chuong 06-02.cac do do pham mem
DESCRIPTION
Các độ đo phần mềmTRANSCRIPT
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CNPMKhoa CNTT
Chng 6CC O PHN MM
Chng 01 - 1GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
O PHN MM
Khi nim v o phn mm Phn loi cc o phn mm
o cc thuc tnh sn phm ln ca phn mm
Chng 01 - 2GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
TI SAO PHI O
Tip cn nh lng c c sphn tch, nh gi mt cch khchquan v mt vn hay v mt iq ytng no .
Nghi ng, t gi thuyt, mun tmhiu :
oKt quPhn tchKt lun,d on Mi s o: KHNG phn nh ht mi
kha cnh ca i tngkha cnh ca i tng
Cn phi hp nhiu o, Vn dng thm cc tip cn nh tnh
Chng 01 - 3GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
2. TIN CY CA PHN MM
Cc o phn mm: tnh ton, clng c cc i lng lin quan ncc i tng, cc hot ng thuc v g gtin trnh sn xut phn mm. c lng gi gia cng, phng on kchthc.
nh gi cht lng phn mm. nh gi cht lng quy trnh sn xut.
CI TIN CHT LNG phn mm, tin trnh sn xut phn mm.
Chng 01 - 4GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
CC PHP O C BN
o da vo t s: Chia mt i lng cho mt i lng khc, t s v mu s ca t s l s phn t ca hai tp p php ri nhau
o da vo t l: T l khc vi t s ch t s tham gia vo mt phn g pca mu s:
T s thng dng cho 2 nhm ngi T s thng dng cho 2 nhm ngi, trong khi t l c th dng cho nhiu phm tr trong mt nhm. C th c nhiu hn hai phm tr:p
Chng 01 - 5GV. PHHi
ThS. NTTMKhang
o da vo t l phn trm
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CNPMKhoa CNTT
O FP
Thng c phm vi t 1:10 n 1:1 ph thuc vo qui m t chc tin trnh pht trin phn mm.p p
Vi cc t s nh: i ng xy dng phn mm lm c vic kim tra cc chc nng chi tit, trong khi i ng g g gkim tra phn mm thc hin vic kim tra mc h thng
Vi cc t s ln: i ng kim tra gphn mm c trch nhim chnh trong pha kim tra phn mm v m bo cht lng
Chng 01 - 6GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
V D 1
n phi thuyn con thoi: 70 nhn vin kim tra, 49 nhn vin pht trin phn mm, kt qu o:p q
70/49 7:5(ln hn nhiu so vi cc n thng thng)
Chng 01 - 7GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
V D 2
o ny ph thuc vo quan nimkhch hng: Gi tr o ln: phn mm cht lng
tt Gi tr o nh: phn mm cht
lng khng tt
C th khng phn nh c C t g p ccht lng bn cht ca
phn mm ang kho st
Chng 01 - 8GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
V D 3
T l phn trm
Chng 01 - 9GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
VI LU V T L %
Nn ghi nhn tng s cc trng hp ang xt (gi tr gc ca mu s trc khi qui v t l phn trm)q p )
S trng hp khng nn qu nh, nu ngc li th ch nn dng cc s liu gc g
Chng 01 - 10GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
PHN LOI CC O PHN MM
o cc c trng sn phm: kch thc, phc tp, s chc nng, hiu sut hot ng, xp loi cht g plng...
o qui trnh pht trin phn mm: tnh hiu qu ca vic kh li trong q gcc pha, kh nng kim tra pht hin li, thi gian hiu chnh li trung bnh...
o cc c trng n phn mm: g ps lng ngi tham gia n, vic b tr ngi trong cc hot ng khc nhau, thi gian biu, nng sut lao t ng trong n...
Chng 01 - 11GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
O CC THUC TNH SN PHM
Cht lng sn phm (rt nhiu gc khc nhau): t li d bo tr tng thch t li, d bo tr, tng thch T chc n th tt, c th ti s dng Low coupling v High cohesion
d m rng c th tin had m rng, c th tin ha phc tp ca sn phm Kch thc ( ln) sn phm
Chng 01 - 12GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
CC CH S DNG TRONGCC CH S DNG TRONG NH GI CHT LNG SN
PHM Thi gian trung bnh xy ra s c
(MTTF: Mean Time To Failure): i hichnh xc cao, thng c dng chog gcc h thng tuyt i an ton H thng iu khin my bay ln
xung H thng s dng trong cc trm
nghin cu v tr, trong cc trung tmch to v kh.
V d: Mt h thng iu khin mybay ln xung khng th ngng hotng nhiu hn 3 giy/nm.
Mt li (D f t d it ) Mt li (Defect density) S hi lng ca khch hng
Chng 01 - 13GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
S LIN H GiA 3 LoI CH S CHT LNG
Chng 01 - 14GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
CC VN KHCH HNG
Xt n tt c cc vn xy ra trongqu trnh s dng sn phm
Cc dng li dng c xt n: Cc dng li dng c xt n: Cc li thc s (do khuyt im ca
phn mm).Cc li gi Cc li gi:
Cc vn s dng phn mm Thng tin hay ti liu khng r rng Cc li thc s nhng b trng lp
(c phn nhnhiu ln) Cc li do chnh khch hng gy ra
o PUM
Chng 01 - 15GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
O PUM(Problems per User Month)
Cng thc
Lin h gia PUM v cht lng Lin h gia PUM v cht lng
Chng 01 - 16GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
S HI LNG CA KHCH HNG
S tha mn ca khch hng c oda trn mt s phm tr lin quanvi sn phm:p chc nng, tc , ti liu hng dn,
vic bo tr, dch v khch hng, S liu o c ly da trn 5 ngngS u o c y da t 5 g g
sau:
Rt tha mn (A) Tha mn (B)Tha mn (B) Va phi (C) Khng tha mn (D)
Rt khng tha mn (E) C th khng phn nh c cht
lng bn cht ca sn phm
Chng 01 - 17GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
LN CA PHN MM
Cn c n v tnh kch thc hay ln ca phn mm c th: So snh gia cc phn mm vi nhau So snh gia cc phn mm vi nhau Lm c s tnh nng sut lao ng
trung bnh:
S n v phn mm/gi lm vicS n v phn mm/gi lm vic Lm c s c lng mt phn
mm: B b hi h Bng c bao nhiu n v phn
mm Lm c s qui ra tin, v d: Hin
nay trung bnh cn 1 triu VND snnay trung bnh cn 1 triu VND snxut 1 n v phn mm
Chng 01 - 18GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
HAI HNG TIP CN LN PHN MM
Da trn s dng m ngun, n vtnh: LOC (Line Of Code) hay SLOC LOC (Line Of Code) hay SLOC KLOC (Thousand Lines Of Code) hay
KSLOC
Da trn s im chc nng n v Da trn s im chc nng, n vtnh: FP (Function Point)
Cch tnh s FP ca 1 phn mm?
Chng 01 - 19GV. PHHiThS. NTTMKhang
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CNPMKhoa CNTT
Chng 01 - 20GV. PHHiThS. NTTMKhang