Personal software Personal software processprocess

Mohammed ahmed Mohammed ahmed aliali

What is pspWhat is psp

The personal software process (psp) is a The personal software process (psp) is a structured set of process descriptions, structured set of process descriptions, measurements and methods that can measurements and methods that can help engineers improve their personal help engineers improve their personal performance performance

The goal of the personal software The goal of the personal software process is to discipline software processprocess is to discipline software process

PSP evolutionPSP evolution

►The personal software process has The personal software process has been developed by Watts Humphrey been developed by Watts Humphrey and software engineering institute and software engineering institute (sei). (sei).

►The research work on the psp was The research work on the psp was started in 1989.it resulted in a process started in 1989.it resulted in a process model which proved to be very model which proved to be very beneficial for software engineersbeneficial for software engineers

Benefits of PSPBenefits of PSP

► It helps the software engineers in It helps the software engineers in developing high quality software developing high quality software productsproducts

► It guides the engineer for personal It guides the engineer for personal improvementimprovement

► It gives the confidence to do the job the It gives the confidence to do the job the way you know you shouldway you know you should

►The psp gives the command over your The psp gives the command over your workwork

PSP processPSP process

The psp introduces process concepts in The psp introduces process concepts in a series of steps. Each step includes all a series of steps. Each step includes all the elements of the prior steps the elements of the prior steps together with one or two additions. As together with one or two additions. As shown in the figure belowshown in the figure below

PSP 3Cycle development

PSP2Code reviews

Design Reviews

PSP2.1Design template

PSP1Size estimating

Test report

PSP0Current processTime recording

Defect recordingDefect type standard

PSP0.1Coding standard

Size measurementProcess improvement

Proposal

PSP1.1Task planning

Schedule planning

The Cyclic personal process

Personal Quality Management

Personal Planning

The Baseline Personal Process

Personal software process

The engineers follow methods from The engineers follow methods from PSP0 to PSP3 while working on the PSP0 to PSP3 while working on the software with each level they are software with each level they are introduced to different methods which introduced to different methods which let them know and measure their let them know and measure their performance. The psp consists of performance. The psp consists of following processesfollowing processes

Base line personal process (PSP0)Base line personal process (PSP0) Personal planning process (PSP1)Personal planning process (PSP1) Personal quality management (PSP2)Personal quality management (PSP2) Cyclic personal process (PSP3)Cyclic personal process (PSP3)

Baseline personal process Baseline personal process (PSP0)(PSP0)

► It establishes the baseline for It establishes the baseline for measuring the progress and to define a measuring the progress and to define a foundation on which to improvefoundation on which to improve

►Psp0 has three phases that is planning, Psp0 has three phases that is planning, development and postmortemdevelopment and postmortem

►The planning and development phase The planning and development phase includes plan, design, code, compile includes plan, design, code, compile and testand test

► In postmortem a comparison of actual In postmortem a comparison of actual performance with the plan is made. performance with the plan is made. This provides a basis for measuring This provides a basis for measuring progress and defines a foundation on progress and defines a foundation on which to improvewhich to improve

►Psp0.1 defines coding standard, size Psp0.1 defines coding standard, size measurement and personal measurement and personal improvement proposalimprovement proposal

Plan

Design

Code

Compile

Test

Postmortem

Documents

Fix and logAll defects

Found

Records ofActual time,Defect andSize data of plan

Logs

Project PlanSummary

Baseline personal process

Personal planning Personal planning process(psp1)process(psp1)

►Psp1 and psp1.1 focus on personal project Psp1 and psp1.1 focus on personal project management techniques, introducing size management techniques, introducing size and effort estimating, schedule planning and effort estimating, schedule planning and schedule tracking methodsand schedule tracking methods

►Size and effort estimates are made using Size and effort estimates are made using PROBE (PROxy Based Estimating) methodPROBE (PROxy Based Estimating) method

►With PROBE engineers use the relative size With PROBE engineers use the relative size of proxy to make their initial estimateof proxy to make their initial estimate

Personal quality Personal quality management(psp2)management(psp2)

►Psp2 introduces defect management. Psp2 introduces defect management. This phase adds personal design and This phase adds personal design and code reviews and quality management code reviews and quality management and evaluation to psp1and evaluation to psp1

►There are two tasks involve in psp2 they There are two tasks involve in psp2 they are code review and design revieware code review and design review

►Code review: whose goal is to improve Code review: whose goal is to improve the quality of the software by reviewing the quality of the software by reviewing the program and its associated the program and its associated documentationdocumentation

►Design review: whose task is to verify Design review: whose task is to verify program logic, verify function use, program logic, verify function use, ensure that requirements, specifications ensure that requirements, specifications are completely covered by the designare completely covered by the design

►The psp2.1 introduces design The psp2.1 introduces design completeness and design verificationcompleteness and design verification

►The psp2.1 adds four design templates The psp2.1 adds four design templates and design verification systems. This and design verification systems. This improves the design process and design improves the design process and design verificationverification

Cyclic personal process Cyclic personal process (psp3)(psp3)

►This is the final step of psp. Till now This is the final step of psp. Till now what we have discussed is about what we have discussed is about related to small programsrelated to small programs

►Psp3 is used for large programs the Psp3 is used for large programs the technique is to divide the larger technique is to divide the larger programs into small programs of psp2.1 programs into small programs of psp2.1 size then psp3 combines multiple size then psp3 combines multiple psp2.1 process into large scale software psp2.1 process into large scale software developmentdevelopment

►This is a iterative processThis is a iterative process

Requirements & Planning

High-level Design and Design Review

Cyclic Development

Postmortem

Specify Cycle

Development

Reassess Cycle

Finished ProductProject and Process Data

Specifications

Cyclic personal process

Thank youThank you