Tinh Chi Phi Phan Mem
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Transcript of Tinh Chi Phi Phan Mem
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Trng i Hc Bch Khoa H Ni
Vin Cng Ngh Thng Tin & Truyn Thng
------------ ------------
Xy dng D n u t cng ngh thng tinqun l cho mt trng i hc vi kch c
bc trung
Ging Vin Hng Dn: PGS.TS.Hunh Quyt Thng
Nhm 13:L Ngc Giang 20080793ng Tun Anh 20080024Phan nh Thi 20083496Trnh Quang Ha 20081023L Quang Tip 20082674
Lp: CNPM-K53
H Ni, 04-2012
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Phn I: Tng quan v quy m d n1. Tn d n: Xy dng h thng thng tin qun l cho trng i hc bc trung phc
v cho cng tc qun l ca trng.
2. Quy m: H thng phc v cho trng vi kch c tuyn sinh khong 2500 sinhvin/ 1 nm. C 5 n 8 khoa o to cc ngnh sinh vin theo cc ngnh kinh t, kthut. Trng c khong 4 n 6 phng ban (HCTH, TCCB, TH, CTCT-CTSV,Quntr - Thitb,)
Phn II: Lp d ton chi ph u t d n:
Lp tng mc u t:S dng phng php: xc nh theo thit k s b d n
Tng chi ph:
V = GXL + GTB + GQLDA + GTV + GK+ GDP
Trong :
- GXL : chi ph xy lp;
- GTB : chi ph thit b;
- GQLDA: chi ph qun l d n;
- GTV : chi ph t vn u t ng dng cng ngh thng tin;
- GK : chi ph khc;
- GDP : chi ph d phng.
Xc nh chi ph xy lp:
GXL =
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Trong :
- QXLj: khi lng cng tc xy lp ch yu th j ca d n (j=1 n);
- Zj: n gi cng tc xy lp ch yu th j. n gi c th l n gi xylp y hoc gi xy lp tng hp y (bao gm chi ph trctip v c chi ph chung, thu nhp chu thu tnh trc). Trng hpZj l gi xy lp khng y th chi ph xy lp c tng hp theoBng 3.1 Ph lc s 3 ca Thng t ny;
- TGTGT_XL: mc thu sut thu gi tr gia tng quy nh cho cng tc xy lp.
Xc nh chi ph thit b
Cn c cc m t yu cu k thut cn p ng c quy nh ti iu22 Ngh nh 102/2009/N-CP ly cc bo gi ca cc n v c iu kin v xy dng phn mm tng t lm c s d tnh gi tr phnmm ni b trong tng mc u t.
Phn tch s b h thng:
Cc yu cu nghip v:
nh gi mc BMT (B = Bt buc, M = Mong mun, T = Ty chn)
Phn tch v m hnh ha biu v cc trng hp s dng (Use case)
Tp hp cc usecase:
Phn loi use case
nh gi mc Use case:
- Use case n gin.
- Use case trung bnh.
- Use case phc tp.
Xc nh im cc tc nhn (TAW)
m im cc tc nhn.
Xc nh im cc trng hp s dng (TBF)
m im cc trng hp s dng.
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Xc nh h s phc tp - cng ngh ca phn mm (TCF)
Xc nh cc h s nh gi phc tp - cng ngh ca phn mm.
Xc nh h s tc ng mi trng cho pht trin, nng cp, chnh saphn mm (EF)
Xc nh gi tr n lc pht trin, nng cp, chnh sa phn mm (E)
E = 10/6*AUCP
Trong :
AUCP = UUCP*TCF*EF
UUCP = TAW + TBF
Ni suy nh gi kinh nghim, ni suy nng sut lao ng trong pht trin,nng cp, chnh sa phn mm
P = ngi/gi/AUCP
Xc nh mc lng lao ng bnh qun cho nhn s tham gia pht trin,
nng cp, chnh sa phn mm
H = ngi/gi
Xc nh gi tr phn mm
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I Tnh im trng hp s dng (Use case)
1. im Actor (TAW)
2. im Use case (TBF)
3. Tnh im UUCP UUCP = TAW + TBF
4. H s phc tp v KT-CN (TCF) TCF = 0,6 + (0,01 x TFW)
5. H s phc tp v mi trng (EF) EF = 1,4 + (-0,03 x EFW)
6. Tnh im AUCP AUCP = UUCP*TCF*EF
II Ni suy thi gian lao ng P = ngi/gi/AUCP
III Gi tr n lc thc t (E) E = AUCP*100/60
IV Mc lng lao ng bnh qun (H) H = ngi/gi
V nh gi sn phm (G) G = 1,4 * E * P * H
Chi ph qun l d n
Xc nh chi ph d phng
Chi ph d phng (GDP) c xc nh bng tng ca chi ph d phng theocng thc:
GDP= (GXL + GTB + GQLDA + GTV + GK) x Kps (1.3)
Trong :
- Kps: h s d phng l 5%.
Lp tng d ton
2.1 Xc nh chi ph xy lp:
Chi ph vt liu, nhn cng, my thi cng
Chi ph chung:
Lp n gi xy lp:
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Tng hp chi ph xy lp:
STT NI DUNG CHI PH CCH TNHGITR
KHIU
I CHI PH TRC TIP
1 Chi ph vt liu VL
2 Chi ph nhn cng NC
3 Chi ph my thi cng M
Chi ph trc tip VL+NC+MTC T
II CHI PH CHUNG T x t l C
IIITHU NHP CHU THUTNH TRC
(T+C) x t l TL
Chi ph xy lp trc thu (T+C+TL) G
IV THU GI TR GIA TNG G x TGTGT-XL GTGT
Chi ph xy lp sau thu G + GTGT GXL
TNG CNG GXL
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NH MC CHI PH CHUNG, THU NHP CHU THU TNH TRC
n v tnh: %
STT CHI PH CHUNG THU NHP CHU THU TNH TRC
1 65,0 6,0
- Chi ph chung tnh trc c tnh bng t l phn trm (%) trn chi phtrc tip;
- Thu nhp chu thu tnh trc c tnh bng t l phn trm (%) trnchi ph trc tip v chi ph chung trong chi ph xy lp;
- i vi cc d n trin khai ti vng ni, bin gii, hi o th nh mct l chi ph chung s c iu chnh vi h s t 1,05 n 1,1 do ch u tquyt nh tu iu kin c th ca d n.
2.2 Xc nh chi ph thit b
Chi ph mua sm
Chi ph o to v chuyn giao cng ngh
Chi ph lp t thit b v ci t phn mm
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2.3 Xc nh chi ph qun l d n
2.4 Xc nh chi ph t vn u t
2.5 Xc nh chi ph khc:
2.6 Xc nh chi ph d phng
Lp nh mc d n
3.1 Lp danh mc cng vic
3.2 Thnh phn cng vic
3.3 Hao ph vt liu My thi cng
3.4 Lp cc tit nh mc trn c s tng hp cc hao ph v vt liu, nhncng, my thi cng.
Phn III: Qun l chi ph u t cho d n.
Qun l tng mc u t d n
Thm nh ph duyt tng mc u t- Xc nh tng mc u t tnh ton hiu qu u t ng dng cng ngh
thng tin. Tng mc u t c ghi trong quyt nh u t do ngi quytnh u t ph duyt l chi ph d tnh m ch u t c php s dng u t ng dng cng ngh thng tin v l c s lp k hoch v qun l vnkhi thc hin u t ng dng cng ngh thng tin.
- Giao cho n v u mi t chc thm nh tng mc u t trc khi phduyt.
- Nu thu cc t chc, c nhn t vn c iu kin nng lc, kinh nghimchuyn mn thm tra tng mc u t th ni dung thm tra nh ni dungthm nh; chi ph thm tra c xc nh trn c s nh mc chi ph t lhoc bng cch lp d ton theo hng dn ca B Thng tin v Truynthng.
iu chnh tng mc u t
- Nu xut hin 1 trong cc trng hp sau th iu chnh mc u t.
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o Khi xut hin nhng yu t mi em li hiu qu cao hn cho d n;
o Khi xut hin cc yu t bt kh khng: ng t, bo, l, lt, lc,sng thn, l t; chin tranh hoc c nguy c xy ra chin tranh hoc
cc s kin bt kh khng khc v c tc ng trc tip n d n;o Khi k hoch ng dng cng ngh thng tin c cp thm quyn
iu chnh c nh hng trc tip ti quy m, mc tiu trin khai cad n.
- Tng mc u t iu chnh c xc nh bng tng mc u t cph duyt cng (hoc tr) phn tng mc u t b sung. Gi tr phn tngmc u t b sung c xc nh thnh mt khon chi ph ring v phi
c t chc thm nh hoc thm tra trc khi quyt nh ph duyt.
Qun l d ton ca d n
a. Thm nh, ph duyt tng d ton
T chc thm nh tng d ton hoc thu cc t chc, c nhn t vn c
iu kin nng lc, kinh nghim chuyn mn thm tra tng d tonb. iu chnh tng d ton
- Nu ri vo mt trong cc trng hp theo quy nh ti iu 14 thng t 06th iu chnh li tng d ton.
- Nu c iu chnh tnh ton d ton b sung da vo ph lc 4 thng t06
- T chc thm nh v ph duyt d ton ng dng cng ngh thng tin iuchnh
- iu chnh gi hp ng, gi thu
Qun l nh mc
Qun l nh mc ng dng cng ngh thng tin
- nh mc ng dng cntt theo quy nh ca b tttt9
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- Thu t chc t vn c iu kin nng lc, kinh nghim chuyn mn thc hin lp, iu chnh, thm tra cc nh mc v t chc t vn chu trchnhim v tnh hp l, chnh xc ca cc nh mc thc hin.
- p dng, vn dng nh mc ng dng cng ngh thng tin c cng bhoc iu chnh, xy dng mi lp v qun l chi ph u t ng dng cngngh thng tin.
Thanh ton kt ton
1. Thanh ton vn u t:
Thanh ton vn u t thc hin theo quy nh ti cc ngh nh ca Chnh
ph, thng t ca B Ti chnh hng dn vic qun l, thanh ton vn u tv vn s nghip c tnh cht u t v xy dng thuc ngun vn ngn schnh nc.
2. Quyt ton vn u t
Quyt ton vn u t thc hin theo cc thng t hng dn ca B Tichnh v vic quyt ton vn u t xy dng c bn thuc ngun vn ngn schnh nc theo nin ngn sch hng nm v hng dn quyt ton d n honthnh thuc ngun vn nh nc.
Phn IV: Xy dng khung trang thit b mua sm v m hnhtng th hthng mng ca trng
M hnh tng th:
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c tnh s lng thit b cn dng:
Tn thit b S lng Cu hnh Ghi chMy ch cp 1(Main Server)
1 Window server 200864bit.
4 CPU * 3GHz8GB RAM.
Ch cn 1 server chnh
My ch cp 2(Server Level 2)
12 Chip intel core i7.CPU 2.6GHzRAM 4 GB
Mi khoa v mi phng cn1 my ch cp 2
Cc my client 60 Intel Pentium IV.CPU 2.4GHz. Ram:2GB
Mi khoa hay phng cnkhong 5 my Client.
Modem 20Switch 20
Dy mng 500 mRAM Server 20 thanh 4GB
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HDD Server 20 1TBRouter 20
Phn V:Dng Cocomo c lng gi ca phn mm cng thngtin trng hc.
Tng quan v phn mm:Phn mm cng thng tin trng i hc theo tnh ton s c khi lng khong 10000dng code v c lm trong vng 12 thng vi cc iu kin mi trng lm vic bnhthng (normal).
Lng 1 nhn vin d n l 300$/thng.
S dng COCOMO tnh ton c lng gi ca phn mm:Ta s dng cng thc ca phng php COCOMO:
Cng thc tnh cng sc (Effort) trong trng hp ny l:
E = A * Sb * M trong :
E: Effect
M: Tch ca 17 h s nhn
A = 2.94
S: Kch thc c lng ca h thng (theo KDSI)
b = 1.01+0.01 * Wi
Ta c bng cc h s M:
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Ta c bng cc h s ca W
Vi cc ch lm vic mc normal, ta tnh c :
M = 1;
b = 1.01+0.01 * ( 2.43 + 3.64 + 2.53 + 2.97 + 2.73) =1.153
S = 20 (KSLOC)
E = 2.94 x 20 x 1.35 x 1 = 67.7964 (PM)
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Gi thnh c lng ca phn mm l: 67.7964 x 300 = 20338.92 ($)
Phn tch cc yu t ti chnh:
NVP:
nh ngha v cng thc tnh NVP:NPV Net present value Gi tr hin ti thun (hay gi tr hin ti rng) l hiu s gia tnggi tr hin ti ca cc dng doanh thu (cash inflow) tr i gi tr hin ti dng chi ph (cashoutflow ) tnh theo li sut chit khu la chn . Khi nim gi tr hin ti thun c s dngnhiu trong vic thm nh hiu qu cc d n u t trong hoch nh ngn sch u t , phntch kh nng sinh li ca d n u tauw ( Nu li sut chit khu hp l , NPV cng ln thkh nng tr n ca d n cng cao ) .
NPV : L chnh lch gia tng gi tr hin ti ca cc dng tin thu c trong tng nm thchin d n vi vn u t b ra xy dng d n c thc hin ti ha thi im phn tch .Cng thc tnh :
n
NPV =
i=0
Trong :
Bt : Dng tin vo d n nm th t
o Li nhun ca d n ( Li nhun trc thu xc nh hiu qu kinh t
,li nhun sau th xc nh hiu qu ti chnh )
o Tin thanh l ti sn (nu c)
o Tin thu hi vn lu ng ( nu c )
Ct : Dng tin ra ca d n nm th t hay chnh l VT m nh u t b ra thchin d n
n- : S nm i ca d n
r - : Li sut chit khu c chn
p dng tnh NVP cho d n:Chi ph nhm pht trin b ra u t vo d n l 20338.92 ($)
Li sut chit khu ly bng li sut vay vn ngn hng l 17% hay 0.17
S tin nh u t tr l 25000($)14
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S nm vng i d n l n = 1
Ta c : NVP = (25000 20338.92) / (1 + 0.17) = 3983.83($)
PBP:
nh ngha:PBP ( Pay Back Period ) -Tiu chun thi gian hon vn
Thi gian hon vn l thi gian cn thit dng tin to ra t d n b p chiph u t ban u cho d n .
C s chp nhn d n da trn tiu chun thi gian hon vn :
Nu thi gian hon vn d n c chp nhn
Nu thi gian hon vn > thi gian hon vn yu cu => d n b t chi
Thi gian hon vn c xc nh da trn dng tin t do ca d n
Thi gian hon vn chia lm 2 loi :
Thi gian hon vn c chit khu (DPP)
o u im : n gin ( th hin c tnh thanh khon v tnh ri ro ca d
n )
o Nhc im :
Khng xt n dng tin t do sau thi gian hon vn
Khng quan tm n gi tr tin t theo thi gian .
Thi gian hon vn yu cu mang tnh ch quan ,khng c c sno xc nh
Thi gian hon vn khng c chit khu ( PP )
o u im : Quan tm n thi gi tin t theo thi gian .
o Nhc im : Cn quyt nh t sut li nhun ph hp . Mt d n c thi
gian thu hi vn c chit khu ngn hn 1 d n khc khng c ngha l dn ny c NPV ln hn .
PBP ca d n: y chn phng thc hon vn khng chit khu. thi gian hon vn tiu chun l 1 nm.
Trong qu trnh hon vn c th x dch 2-3 thng do cc vn lin quan n thanh khon,thanh ton, hon lu vn.
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ROI
nh ngha:ROI (Return on Investment ) T l hon vn u t
Khi nim : L mt khi nim quen thuc o lng hiu qu u t ca ng vn b ra .
Cng thc :
ROI =
ROI ca d n:ROI = (25000 20338.92 ) / (20338.92) = 0.23 = 23%.
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