjustment of Data (1943)
……….ContributionDeming's philosophy in his famous fourteen points ………….It serves as a framework for quality and productivity improvement. His Fourteen Points, System of Profound Knowledge, and teachings on statistical control and process variability
Deming Cycle - Plan-Do-Check-Act (PDCA) Cycle1. Plan a change or test (P).2. Do it (D). Carry out the change or test, preferably on a small scale.3. Check it (C). Observe the effects of the change or test. Study it (S).4. Act on what was learned (A).5. Repeat Step 1, with new knowledge.6. Repeat Step 2, and onward. Continuously evaluate and improve……..
1.1.2 Dr. Kaoru Ishikawa (1915–1989)
BackgroundA professor of engineering at the University of Tokyo and a student of Dr. W. Edwards Deming, Ishikawa was active in the quality movement in Japan, and was a member of the Union of Japanese Scientists and Engineers. He was awarded the Deming Prize, the Nihon Keizai Press Prize, and the Industrial Standardization Prize for his writings on quality control, and the Grant Award from the American Society for Quality Control for his educational program on quality control……Contribution
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Dr. Ishikawa is the Father of the Quality Circle movement and creator of the best known Cause and Effect diagram/ Fishbone diagram.Dr. Ishikawa believed that quality improvement initiatives must be organization-wide in order to be successful and sustainable over the long term. He promoted the use of Quality Circles to: (1) Support improvement; (2) Respect human relations in the workplace; (3) Increase job satisfaction; and (4) More fully recognize employee capabilities and utilize their ideas………
1.1.3 Shigeo Shingo (1919–1990)
Background
One of the world's leading experts on improving the manufacturing process, Shigeo Shingo
created, with Taiichi Ohno, many of the features of just-in-time (JIT) manufacturing
methods, systems, and processes, which constitute the Toyota Production System,
Revolution in Manufacturing……
Contribution
Specific concepts attributed to Shingo are:
Poka Yoke requires stopping processes as soon as a defect occurs, identifying the
source of the defect, and preventing it from happening again…
SMED (Single Minute Exchange of Die) is a system for quick changeovers between
products. The intent is to simplify materials, machinery, processes and skills in order to
dramatically reduce changeover times from hours to minutes…
Just-in-Time (JIT) Production is about supplying customers with what they want when
they want it. The aim of JIT is to minimize inventories by producing only what is required
when it is required. …...1.1.4 Dr. Walter A. Shewhart, (1891–1967)
Background
A statistician who worked at Western Electric, Bell Laboratories used statistics to
explain process variability……..
ContributionDr. W. Edward Deming who publicized the usefulness of control charts, as well as the Shewhart Cycle, rightfully credited Shewhart with the development of theories of process control, as well as the Shewhart transformation process on which the Deming PDCA (Plan-Do-Check or Study-Act) Cycle is based…...
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1.1.5 Dr. Joseph Juran (1904-)BackgroundDr. Juran's teaching and consulting career spanned more than seventy years, known as one of the foremost experts on quality in the world.A quality professional from the beginning of his career, Juran joined the inspection branch of the Hawthorne Co. of Western Electric (a Bell manufacturing company) in 1924, after completing his B.S. in Electrical Engineering. In 1934, he became a quality manager. He worked with the U. S. government during World War II and afterward became a quality consultant. …….ContributionDr. Juran's philosophy on Quality Trilogy and the Quality Planning roadmap can be used to establish a traditional quality system, as well as to support Strategic Quality Management. Dr. Juran conceptualized the Pareto principle, which millions of managers rely on to help separate the "vital few" from the "useful many" in their activities. This is commonly referred to as the 20-80 principle……
1.1.6 Philip Crosby (1926–2001)BackgroundIn 1957 he became a senior quality engineer with Martin Marietta Co. in Orlando, Florida. During his eight years with Martin Marietta, Crosby developed his "Zero Defects" concepts, began writing articles for various journals, and started his speaking career…………In 1965 International Telephone and Telegraph (ITT) hired Crosby as vice president in charge of corporate quality. During his fourteen years with ITT, Crosby worked with many of the world's largest industrial and service companies, implementing his pragmatic management philosophy, and found that it worked……ContributionCrosby's cost of quality. “Quality is free” makes the point that it costs money to achieve quality, but it costs more money when quality is not achieved. When an organization designs and builds an item right the first time (or provides a service without errors), quality is free. It does not cost anything above what would have already been spent. When an organization has to rework or scrap an item because of poor quality, it costs more.
1.1.7 Outline of QM
Fundamental concepts: Quality, Management
Management systems: Leadership, Vision, Strategy, Daily Management, Policy
Management, Quality Assurance, Cost, Delivery & volume, Environment, Safety &
Health, Human Resource, Information, Knowledge and Technology, Equipment, etc.
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Tools and techniques: Scientific problem solving approach, statistical methods, QC seven
tools, New QC seven tools, QFD, FMEA, FTA, DR, OR, VE/VA. IE techniques, etc.
Implementation: Introduction and promotion of quality management, Activation of the
organization and people, Mutual enhancement with other organizations
1.2 Company -Wide Quality Control Concepts1.2.1 What is Quality?
Concepts of quality from different perspective - Quality means user satisfaction, life
cycle stages -"Next process is our customer", internal customer, process owner etc
Quality of design Vs quality of conformance
Statistical quality control and company-wide quality control
Operation Standards/ Standard Operations Procedure
1.2.2Qualities is not achieved by inspection
Control by facts; “Facts” convince “Opinion” confuse
Quality evolution –Inspection to quality control , quality assurance and quality system
1.2.3 Human aspects of quality control
Enhance of operation workers consciousness
Motivation
Marlow’s hierarchy of needs
Good “5S” housekeeping
- Origin of “5 S”
- What are “5 S” and its practical applications on shop floor?
SEIRI (Sort)
- Sort out unnecessary items and discard them.
SEITON (Straighten)
- Arrange the rest in good order for use.
SEISO (Shine)
- Clean up the workplace and facilities thoroughly
SEIKETSU (Standardize)
- Keep neat and clean/prevent dirty working environment
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SHITSUKE (Sustain)
- Maintain a high level of discipline/work ethics.
Company-wide suggestion scheme & Quality Control Circle activities
1.2.4 Customer Focus
Customer satisfaction: Significance of customer focus, Its justification, A principle of
business transaction (prioritizing recipient satisfaction)
Market-in concept vs. Product-out concept
Who are the customers?: Variety of customers, Social quality, CSR, Corporate governance
Next processes are our customers: Its meaning and significance, Internal customers, Process
owner
1.2.5 Realization of quality (Prof. Iizuka, 2.3)
Quality assurance: Concept, development, system, organization, implementation (See 6)
Quality Improvement: Significance of “improvement” in management
1.2.6 Aspects of quality (Prof. Iizuka, 2.4)
Quality of plan and implementation: Its meaning and significance, Quality of design &
quality of conformance
Must-be quality (Expected quality) and Attractive quality (Exciting quality): Pluralistic
aspects of quality, Change in perception on quality
Quality of job: Quality of products/services, Quality of work, Quality of process, Expansion
of application of QM1.3 Quality Information Systems
1.3.1 An overview of ISO standards (ISO 9001 QMS, ISO 14001 EMS & ISO 18001
OHSAS)
1.3.2 How does a quality information system work?
Describe the working process
1.3.3 Planning for quality information system
Design for continuous use
Provide report & output requirements with generated report format
1.3.4 Consideration of establishing a computerised quality information system
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1.4 Fundamental Concept on Management
1.4.1 Management
Management: Definition and significance of “management”
PDCA: Management cycle, its detailed meaning
1.4.2 Control
Variation: Control of variation and abnormalities, Control of factors and causes, Analysis of
cause-and-result relations, Standardization
Process control: Its definition, significance and methods
Standardization: Its definition and significance (saving thinking, knowledge reuse, basis of
improvement, basis for originality, sharing best practices) 1.4.3 Purpose oriented
Total optimization: Purpose oriented, variety of objectives, balance of objectives
Prioritization: Law of Pareto, “Vital few, trivial many”, Selection and concentration1.4.4 Facts
Management by fact: Scientific approach, Latent facts (latent market claims, visualization),
Analysis of data, Significance of SQC (Statistical Quality Control)1.4.5 Actions
Immediate remedy, recurrence prevention, predictive actions: Variety of PDCA cycles,
Variety of causes (direct, indirect, induced, local, background, controllable, …), Causes of
occurrence and overlook, Scope of actions (removal of symptoms and causes), Prediction
and prevention1.4.6 Improvement (See 5)
Continual improvement, Significance of improvement, Leaning, Method of improvement,
problem solving, Innovation1.4.7 Respect for people
Development of human resource ability
Self-management
Involvement of all people
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People centred management: Resect for humanity, support for self-realization,
consideration to weakness of people, win-win relations between organization and
individuals, etc.
1.5 Inspection methods
1.5.1 Inspection decision- Compliance & Non compliance
What is Compliance?
What is Non Compliance?
1.5.2 Types of inspection- Repeatability checks, Accuracy inspection, Product auditing &
Discovery sampling
What are Repeatability checks?
What is Accuracy inspection?
What is Product auditing?
What is Discovery sampling?
1.5.3 Inspection planning
Inspection activities and locations
Selecting quality characteristics
Inspection instructions
Inspector selection
Documentation
1.5.4The amount of inspection
Sampling: Attribute & Variable
- Meaning o Attribute
- Meaning of Variable
Corrective action
Automated inspection
1.5.5 Seriousness of classification
Critical, major and minor
1.5.6 Inspection errors: Known /Unknown errors
1.6 Quality Audit
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Types of quality audit ( 1st party, 2nd party & 3rd party)
What is an audit?
Audit-who are involved?
Audit objectives
Initiation of an audit with audit checklist
Review documentation/system audit
Phases of an Audit Program
1.6.1 Preparation & Planning
Audit Team Selection,
Audit Schedule,
Audit Plan and Audit Checklist,
Preliminary Visit & Audit Team Orientation,
1.6.2 Performing an Audit
Opening Meeting,
Typical life phases of a Product Audit,
Auditing
Gathering Objectives of Audit,
Review of documentation,
System audit
1.6.3Reporting the Audit results
Non conformities and areas for improvement
Observations & Questioning Techniques,
Statistical method & methodology on auditing
Summary of audit findings
1.6.4 Debriefing Audited
Follow-up Corrective & Preventive actions
Closed meeting
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Module 2- Quality Management — Conceptual Model and Implementation
2.1. Policy Management — Conceptual model and implementation
2.1.1. Set up the Mission, Value, Vision, and Strategies
Mission states that why the organization exists, and what the organization contributes to
the society, the country, or the world.
Value states that what is important to the organization, or what the organization believes
in.
Vision states that what the organization likes to accomplish or where it would like to be
sometime in the future. Usually it is a great goal that the organization wants to approach.
Strategies are the action plans which to be implemented to attach the goals or the
objectives.
The relationships among the mission, value, vision, and strategies are as follows: (See
Figure 1.)
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Figure 1: The relationships of Mission, Value, Vision, and Strategies
2.1.2 Environment analysis and SWOT analysis
Environment analysis
a. Internal environment -
customer segment,
products,
markets,
techniques, knowledge,
quality, costs,
management system,
organization culture,
especially to those items that can be used to compare with competitors.
b. Industrial environment -
Mission Value
Vision
SWOT analysis Strategy thinking
Deployment of objectives and strategies
KPIs Action plans
Measurement system
Implementation Review and action
Annual review and discussion
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analysis of competitors
industrial structure
market share
the development of products, techniques, and materials.
c. Economic environment -
domestic economy,
worldwide economy,
the government’s economic policy,
the state of the economy.
d. Society environment -
society structure,
education policy,
political environment
the government’s labor policy,
SWOT analysis
a. Strength: the company possesses some critical success factors that are with
competitive advantage compare to their competitors.
b. Weakness: the company is deficient in some techniques, management, and
competitive factors.
c. Opportunity: the good opportunities come from the external environment for the
future development.
d. Threat: the bad situations caused by the external environment that will be the
obstacles to develop in the future.
2.1.3 The development of objectives and strategies
Develop the long-term objectives and strategies, and the annual objectives and
strategies based on the environment analysis and SWOT analysis. When a
company talks about the strategies, their effectiveness and feasibility must be
considered, since the goal of the strategies is to attach the objectives, see Figure 2.
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Figure 2: The development of objectives and strategies based on SWOT analysis.
Deploy the annual objectives and strategies top down following the organization
structure, see Figure 3.
Figure 3: Deploy the annual objectives and strategies.
2.1.4 The implementation of strategies
In order to attach the objectives, it is needed thoroughly implement the strategies.
Thus, we need to transfer the strategies into the action plans.
Develop the implementation plan
General Manager
Objective
Measurement
Objective Strategy
Measurement
Objective
Divisional Manager
Departmental or Functional Manager
Strategy
Strategy
Measurement
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The implementation plans of the strategies consist of the action items, the time
schedule, the related performance indicators and targets, and the responsibilities.
Table 1: Example of implementation plan
Strategy Action item Performance indicator and target
Responsibility
Raise the process capability
Improve step d The standard time: 1.2 minutes
Lee Yu-Kon
Implement autonomous inspection
Failure rate reduce to 0.005
Wong Pi-Hon
The execution of the implementation plan
The responsible department or team should act according to the implementation plan. The
managers and the supervisors should control the time schedule and the implementation status quo
based on the teamwork.
The review of the implementation
In order to assure the expected results of the implementation plan (and the related strategies),
the firms need to review the performance of the implementation of the strategies and attachment
of the objectives monthly during the implementation period. If the results of the
implementation of the strategies and their related objectives are not satisfactory, then the
firms need to take the improvement or re-actions to raise the results. It is emphasized that
the firms need to go through the cycle of “plan–do–check–act” (PDCA) continuously
(Kondo, 1998). The key activities are as follow:
a. Monthly review the implementation levels and the related performances of the
strategies.
b. The review of the attached results of the objectives on monthly basis.
c. The improvement of the problems and taking re-actions as the results of the
implementation of the strategies or the attachment of the objectives is not as expected.
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d. The final annual review and plan for the next year.
2.1.5 The frameworks of the strategy management and Hoshin management.
The frameworks of the strategy management
Strategic-management paradigm is based on sequential steps in the strategy-
development process—such as vision development, environment analyses, SWOT
analysis, formulations of objectives and goals, strategy building, implementation, review,
and control (Andersen, 2000). The main steps of the strategic-management system are:
a. develop a mission and vision;
b. conduct an environmental analysis and SWOT analysis;
c. identify the organization’s objectives;
d. conceive the strategies to achieve the related objectives;
e. develop budgets and allocate the resources to the strategies;
f. deploy the strategies into implementation programs and action plans;
g. implement the action plans;
h .review the schedule of the action plans and evaluate the performance of the
objectives; and
i. make corrective adjustments to ineffective programs.
An implementation model for such a system is shown in Figure 4.
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Figure 4: Implementation model of strategic management
The frameworks of the Hoshin management
The practices of Hoshin management are as follows (Yang, 1995; Bechtell, 1996; Kondo,
1998; Lee & Dale, 1998):
a. check the organization’s principles and set up a quality policy;
b. develop the vision and direction (Hoshin);
c. identify the long-term and mid-term objectives;
d. determine the priorities and conceive the strategies;
e. drive the annual objectives and develop the annual plans;
f. allocate the resources and develop a budget to support the department’s objectives and plans;
g. conduct a ‘catch-ball’ deployment, and convert mandatory objectives and strategies set by
senior management into employees’ own self-set-targets;
h. form departmental objectives and action plans;
i. execute an action plan through daily management and self-audits;
j. review progress, including evaluation, investigation, and results; and
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k. undertake an annual review, including performance evaluation, problem analysis, and future
plans.
An implementation model for Hoshin management (developed by Yang, 1995), is presented
in Figure 5.
Figure 5: Implementation model of Hoshin management
2.2 Daily Management — Concept and Implementation
The aim of daily management is to raise the performance, including efficiency and
effectiveness, of the daily works. Thus, the daily management focuses on the following
contents:
2.2.1 Job description and daily performance management
Job analysis and job description
Usually, job analysis is a process for determining the main components of a job,
including tasks, activities, characteristics, services, operations, and procedure. As a result
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of a job analysis, we can obtain the job description, which covers the tasks (and activities)
carried out and the knowledge, skills, abilities, behavior, and the duties required of a
particular job. Thus, job description summarizes the job duties, needed knowledge, skills,
abilities, experience, and working conditions for a particular job.
--Knowledge involves to having sufficient information and know how to perform the job.
--Skills refer to the required methods, techniques, and attributes that are acquired to do the
works satisfactory.
--Abilities includes to having the required skills, intellects, and emotional and
psychological attitudes to perform the works.
--Experience refers to having the required knowledge, well skills and abilities, which are
experienced from doing the similar works for a long time before.
The features of job (daily work)
A job or daily work is usually with the following features:
a. high degree of specialization,
b. high degree of specification,
c. involves a narrow range of tasks and operations,
d. a high degree of repetition,
e. limited procedures and methods,
f. less training time for the employees.
Job description and performance management
Usually, any organization will pursue the efficiency and quality of the job doing with
using lower resources, based on the performance management of the daily management.
The job descriptions are the fundamental prerequisite of a performance management
system since they provide the criteria that can be used in measuring the performance of
the daily management. Since if without a job description, it is difficult to understand what
are the job results and the required duties for a particular job. As a result, the employees
don’t know how to fulfill the job, and the organization doesn’t know what are to be
evaluated for the employees.
We can presume that:
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Performance = efficiency + quality.
For example, a quality supervisor specializing in process quality control can quickly find
out the quality problems and make the corrections or improvements to solve the problems
thoroughly.
2.2.2 Work breakdown and standardization
Work breakdown structure (WBS) is a useful tool for the job description. WBS is
statement of all activities (or works) to be completed in a particular job. We state the steps of
WBS as follows:
Identify the all tasks that constitute the specific job position.
Analyze the hierarchies and relationships of the works.
Develop the implementation process of the job based on the hierarchies and relationships
of the works, see Figure 6.
The simplification and rationalization of the developed process to attach the ‘lean
process’.
Estimate the standard time for each work.
Identify the inputs, outputs, and customers of the process.
Declare the accountabilities and responsibilities related to each work.
Document the process; finish the standardization of the process (SOP).
2.2.3 The implementation of daily management
For any organization, it is needed to assign the suitable employees to be accountable
on their tasks, and to request the employees to implement the jobs sufficiently and
effectively. In order to pursue the performance of the daily management, there are some
actions to be taken by the organization or the responsible employees as follows:
Set up the control system for daily works
Arrange the work instruction and skill training for the new employees or those in the new
position
Adopt the employee development and education, and the job rotation.
Realize the visual control and management in order to clean up everything, and the firm
can see problems and solve these problems.
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Gather and analyze the daily management information, and find out the problems
encounter on the workshop.
To solve the problem timely, and then revise the SOP if necessary.
2.2.4 The daily performance management
In order to pursue the sufficiency, effectiveness, and quality of the daily management,
the organization needs to develop and implement the performance management system
which is focused on the process (See Figure 6).
Solve the problem
Inventory
Start the production
Sampling
Final inspection
Control chart renew
Quality check
Quality reports
Process capability analysis
Control system
Adjust the operations NG
Production on goingN
Check the first piece
production on going
Y
Confirm the specification
Y
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Figure 6: The process of quality supervisor’s job.
Set up the daily performance indicatorsConsider the criteria of the job operation, which are as follows:
QualityQuantityCost-effectivenessTimelinessCustomer perceptionEtc.
Based on these criteria, we can develop the daily performance indicators, see the following
Table 2.Table 2: Examples of daily performance indicators
Performance indicator
Target Measurement Actual result
Defect rate 0.2% Defect number /production number
0,16%
Re-work rate 3% Re-work number /production number
4,5%
Cycle time 5 minutes The greatest time of the steps on the process
4.5 minutes
Capacity 230 pieces /per day
Production number per day
250 pieces /per day
a. Audit and manage the daily performance
The supervisor needs to gather the actual data from the workshop, and check the result
on daily basis. It is needed to compare the actual result with the target of the performance
indicator. When some indicators’ target does not be attached, the supervisor and the
responsible employees need to analyze the causes, and solve the problems immediately.
b. Evaluate the performance
Based on the actual results of the performance indicators, the organization can
evaluate the following performances.
- Personal performance,
- Team performance,
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- Cross-functional performance.
2.2.5. Process management and improvement
The performance of daily management is dependent on the process operation, thus, we
need to realize the implementation of SOP. Furthermore, it is needed to take some
improvement methods to simplify the process, and the ideal aim is to attach the ‘lean
process’. Here we introduce some improvement methods, which are popularly adopted by
the industries.
a. QIT
Solve the quality problems by organizing a temporary team.
b. QCC
Quality control cycle (QCC) is initiated in Japan, 1961, which is performed by a
formal small group (the member number from 4 to 12). The group improves the quality
problems through a stringent procedure with about 10 steps, and uses several QC tools
and IE improvement tools.
c. Improvement by project management
When the problem is critical, and it’s related to several departments or outside
organizations, the firm shall organize a project team to solve the problem.
d. Six-Sigma (GE-6σ)
Six-Sigma improvement method is initiated by Motorola in 1987, GE adopted it in
1995, and its initial aim is to improve the process quality to 6σ quality level. It uses the
process of DMAIC (Define, Measure, Analyze, Improve, Control) and some advanced
statistical tools to improve the quality problems.
e. Project management
If a problem is related to several units, it is a cross-functional issue, and then the
organization will organize a project team to solve the problem.
2.2.6. The integration of performance management with reward systems
The organization want to implement daily management effectively, it is needed to
adopt the performance management. Besides, the organization also need offer the valuable
incentives to the employees, who have good performance of their job doing. Thus, the
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integration of daily performance management with reward system is very critical for the
employees’ incentive and promotion.
Module 3 – Metrology and Reliability
3.1 Metrology Measurement
3.1.1 What is Metrology
Background
History
- James Watt invented screw micrometer.
- Treaty of Metric System in 1875.
3.1.2 Metrology Measurement
Meaning of Metro and Logy
Names of International Committees
- Mention CIPM, MNI
Common terms such as measurement, accuracy, uncertainty, precision, resolution
- Mention the meaning of them
3.1.3 Foundation of SI Systems
Seven basic units of SI systems
- Length, mass, time, electric current, thermodynamic, candela and mole
Common instruments and accuracy
- Vernier calipers and screw micrometer
Linear Measurement
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Units of measurement
3.1.4 Measurement Errors
Parallel errors
- Caused by apparent shifting of alignment when shifting of positions.
- How to correct such error
3.1.5 Surface Characteristics
Conditions of surface
Roughness
Waviness
Lay
Flaws
3.1.6 Methods Used To Study Surface Texture
Optical Method
- By microscope to examine the surface concerned
Tactical Method
- Comparing a surface with a standard specimen
Measurement Instrument
- Contact Type – A stylus head is passed across the lay of the surface
- Non-contactable Type – By measuring the intensity of the light rays which scanned
across the work place
3.1.7 Symbols Used
a – Roughness value, Ra in a micrometer
b – Production Method such as coating or treating
c – Sampling length
d – Direction of lay
e – Machine allowance
f – Other roughness value
3.1.8 Surface Measurement Terminology
Real Surface
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Real Profile
Effective Surface (Measured)
Irregularities
Spacing
Lay
Sampling Length
Reference Line
3.1.9 Study of Dynamic Force (Country Specific in Red)
Types of forces
- Balanced Force, Net Force, Fractional Force
Fractional force
- The force opposing a motion
- How to calculate it
Coefficient of fraction
- The ratio of frictional force to the mass is called Coefficient of Friction
- How to calculate it
Law of fraction
- The frictional force between two surfaces opposes their relative motion
- The frictional force is independent of the area of contact of the given surface when the
normal reaction is constant
- The limiting force is proportional to the normal reaction for the case of static friction
New Law of Motion
- Everybody continues in its state of rest or uniform motion in a straight line unless
impressed forces act upon it. (Newton’s First Law)
- The change of momentum per unit time is proportional to the impressed force and
takes place in the direction of the straight line along with the force acts. (Newton’s
Second Law)
Composition of forces
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- If 2 forces P and Q are represented by the adjacent sides P and Q of a parallelogram.
The 2 forces can be represented by the diagonal of the parallelogram which is the
resultant force, R, which has the same effect of the other 2 force
3.1.10 Principles of Thermometry
Temperature
Temperature scales
- What is Centigrade scale?
‧Ice point is assigned a value of 00C
‧Steam point is assigned a value of 1000C
- What is Kelvin scale
‧Designed by Lord Kelvin based on the efficiency heat engine
‧Its zero is the absolute 0
Liquid glass thermometers
Differences between mercury and alcohol thermometers
- List all the differences
Thermocouple
3.1.11 Study of Energy, Work and Power
Types of energy such as Potential Energy and Kinetic Energy
- What is Potential Energy?
‧Gravitational potential energy is the energy which a body possess because of its
position relative to the ground
- What is Kinetic Energy?
‧Kinetic Energy (KE) is the energy a body possesses due to its motion
Meaning of Work and Power
3.1.12 Study of Sinking and Floating
Meaning of Specific Gravity
Density of common substance
- What is Potential Energy?
‧Aluminum – 2,700 kg m-3or 2.7 g cm-3
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‧ Copper – 8,920 or 8.92
‧ Mercury – 13,600 or 13.6
‧ Water at 40 C – 1,000 or 1.0
‧ Oxygen – 1.43 or 0.00143
3.1.13 Principles of Electrostatic
What is electric charge?
Conductors and insulators
Electricity
Electromagnetic force
Measuring electric current
Resistance
What is Ohm’s Law?
- The law states that current, I, passing through a conductor is directly proportional to the
potential difference, V, between its ends, provided that the temperature remains constan
3.2 Reliability and Maintainability
3.2.1 History of Reliability
Beginning of Reliability
3.2.2 Definition of Reliability
Based on probability, time, performance and conditions of usage
3.2.3 Inherent Reliability
The highest reliability
3.2.4 Measurement of Reliability
MTTF and MTBF
Failure Rate
- Mean of measuring reliability
Calculation of MTBF
3.2.5 Bath Tub Curve
Early Failure
Constant Failure
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Wearout Failure
3.2.6 Concept of Reliability
Reliability Activity Cycle
- Determination of reliability requirements
- Develop the reliability program to meet the requirements
- Evaluation of Reliability Plans at appropriate points
- Reliability growth, control and maintenance
Infant Mortality Period
- Weak components start to cause failure
Useful Life Period
- Lowest number of failures
Wear out Period
- Failures start to increase rapidly as more “wear out” occurs
3.2.7 Reliability Prediction
Components in Serie
Calculation of component in series
Components in Parallel
Calculation of component in parallel
Calculation of components in series and parallel
3.2.8 Failure Mode and Effect Analysis
Basic principle of FMEA
Application
Benefits of FMEA
3.2.9 Techniques for Achieving Higher Reliability
Use and procurement of parts of higher reliability
Redundancy
- An effective and simple way to reduce failure rates is by using redundancy
Parts Derating
- When parts are run at their maximum capability, they wear-out much faster
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Burning-In
- The importance of sufficiently burning-in parts is to weed out the early failure
Stress Testing
3.2.10 Concept of Availability
What is MTTR
- How to calculate it
Meaning of Availability
- The probability that a product when called upon will carry out its intended functions,
under the stated conditions
Calculation of Availability
- Show examples
3.2.11 Reliability Testing
Type I Censor
- Type I Censoring : Test Terminated Upon Occurrence of Pre-assigned Time
- How to calculate it
Type II Censor
- Type II Censoring : Test Terminated Upon Occurrence of Pre-assigned Failures
- How to calculate it
Sequential Test
- Accumulated results of the test at any point serves as a criterion for making one of the
following possible decision
‧ Accept the equipment
‧ Reject the equipment
‧Continue testing
- How to use it
Parameters in Sequential Test
‧Producer’s risk
‧Consumer’s risk
‧Design MTBF
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‧Minimum MTBF
3.2.12 Maintainability
It is the degree to which a product can be maintained/restored to perform its intended
functions, both economically and in the shortest possible time frames
Its relationship with Reliability
Difference between Reliability and Maintainability
- List the difference
Module 4- Quality Tools and Techniques
4.1 Basics of Statistical Thinking
4.1.1 Type of data
Variables: definition, example
Attributes: definition, example
4.1.2 Population and sample
Concept of population and sample
Infinite population: definition
Finite population: definition
4.1.3 Sampling and error
Concept of random sampling
Sampling error, sampling precision
4.1.4 Concept of location and dispersion
Measures for location
Measures for dispersion
Other measures for distribution
4.1.5 Mean and range (can be included in 4.1.7)
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4.1.6 Outlier
Concept of outlier
How to find outliers
Influence of outliers
4.1.7 Basic statistics and their calculations
Mean
Median
Sum of squares
Variance
Standard deviation
Coefficient of variation
4.1.8 Process capability index
Concept of process capability index
Cp and Cpk: definition and calculation
4.1.9 Sampling methods
Simple random sampling
Systematic sampling
Stratified sampling
Cluster sampling
Estimation of population mean: expectation and standard deviation
4.2 QC Seven Tools (Seven Basic Tools of Quality) and their application
4.2.1 Pareto chart
Objective of Pareto chart
Pareto's Principle: vital few, trivial many
How to draw Pareto chart
How to interpret Pareto chart
4.2.2 Ishikawa diagram (cause-and-effect diagram)
Objective of Ishikawa diagram
How to draw Ishikawa diagram
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How to interpret Ishikawa diagram
4.2.3 Check sheet
Objective of check sheet
How to design/use check sheets
4.2.4 Histogram
Objective of histogram
How to draw histogram: how to set interval
How to interpret histogram: type of shape (normally distributed, plateau, skewed, etc.)
4.2.5 Scatter diagram
Objective of scatter diagram
How to draw scatter diagram
How to interpret scatter diagram
Correlation coefficient: positive correlation, negative correlation
4.2.6 Graphs
Type of graphs and how to use them
Bar chart, pie chart, line char, band chart, radar chart
4.2.7 Control charts
Basic idea of Shewhart control charts
Random causes and assignable cases
Three sigma rule
Stable process, in-control and out-of-control
Phase I control charts, phase II control charts
X bar - R control charts:
- How to draw X bar - R control charts
- How to read X bar - R control charts, out-of-control criteria
Control charts for variables
- X, X bar, X median, R, s, Rs charts
Control charts for attributes
- np, p, c, u charts
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Statistical process control (SPC)
Basic ideas behind SPC
Process capability index
Process performance index
4.2.8 Stratification
Concept of stratification
4.3 New QC Seven Tools (Seven New Quality Tools, Seven Management and Planning Tools)
4.3.1 Affinity Diagram
Objective of affinity diagrams
How to draw affinity diagrams
KJ method
4.3.2 Interrelationship Diagram
Objective of interrelationship diagrams
How to draw interrelationship diagrams
4.3.3 Tree Diagram
Objective of tree diagrams
How to draw tree diagrams
4.3.4 Matrix Diagram
Objective of matrix diagrams
How to draw matrix diagrams
Quality function deployment
Types: L, T, Y, X, C
4.3.5 Matrix Data Analysis
Objective of matrix data analysis
Principal component analysis
4.3.6 Arrow Diagram (Activity Network Diagram, PERT)
Objective of arrow diagrams
How to draw arrow diagrams
4.3.7 Process Decision Program Chart (PDPC)
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Objective of PDPC
How to draw PDPC
4.3.8 Prioritization Matrix
Objective of prioritization matrix
How to draw prioritization matrix
4.4 Probability Distribution in Quality Management
4.4.1 Basics of probability distributions
Distribution function
Probability density function
Probability mass function
4.4.2 Type of distribution
Continuous distributions: normal, uniform, exponential, Gamma
Discrete distributions: binomial, Poisson, uniform
4.4.3 Additivity of variance
Expectations and their properties
Correlation coefficient
(Statistical) independence
Additivity of variance
4.4.4 Calculating probability (of distributions)
Percentile
Reading normal distribution probability tables
4.5 Statistical Inference in Quality Management
4.5.1 Statistical hypothesis test
Population, sampling, sample, test statistic
Hypotheses: null hypothesis, alternative hypothesis
One-sided test, two-sided test
Significance level, error of the first kind
Power, error of the second kind
4.5.2 Statistical estimation
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Estimator, estimate
Unbiased estimator
Confidence interval
4.5.3 Procedure of test and estimation
For location of one population
For dispersion of one population
For difference of locations between two populations
- Variances known
- Variances unknown but identical
- Variances unknown and not identical
For ratio of dispersions between two populations
4.5.4 Interpreting test and estimating results
4.6 Correlation Analysis and Regression Analysis
4.6.1 Basics of correlation analysis
4.6.2 Correlation coefficient
Definition, calculation
4.6.3 Serial correlation
4.6.4 Basics of simple regression analysis
Response variable, explanatory variable, error
Regression line, regression coefficient, intercept
Observed value, fitted value, residual
4.6.5 Estimating correlation coefficient
Least squares method
4.6.6 Coefficient of determination (contribution ratio)
Range of coefficient of determination
Relation between coefficient of correlation
How to interpret coefficient of determination
4.6.7 Standard deviation of residuals
Checking residuals, regression diagnosis
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4.7 Design of Experiments
4.7.1 Basics of DoE
Response variable, factor, error
4.7.2 Principles of experimental design (Fisher's three principles)
Randomization
Replication
Blocking
4.7.3 Factors and levels
Type of factors
ANOVA
4.8 Acceptance Sampling
4.8.1 Type of acceptance sampling, OC curves
Basics of acceptance sampling
AQL, LTPD, AOQL
Types of acceptance sampling
4.8.2Sampling inspection plans having desired OC, JIS Z 9002, JIS Z 9003
Procedures and their application
4.9 Quality Function Deployment (QFD)
4.9.1 Interpreting QFD
Basic structure of QFD
Customer needs, VOC
Engineering characteristics, design quality
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