Lesson 2 Introduction to Personal Software Process

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Lesson 2Introduction to Personal Software Process

• www.ict.pyo.nu.ac.th/uthais/

KANOKWATT SHIANGJEN
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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)
  ????????????
• ?????? ??????????????????????????????
• ?????? ???????????????????????????????
• ?????? ??? ????? ????????? ????????????
  ????????????????????????????????
• ???????????????? ?????????????????????????????????
  ??????????
• ?????????????????? ??? ??????????
  ???????????????? ?????????????????

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??????????????????? PSP

• ??????????????? ?????????????????
  ???????????????????????????????????????????
  ?????????????????? ???????????????????????????????
  ???????? ??????????

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??????????????????? 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

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PSP 0

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

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PSP 0

• ??????????????
• Current Process ??????????????????????????????????
  ????????
• Time Recording ????????????? Time Log
• Defect Recording ????????????? Defect Log
• Defect Type Standard

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PSP 0.1

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

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PSP 1.0

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

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PSP 1.1

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

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PSP 2.0

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

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PSP 2.1

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

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PSP 3.0

• ??????????????????????????????????????????????????
  ???????????????????????????? ?????????????????????
  ? ???????????????? (Productivity)
  ??????????????????????????????????????????????????
  ?????????? ????????????????????????????????????
  ??????????????????????
• ??????? ??????????????????????????
  ??????????????????????????????????
  ????????????????? (Break-down) ???????????????????
  ????????????????????????????????????????????????

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?????????????????????? (1/3)

• Logs ??????????????????? ???? Time ??? Defect
  Log
• Instructions ??????????????????????
• Scripts ?????????????????????????????????
  ??????????
• Step ???????
• Purpose ????????????
• Entry and Exit Criteria ??????????????????? /
  ???????

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?????????????????????? (2/3)

• Forms and Templates ??? ??????????????????????????
  ???????????
• Form ???????????????????????????????? ??? Summary
  form ???????????????
• Templates ????????????????????????????????? ????
  Size Estimating Template, Test Report Template,
  Task and Schedule Planning Templates, PIP ???
  Design Templates

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?????????????????????? (3/3)

• Standards ?????????????????????????
  ??????????????????????????????????????????????????
  ?????????????????????????? ???? Defect Type
  Standard, Coding Standard ??? LOC Counting
  Standard
• Checklists ???????????????????
  ??????????????????????????????????????????????????
  ????? ???? Design Review Checklists ??? Code
  Review Checklists

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??????????????? (Measure)

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

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?????????????????????????? (Development Time
Measurement)

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

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????????????????????????????

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

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??????????????????? (Defect Recording)

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

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??????????????????? (Defect Recording)

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

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Defect Type Standard
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???????????????????? (Size Measurement)

• ???????????????????????????????????
  ??????????????????????????????????????????
  ??????????????????????????????? (Line of Code)
  ?????????????????? ???????????????????????????????
  ?????????????????? (Effort) ????
• Productivity ??? LOC per Hour
• Defect Density ??? ???????? Defect per KLOC

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Type of LOC

• ?????????????????????????????? LOC
  ???????????????????? 6 ?????? ????????????

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????????????????? (Project Plan Summary)

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

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?????????????? (PSP Derived Measures) (1/3)

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

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?????????????? (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

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?????????????? (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

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????? / ???????????????? PSP (1/2)

• ?????
• ??????????????????????????????????? 2.5 ????
• ?????????????????????????? 1.75 ????
• ?????????????????? ??????????????????????????????
  Compile ???????????????? 50
• ??????????? Defect ????????? Unit Test ?????????
  2.5 ????
• Productivity (LOC/Hour)

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????? / ???????????????? PSP (2/2)

• ???????
• ??????????????? ?????????? ??????????
  ???????????????????????????????
  ??????????????????????????????????????
  ????????????????????????? ????????????????????????
  
• ???????????????????????
• ????????????????? ??????????
• ????????????????????????
• ??????????????????????????? PSP

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????

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

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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