manper07 fmea

Manajemen Perawatan – 05 FMEA Arif Rahman – Universitas Brawijaya1

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FAILURE MODE & EFFECT ANALYSIS

Teknik IndustriUniversitas Brawijaya

Manajemen Perawatan – 05 FMEA Arif Rahman – Universitas Brawijaya

Metode Pengukuran

ResikoFault Tree AnalysisFailure Mode and Effect Analysis

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DefinitionProbabilitas: peluang atau kemungkinan kemunculan satu kejadian.

Resiko: peluang kemunculan satu kejadian yang tidak diharapkan serta tingkat kritis dampak yang diakibatkan.Pengukuran Resiko: proses kategorisasi resiko secara kualitatif atau estimasi resiko kuantitatif.Manajemen Resiko : proses identifikasi resiko, pengukuran resiko, disposisi resiko serta monitor dan kontrol resiko.

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DefinitionReliability: Probabilitas sistem berfungsi andal dan efektif dalam kondisi spesifik selama periode tertentu tanpa terjadi kegagalan atau kerusakan.

Safety: Tingkat keamanan bebas dari kecelakaan, cedera, kerusakan atau kehilangan sumber daya. Hazard: Kondisi yang beresiko mungkin menyebabkan atau berkontribusi terjadinya mishap.

Mishap: Kejadian yang tidak diharapkan karena dapat menyebabkan kecelakaan, cedera, kerusakan atau kehilangan sumber daya.

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Failure Mode & Effect

AnalysisFailure Mode & Effect Analysis (FMEA) merupakan metode analisis manual untuk menentukan konsekuen dari kegagalan komponen, modul atau subsistemFMEA berwujud tabel spreadsheet yang mengidentifikasi macam kegagalan (failure), faktor kegagalan (failure mode), akibat kegagalan (failure effect), penyebab (possible causes), frekuensi kejadian (probability of occurrence), dampak kegagalan (severity) konsekuensi (consequences), dan rekomendasi (proposed safeguards).

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FMEA Steps

1. For each process input (start with high value inputs), determine the ways in which the input can go wrong (failure mode)2. For each failure mode, determine effects. Select a severity level for each effect3. Identify potential causes of each failure mode. Select an occurrence level for each cause4. List current controls for each cause. Select a detection level for each cause

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FMEA Steps

5. Calculate the Risk Priority Number (RPN)6. Develop recommended actions, assign responsible persons, and take actions. Give priority to high RPNs.7. Assign the predicted severity, occurrence, and detection levels and compare RPNs

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Failure Modes and

EffectsThe relationship between failure modes and effects is not always 1 to 1

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Failure Mode 1

Failure Mode 2

Effect 1

Effect 2

Failure Mode 1

Failure Mode 2Effect 1

Failure Mode 1Effect 1

Effect 2


Severity, Occurrence, and Detection

SeverityImportance of the effect on customer requirements• Often can’t do anything about this

OccurrenceFrequency with which a given cause occurs and creates failure modes

DetectionThe ability of the current control scheme to detect or prevent a given cause

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Severity1 = Not Severe, 10 = Very Severe

Occurrence1 = Not Likely, 10 = Very Likely

Detection1 = Likely to Detect, 10 = Not Likely to Detect

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Untuk menilai tingkat konsekuensi atau severity dari

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Risk Priority Number

(RPN)RPN is the product of the severity, occurrence, and detection scores.

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Severity Occurrence Detection RPNRPNX X =


Truck Stop Coffee Process Map

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Inputs OutputsInputs OutputsHot WaterSoapScrubber

Clean CarafeCold WaterMeasuring Mark

Full Carafe

Filter

Maker w/FilterFresh CoffeeDosing Scoop

Maker w/Filter & Coffee

Brewing Coffee

Cleaned CarafeDirty WaterWet Scrubber

Full Carafe

Filled MakerEmpty Carafe

Maker w/Filter

Maker w/Filter & Coffee

Operating MakerHeatBrewed Coffee

Hot Coffee

CustomerOrderSize Specification

Complete OrderHot CoffeeCup

Filled CupCustomerCreamSugarAmount Desired

Complete OrderMoney

Coffee Delivery

Complete Order

Filled Cup

Customer ReplyAmount SpecifiedComplete Order

Make ChangeTemperatureTasteStrength

SmileHappy Customer

Pour Coffee into Cup

Offer Cream &

Sugar

Complete Transaction

Say Thank You

Receive Coffee Order

Clean Carafe

Fill Carafe w/Water

Pour Water into Maker

Place Filter in Maker

Put Coffee in Filter

Select Temperature Setting

Turn Maker On


Truck Stop Coffee C&E Matrix

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Temp of Coffee Taste Strength Process Outputs

8 10 6 Importance

Process Step ----- Process input ----- --------- Total ---------0

Clean Carafe 0 3 1 36Fill Carafe with Water 0 9 9 144Pour Water into Maker 0 1 1 16Place Filter in Maker 0 3 1 36Put Coffee in Filter 0 9 9 144Turn Maker On 3 1 0 34

Select Temperature Setting 9 3 3 120Receive Coffee Order 0 0 1 6Pour Coffee into Cup 3 1 3 52Offer Cream & Sugar 3 9 3 132

Complete Transaction 1 1 1 24Say Thank You 0 0 0 0

00000000000

--------- Correlation of Input to Output ---------


Step 1: For Each Input, Determine the Potential Failure Modes

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Step 2: For Each Failure Mode, Identify Effects and Assign Severity

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Step 3: Identify Potential Causes of Each Failure Mode and Assign Score

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Step 4: List Current Controls for Each Cause and Assign Score

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Step 5: Calculate RPNs

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Step 6: Develop Recommended Actions, Assign Responsible Persons, and Take Actions

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Step 7: Assign the Predicted Severity, Occurrence, and Detection Levels and Compare RPNs

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Manajemen Perawatan – 05 FMEA Arif Rahman – Universitas Brawijaya22

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