Tinh Chi Phi Phan Mem

7/30/2019 Tinh Chi Phi Phan Mem

1/16

Trng i Hc Bch Khoa H Ni

Vin Cng Ngh Thng Tin & Truyn Thng

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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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2/16

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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3/16

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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4/16

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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5/16

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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6/16

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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7/16

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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8/16

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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9/16

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


10/16

- 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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11/16

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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12/16

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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13/16

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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14/16

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


15/16

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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