Chapter02 process RPL

1These courseware materials are to be used in conjunction with Software Engineering: A Practitioner’s Approach, 5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001

Chapter 2Chapter 2The The

ProcessProcess


Software Engineering

A Layered A Layered TechnologyTechnology

Software Engineering

a “quality” focusa “quality” focusprocess modelprocess model

methodsmethodstoolstools


A Common Process A Common Process FrameworkFramework

Common process frameworkCommon process frameworkFramework activitiesFramework activities

work taskswork taskswork productswork productsmilestones & deliverablesmilestones & deliverablesQA checkpointsQA checkpoints

Umbrella ActivitiesUmbrella Activities


Umbrella Umbrella ActivitiesActivities

Software project managementSoftware project management Formal technical reviewsFormal technical reviews Software quality assuranceSoftware quality assurance Software configuration Software configuration

managementmanagement Document preparation and Document preparation and

productionproduction Reusability managementReusability management MeasurementMeasurement Risk managementRisk management


Process as Problem Process as Problem SolvingSolving

statusquo

problemdefinition

technicaldevelopment

solutionintegration


The Process The Process Model:Model:

AdaptabilityAdaptability the framework activities will the framework activities will alwaysalways be applied on be applied on everyevery project ... BUTproject ... BUT

the tasks (and degree of rigor) for the tasks (and degree of rigor) for each activity will vary based on:each activity will vary based on:

the type of project (an “entry point” to the type of project (an “entry point” to the model)the model)

characteristics of the projectcharacteristics of the project common sense judgment; concurrence of common sense judgment; concurrence of

the project teamthe project team


The Primary The Primary Goal:Goal:

High QualityHigh QualityRemember:Remember:

High quality = project timelinessHigh quality = project timeliness

Why?Why?

Less rework!Less rework!


The Linear The Linear ModelModel

analysis design code test

System/informationengineering


Iterative Iterative ModelsModels

listento

customerbuild/revisemock-up

customertest-drivesmock-up

businessmodeling

datamodeling

processmodeling

applicationgeneration

testing&

turnover

businessmodeling

datamodeling

processmodeling


testing&

turnover

businessmodeling

datamodeling

processmodeling


testing&

turnover

team #1

team #2team #3

60 - 90 days

Prototyping

RAD


The Incremental The Incremental ModelModel


System/informationengineering




increment 2

increment 3

increment 4

increment 1

delivery of1st increment

delivery of2nd increment

delivery of3rd increment

delivery of4th increment

calendar time


An Evolutionary (Spiral) An Evolutionary (Spiral) ModelModel

CustomerCommunication

Planning

Construction & ReleaseCustomerEvaluation

Engineering

Risk Analysis


Still Other Process Still Other Process ModelsModels

Component assembly modelComponent assembly model—the process to —the process to apply when reuse is a development objectiveapply when reuse is a development objective

Concurrent process modelConcurrent process model—recognizes that —recognizes that different part of the project will be at different part of the project will be at different places in the processdifferent places in the process

Formal methodsFormal methods—the process to apply when a —the process to apply when a mathematical specification is to be developedmathematical specification is to be developed

Cleanroom software engineeringCleanroom software engineering—emphasizes —emphasizes error detection error detection beforebefore testing testing

Chapter02 process RPL

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