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Lesson 2 Introduction to Personal Software Process

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Lesson 2 Introduction to Personal Software Process www.ict.pyo.nu.ac.th/uthais/ KANOKWATT SHIANGJEN School of Information and Communication Technology., University of ... – PowerPoint PPT presentation

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Title: Lesson 2 Introduction to Personal Software Process


1
Lesson 2Introduction to Personal Software Process
  • www.ict.pyo.nu.ac.th/uthais/

KANOKWATT SHIANGJEN
2
Contents
  • ????????? PSP
  • ??????????????????? PSP
  • ??????????????????????
  • ???????????????
  • ????

3
????????? PSP
  • PSP (Personal Software Process)
    ??????????????????????????????????????????????????
    ???????????? ??????????????? Watts S Humphrey
    ??? SEI (Software Engineering Institute)
  • ???????????? ?????????????????????????????????
    ??????????????? ??????????????????????????????????
    ?????? ?????????????????????????????????????????
    ????????????????????? ?????????
    ???????????????????????? ???????? CMMI ??????????
    CMMI ???????????????????

4
???????????? PSP
  • ????????????????????????? ???????????????
    ????????????????????????????????????????
    ?????????????? (Measure) ?????????? ?
    ????????????????????????????????????????
    ??????????
  • ???????????? (Defect)
  • ????????????????????? ??????????????? (Planning
    Estimation)

5
??????????????????????
  • ???????????????? ?????????????????????????????????
  • ??????????????????????????? ??????????????????????
    ?????????? ????? ???????????????
  • ?????? ????????????????????????? (Component)
    ????????????
  • ?????? ??????????????????????????????
  • ?????? ???????????????????????????????
  • ?????? ??? ????? ????????? ????????????
    ????????????????????????????????
  • ???????????????? ?????????????????????????????????
    ??????????
  • ?????????????????? ??? ??????????
    ???????????????? ?????????????????

6
??????????????????? PSP
  • ??????????????? ?????????????????
    ???????????????????????????????????????????
    ?????????????????? ???????????????????????????????
    ???????? ??????????

7
??????????????????? PSP
  • PSP 0 ??? 0.1 The baseline Personal Process
  • PSP 1 ??? 1.1 Personal Project Management
  • PSP 2 ??? 2.1 Personal Quality Management
  • PSP 3 Cyclic Personal Process

8
PSP 0
  • ???????????????????????????????? ????????????????
    ?????? ??????????????(Size) ???? (Time)
    ????????????? (Defect) ?? 6 Phases ???
  • PLANNING
  • DESIGN
  • CODING
  • COMPILE
  • TESTING
  • POSTMORTEM
  • ?????????????????????????????? ???????
    ?????????????? ?????? Expert Judgment
    (?????????????????????????????????)

9
PSP 0
  • ??????????????
  • Current Process ??????????????????????????????????
    ????????
  • Time Recording ????????????? Time Log
  • Defect Recording ????????????? Defect Log
  • Defect Type Standard

10
PSP 0.1
  • ???????????????????? PSP 0 ??????????
  • PIPs (Process Improvement Proposals) ???????????
    ??????????????????????????????????????????????????
    ????????????????????????
  • Size Measurement ??????????????????????????????
  • Coding Standard ??????????????????????????????????
    ???

11
PSP 1.0
  • ????????????????? (Size) ??????????????? (Effort)
    ????????????????? ??????????????
    ???????????????????? ?????????????????????????????
    ??????????????
  • ?????????????????????????????????????????? PROBE
    (Proxy-Based Estimating) ?????????????????
    (Proxy) ???? ??????????? (LOC) /?????????????
    (Function Point) ???????????????????
    ???????????????????????????????????????
    (Historical Data) ??????????????????????????
    (LOC) ????? ??????????
  • Size Estimating
  • Test Report

12
PSP 1.1
  • ??????????????? PSP 1 ????????????????????
    ??????????? (Task and Schedule Planning)

13
PSP 2.0
  • ??????????????????????????????????????????
    (Personal Design) ????????????????????????????????
    ????? (Code Review) ??????????????????????????????
    ???????? ? (Preventive) ?????? Review Checklists
    ???????????????????????????????????
    ???????????????????????????????????? ?
  • ???????????????? Review ??????????????????????????
    ?? 6 Phases ?????????????? 2 Phases ???
  • Design Review ??????????????? Design ?????
  • Code Review ???????????????????? Code ?????

14
PSP 2.1
  • ???????? (Review) ???????????????
    ????????????????????????????????????????? COMPILE
    ??????? ??????????? UNIT TEST ????????????????????
    ??????????????? ????????????????????????
  • PSP2.1 ??????????????????????????? ?????????? 4
    ?????? (Templates) ???
  • ????????????????????? (Operational Specification)
  • ??????????????????? (Functional Specification)
  • ???????????????? (State Specification)
  • ???????????????? (Logic Specification)

15
PSP 3.0
  • ??????????????????????????????????????????????????
    ???????????????????????????? ?????????????????????
    ? ???????????????? (Productivity)
    ??????????????????????????????????????????????????
    ?????????? ????????????????????????????????????
    ??????????????????????
  • ??????? ??????????????????????????
    ??????????????????????????????????
    ????????????????? (Break-down) ???????????????????
    ????????????????????????????????????????????????

16
?????????????????????? (1/3)
  • Logs ??????????????????? ???? Time ??? Defect
    Log
  • Instructions ??????????????????????
  • Scripts ?????????????????????????????????
    ??????????
  • Step ???????
  • Purpose ????????????
  • Entry and Exit Criteria ??????????????????? /
    ???????

17
?????????????????????? (2/3)
  • Forms and Templates ??? ??????????????????????????
    ???????????
  • Form ???????????????????????????????? ??? Summary
    form ???????????????
  • Templates ????????????????????????????????? ????
    Size Estimating Template, Test Report Template,
    Task and Schedule Planning Templates, PIP ???
    Design Templates

18
?????????????????????? (3/3)
  • Standards ?????????????????????????
    ??????????????????????????????????????????????????
    ?????????????????????????? ???? Defect Type
    Standard, Coding Standard ??? LOC Counting
    Standard
  • Checklists ???????????????????
    ??????????????????????????????????????????????????
    ????? ???? Design Review Checklists ??? Code
    Review Checklists

19
??????????????? (Measure)
  • ?????????????????????????? (Development Time
    Measurement)
  • ??????????????????? (Defect Recording)
  • ???????????????????? (Size Measurement)
  • ????????????????? (Project Plan Summary)
  • ?????????????? (PSP Derived Measures)
  • ????? / ???????????????? PSP

20
?????????????????????????? (Development Time
Measurement)
  • ????????????????? PSP ????????????????????????????
    ? Phase ??????????????????????????????????? ????
    ??????????? ??????? ?????????????????? Time
    Recoding Log ????????????? ????????? Plan ???????
    7.58 8.45 ??????? 47 ???? ??? ????????? (Delta
    Time Total Time Interruption Time) ??? 44 ????

21
????????????????????????????
  • ???????????? ?????????????????????????????????????
    ???????????
  • ???????????????????????? (Interruption Time)
    ??????????????????????????????????????????
    ??????????????????????????????????
  • ???????????????????????? ??????????????
    ??????????????????????????????????????????????????
    ????????? ???? ????????????????????????????????
    ???????

22
??????????????????? (Defect Recording)
  • ???????? ?????????? (Defect) ???
    ????????????????? ???????????????????????????
    ???? ????????? ???????????? ????????????????????
    ???????????????????????
  • ??????????????????? (Defect Log) ??????????
  • Date ??????????????????
  • Number ??????????????????????
  • Type ???????????????????
  • Inject ????????????????????
  • Remove ??????????????????????????????
  • Fix Time ??????????????????????????????

23
??????????????????? (Defect Recording)
  • ??????????????????? (Defect Log) (???)
  • Description ??????????????????????????????
  • Fix Defect ?????????????????????????
    ????????????????? Defect ????????
    ?????????????????? Number ??? Defect ????????
    ????????????? Defect ????

24
Defect Type Standard
25
???????????????????? (Size Measurement)
  • ???????????????????????????????????
    ??????????????????????????????????????????
    ??????????????????????????????? (Line of Code)
    ?????????????????? ???????????????????????????????
    ?????????????????? (Effort) ????
  • Productivity ??? LOC per Hour
  • Defect Density ??? ???????? Defect per KLOC

26
Type of LOC
  • ?????????????????????????????? LOC
    ???????????????????? 6 ?????? ????????????

27
????????????????? (Project Plan Summary)
  • ???????????????????????????? Project Plan Summary
    ???????????????????????????????????? ??????????
    Program Size, Time in Phase, Defect Injected ???
    Defect Removed.
  • ??????????????????????????????????
    ?????????????????????? ???????????????????????
    (Baseline) ?????????????????

28
?????????????? (PSP Derived Measures) (1/3)
  • ??????????????? ?????????????????????????????
    ?????????????? (Measures) ??????? 4 ??????????
    ??????????
  • Program Size
  • Time in Phase
  • Defect (Quality)
  • Schedule
  • ?? PSP ?? Derived Measures (??????????????????????
    ????) ???????? ????
  • Productivity
  • Defect Density

29
?????????????? (PSP Derived Measures) (2/3)
  • Delta Time ??? ????????????????????????????????
    Phase ???????????????????????????????
    Interruption time
  • Total Time ??? ??????????????????????????? Phase
  • Productivity ??? Size (LOC) / ????????????????????
    ????? (Hour)
  • Estimate Accuracy ??? ????????????????????????????
    ????????????????? ??????????????????????
    ((Actual Estimate) 100) / Estimate
  • Defect Density ??? ????????????? 1,000 LOC
    Defect / KLOC
  • Review Rate ??? ????????????????????????????????
  • (LOC 60) / Review in Minute

30
?????????????? (PSP Derived Measures) (3/3)
  • Yield ??? ??????????????????????????????????????
  • Phase Yield ????????????????????????????????????
    ???? Phase ????
  • (Defect Removed in Phase / Total Defect
    Injected in Phase)
  • Process Yield ??????????????????????????????????
    ??????????? Compile ????????
  • (Defect Removed before Compile / Total Defect
    Injected before Compile)
  • Total Cost of Quality (COQ) Appraisal COQ
    Failure COQ
  • Appraisal COQ ((Design Review Code Review)
    100 ) / Total Time
  • Failure COQ ((Compile Test) 100) / Total Time

31
????? / ???????????????? PSP (1/2)
  • ?????
  • ??????????????????????????????????? 2.5 ????
  • ?????????????????????????? 1.75 ????
  • ?????????????????? ??????????????????????????????
    Compile ???????????????? 50
  • ??????????? Defect ????????? Unit Test ?????????
    2.5 ????
  • Productivity (LOC/Hour)

32
????? / ???????????????? PSP (2/2)
  • ???????
  • ??????????????? ?????????? ??????????
    ???????????????????????????????
    ??????????????????????????????????????
    ????????????????????????? ????????????????????????
  • ???????????????????????
  • ????????????????? ??????????
  • ????????????????????????
  • ??????????????????????????? PSP

33
????
  • ?????????????? ???????????????????????????????????
    ? ???????????? ???????????????????????????????
    ?????????? ???????????????????????????????????????
    ???? ??????????????????????????????
  • ?????????? ??????????????????????? ????????
    ??????? ?????????????? ???????????????????
    ???????????????? ?????????? 8 ??????????????
    ?????????????????? ?????????????
  • ????????? (??????? ??????????? ??????????????????
    ????????????????????????)
  • ?????????????????????????????? ???????????????????
    ????? ??????????????? (????????? ?????????)

34
References
  • Ian Sommerville. Software Engineering 8th
    Edition. Addison Wesley Publishers., 2007
  • Watts S Humphrey. A Self Improvement Process for
    Software Engineers. Addison Wesley Professional.,
    2005
  • Software Engineering Institute Carnegie Mellon.
    online http//www.sei.cmu.edu/., 2010
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