Activity definition q Activity sequencing q Activity duration





















































































- Slides: 85









软件项目进度(时间)管理过程 活动定义(Activity definition) q 活动排序(Activity sequencing) q 活动历时估计(Activity duration estimating) q 任务资源估计 q 制定进度计划(Schedule development) q 进度控制(Schedule control)-项目跟踪 q chapter__4 8





任务(活动)之间排序的依据 强制性依赖关系 q 软逻辑关系 q 外部依赖关系 q 里程碑 q You must determine dependencies in order to use critical path analysis chapter__3 13



网络图图例 chapter__3 16

常用的网络图 q PDM (Precedence Diagramming Method ) q q 优先图法 , 节点法 (单代号)网络图 ADM (Arrow Diagramming Method ) q 箭线法 (双代号)网络图 chapter__3 17







甘特图-实例 chapter__3 24


里程碑图示 Available Announce Testing Specification 9/00 5/99 Coding Design 11/00 02/99 11/98 08/98 chapter__3 26

里程碑图示 chapter__3 27


资源图 chapter__3 29








建议掌握模型 Walston-Felix(IBM): D=2. 4*E exp(0. 35) q 基本COCOMO: D=2. 5(E)exp(db),db: 0. 32 -0. 38 q 方式 db 有机 0. 38 半有机 0. 35 嵌入式 0. 32 chapter__3 37





CPM估计 A: 100天 开始 结束 B: 10 天 chapter__3 42




PERT Formula and Example: PERT weighted average = 8 workdays + 4 X 10 workdays + 24 workdays = 12 days 6 where 8 = optimistic time, 10 = most likely time, and 24 = pessimistic time chapter__3 46




PERT举例 2, 3, 6 1 2 J 项 活动 J K L 4, 6, 8 K O, M, P 2, 3, 6 4, 6, 8 3, 4, 6 估计项目总历时 3 E δ 3, 4, 6 L δ 3. 33 4/6 16/36 6 4/6 16/36 4. 17 3/6 9/36 13. 5 1. 07 41/36 chapter__3 4 2 50

标准差与保证率 68. 3% 95. 5% 99. 7% chapter__3 51


PERT举例 T=E+δ 68. 3/2 % 50% =13. 5+1. 07=14. 57 =34. 2% P=50%+34 2%=84. 2% -3 δ -2 δ -1 δ E 68. 3% +1 δ +2 δ +3 δ 95. 5% 99. 7% chapter__3 53













CPM估计 2 A: 100天 1 B: 10天 3 chapter__3 66

进度时间参数 A: ES=0, EF=100 LS=0, LF=100 A: 100 B: 10 ES=0, EF=10 B: 10 公式: EF= ES+duration LS=90 , LF=100 TF=LSES=90 TF=LFEF=90 LS=LF- duration TF=LS-ES =LF-EF chapter__3 67


进度时间参数 B: ES=0, EF=10 LS=80, LF=90 A: 100 TF=LS-ES=80 B: 10 Lag=5 FF= 0 C: 5 C: B: 10 C: 5 B: 10 公式: ES(S)= EF(P) + Lag, LF(P) = LS (S) – Lag ES=15, EF=20 LS=95, LF=10 0 TF=LS-ES=80 TF=LS-ES, FF= ES(S)-EF(P)- Lag chapter__3 69

Float 例子 EF(C)=ES (C) +6=14 ES(G)=EF(C)+0=1 4 LF(C)=LS(G)0=14 LS(C)=LF (C) -6=8 TF=8 chapter__3 FF=1 70

同时浮动? B: ES=0, EF=10 LS=80, LF=90 A: 100 TF=LS-ES=80 B: 10 Lag=5 FF= 0 C: 5 C: B: 10 C: 5 ES=15, EF=20 LS=95, LF=10 0 TF=LS-ES=80 chapter__3 71




Simple Example of Determining the Critical Path n Consider the following project network diagram. Assume all times are in days. a. How many paths are on this network diagram? b. How long is each path? c. Which is the critical path? d. What is the shortest amount of time needed to chapter__3 complete this project? 75

Determining the Critical Path for Project X chapter__3 76



正推法实例 ES EF 1 ES 8 EF 8 Duration=7 Task A ES 14 EF 14 Duration=6 Task C 17 Duration=3 Task G ES LF LS Start ES LS EF 1 4 ES EF 4 Duration=3 Task B LS LF ES 7 7 ES 10 19 Finish Duration=2 Task H LS LF Duration=3 Task E LF LS 17 EF Duration=3 Task D LF LF LS EF LS LF EF 4 6 Duration=2 Task F LS LF 当一个任务有多个前置时,选择其中最大的最早完成日期 chapter__3 79 作为其后置任务的最早开始日期


逆推图示 ES EF 1 ES EF 8 8 Duration=7 Task A EF 14 14 Duration=6 Task C 1 8 LF LS ES 8 Duration=3 Task G 14 14 LF LS 17 17 LF LS ES EF 17 Start ES EF 1 ES EF 4 4 LS 11 LF 7 Duration=3 Task D 11 LF ES 4 6 Duration=2 Task F LS 14 LS EF 12 10 17 LS 19 LF Duration=3 Task E 14 LS Finish Duration=2 Task H EF 7 Duration=3 Task B 8 ES 19 14 LF 17 LF CP: A->C->G>H Cp Path: 18 当一个前置任务有多个后置任务时,选择其中最小最晚开始日 chapter__3 81 期作为其前置任务的最晚完成日期


课堂练习 ES EF ES Duration=6 Task B ES EF LS ES EF EF Duration=7 Task C LF LS Duration=5 Task D LF LS LF ES EF 0 Duration=3 Task G Duration=4 Task A LS LF ES ES EF Duration=8 Task E LS EF Duration=8 Task F LF LS LF 1. 确定CP以及CP的长度? chapter__3 2. F的自由浮动和总浮动? 83

课堂练习-答案 ES EF ES 4 10 12 Duration=6 Task B 6 ES EF 19 Duration=7 Task C 12 19 19 LS LF LS 4 0 LS 24 LF ES EF 24 27 Duration=3 Task G Duration=4 Task A 0 24 Duration=5 Task D 12 LF LS ES EF 24 4 LF ES 4 EF ES 12 12 Duration=8 Task E 4 12 LS EF 20 Duration=8 Task F 16 24 LF LS CP: A->E->C->D->G LF CP Path: 27 chapter__3 27 LF LS TF(F)=4 FF(F)=4 84
The estimated duration for each activity must be the
Activity duration estimating
Valuing bonds with embedded options
True labour pain
Sat testing time length
Convexity formula
Midas menarche interval duration
Miub gyne
Duration gap calculator
Lesson plan duration
Insulin peak and duration
Bono bullet ejercicios
Portfolio immunization example
Convexity duration formula
Ap duration heart
Duration de un bono
Convexity duration formula
Interest rate duration
Project cost duration graph
Project cost duration graph
Pure yield pickup swap
How to find expected return
Bond equivalent yield
Phenytoin mechanism of action
Phenytoin mechanism of action
Aspergilloma treatment duration
Load duration curve in excel
Flow duration curve ppt
Project cost duration graph
Portfolio duration formula
Tir excel
Abc narrative recording example
Duration recording example
Micro lesson plan format
Ehud nakar
Neuron
Project cost duration graph
Reducing project duration
Gamsat information
How to calculate duration gap
Duration của trái phiếu là gì
Ieee membership duration
Anatomy of fire extinguisher
Duration modificada
Duration of stm
Duration recording behavior data sheet
Duration of equity
Frame duration flexible legacy
Project duration
Project duration example
Income gap formula
Insulin table
Ese project management
Elements of music duration
Nph onset and peak
Ultra long duration balloon
Duration investopedia
Ieee membership duration
Ab testing basics
Sequencing ap computer science
Exome sequencing project
Example of sequence
Sequencing valve symbol
Sequence words
Scheduling decisions
Rna sequencing steps
Sequence selection iteration
Microprogram sequencer block diagram
Johnson rule for 3 machines
Job sequence
Illumina sequencing chemistry
Cask of amontillado quiz
Signing naturally unit 9.10 minidialogue 3 answers
5.9 commonly fingerspelled words
Per partes
Shotgun sequencing
Rooster's off to see the world sequencing
History of sequencing
Pyrogram
Shotgun sequencing
Dna
History of sequencing
Scheduling loading sequencing and monitoring
Are you my mother sequencing cards
Spt rule example
Microinstruction sequencing in computer architecture