Chuong 06-02.Cac Do Do Pham Mem

CNPMKhoa CNTT

Chng 6CC O PHN MM

Chng 01 - 1GV. PHHiThS. NTTMKhang

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


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


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.


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

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


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)


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


CNPMKhoa CNTT

V D 3

T l phn trm


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


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...


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


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


CNPMKhoa CNTT

S LIN H GiA 3 LoI CH S CHT LNG


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


CNPMKhoa CNTT

O PUM(Problems per User Month)

Cng thc

Lin h gia PUM v cht lng Lin h gia PUM v cht lng


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


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


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?


CNPMKhoa CNTT


Documents

Chuong 06-02.Cac Do Do Pham Mem