CASETools.ppt

8/18/2019 CASETools.ppt

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©Ian Sommerville 2004 Software Engineering, 7th edition. Chapter 8 Slide 1

Tools of Software Development

2 types of tools used by software

engineers:1. Analytical tools

– Stepwise refinement

– Costbenefit analysis

– Software metrics

2. CAS! tools


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CAS! "ComputerAided Software

!ngineering# Tools

Software t$at is used to support software

process activities

%rovides software process support by& automating some process activities

& providing information about t$e software

being developed Currently used in every p$ase'wor(flow of

life cycle


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CAS! Tools

)enefits& *mprove software +uality

& !nforce discipline

& ,elp communication between developmentteam members

& *nformation is illustrated t$roug$ diagrams t$at

are typically easier to understand

& Development information is centrali-ed


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CAS! Tools

)enefits& eduction of time and effort

& Tas(s are muc$ faster to complete and alter

& !n$ance reuse of models or models/

components

& Can reduce maintenance costs


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CAS! Tools

%roblems& 0imitations in fleibility of documentation

& a3or danger: completeness and syntactic

correctness does 45T mean compliancewit$ re+uirements

& Costs associated wit$ t$e use of t$e tool

& %urc$ase price

& Training


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6 Categories of CAS! Tools

Tools

7or(benc$es

!nvironments


7/29©Ian Sommerville 2004 Software Engineering, 7th edition. Chapter 8 Slide 7


Tools

& Support individual process tas(s

& !amples:& C$ec(ing t$e consistency of a design

& Compiling a program

& Comparing test results



CAS! Tools

8pperCAS! tools "frontend tools#& Assist developer during re+uirements9

analysis9 and design wor(flows or activities

0owerCAS! tools "bac(end tools#& Assist wit$ implementation9 testing9 and

maintenance wor(flows or activities

*ntegrated CAS! tools "*CAS!#

& provide support for t$e full life cycle




7or(benc$es& Collection of tools t$at toget$er support:

& %rocess wor(flows "re+uirements9 design9 etc.#

& 5ne or two activities w$ere an activity is a relatedcollection of tas(s.

& Commercial eamples:

& %ower)uilder & Software T$roug$ %ictures

& Software Arc$itect




!nvironments

& Support t$e complete software process or9 at

least9 a large portion of t$e software process

& 4ormally include several different

wor(benc$es w$ic$ are integrated in some

way



Taonomy of CAS! Tools



Components of CAS!

CAS!

repositoryDocument

enerator

Designenerator

Analysistool

Code

enerator

Drawing

Tool

!rrorc$ec(ing

tool

Security and

;ersion Control

Screen and

eport enerator

%rototyping

Tool

Database

enerator



Components of CAS!

CAS! repository

& Central component of any CAS! tool

& Also (nown as t$e information repository or

data dictionary



Components of CAS!

CAS! repository& Centrali-ed database

& Allows easy s$aring of information between

tools and SD0C activities& 8sed to store grap$ical diagrams andprototype forms and reports during analysisand design wor(flows

& %rovides wealt$ of information to pro3ectmanager and allows control over pro3ect

&



Components of CAS! CAS! repository acts as:

& *nformation repository& Combines information about organi-ation/s

business information and application portfolio

& %rovides automated tools to manage and controlaccess

& Data dictionary& 8sed to manage and control access to information

repository

&



Components of CAS!

Diagramming tools

& Allow you to represent a system and its

components visually

& Allows $ig$er level processes to be

easily decomposed

& Can eamine processes or data models

at $ig$ or low level



Components of CAS!

Screen and report generators

& 8sed to

& Create9 modify and test prototypes of

computer displays and reports

& *dentify w$ic$ data items to display or collect

for eac$ screen or report

& Some tools $ave templates


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Components of CAS!

Analysis tools& enerate reports t$at $elp identify possible

inconsistencies9 redundancies and

omissions& enerally focus on

& diagram completeness and consistency

& data structures and usage


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Components of CAS!

CAS! documentation generator tools& Create standard reports based on contents of

repository

& 4eed tetual descriptions of needs9 solutions9 trade

offs9 diagrams of data and processes9 prototypeforms and reports9 program specifications and user

documentation

& ,ig$+uality documentation leads to =>? reduction

in system maintenance effort in comparison toaverage +uality documentation


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CAS! wor(benc$es

A co$erent set of tools t$at is designed tosupport related software process activitiessuc$ as analysis9 design or testing.

Analysis and design wor(benc$es supportsystem modelling during bot$ re+uirementsengineering and system design.

T$ese wor(benc$es may support a specific

design met$od or may provide support for acreating several different types of systemmodel.


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An analysis and design wor(benc$

Central

information

repository

Code

generator

Query

language

facilities

Structured

diagramming

tools

Data

dictionary

Report

generation

facilities

Design, analysis

and checking

tools

Forms

creation

tools

Import/export

facilities


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Analysis wor(benc$ components

Diagram editors

odel analysis and c$ec(ing tools

epository and associated +uery language

Data dictionary

eport definition and generation tools


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Computeraided software

engineering

Computeraided software engineering "CAS!# is

software to support software development and

evolution processes.

Activity automation& rap$ical editors for system model development@

& Data dictionary to manage design entities@

& rap$ical 8* builder for user interface construction@

& Debuggers to support program fault finding@& Automated translators to generate new versions of a

program.


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Case tec$nology

Case tec$nology $as led to significant

improvements in t$e software process.

,owever9 t$ese are not t$e order of magnitude

improvements t$at were once predicted& Software engineering re+uires creative t$oug$t

t$is is not readily automated@

& Software engineering is a team activity and9 for

large pro3ects9 muc$ time is spent in teaminteractions. CAS! tec$nology does not really

support t$ese.


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CAS! classification

Classification $elps us understand t$e different types

of CAS! tools and t$eir support for process activities.


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Activitybased tool classification

Specifcation Design Implementation erifcation

and

alidation

Re!engineering tools

"esting tools

De#ugging tools

$rogram analysis tools

%anguage!processing

tools

&ethod support tools

$rototyping tools

Confguration

management tools

Change management tools

Documentation tools

'diting tools

$lanning tools


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CAS! integration

Tools& Support individual process tas(s suc$ as design

consistency c$ec(ing9 tet editing9 etc.

7or(benc$es& Support a process p$ase suc$ as specification ordesign9 4ormally include a number of integratedtools.

!nvironments

& Support all or a substantial part of an entiresoftware process. 4ormally include severalintegrated wor(benc$es.


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Tools9 wor(benc$es9 environments

Single!method

(ork#enches

)eneral!purpose

(ork#enches

&ulti!method

(ork#enches

%anguage!specic

(ork#enches

$rogramming "esting*nalysis anddesign

Integrated

en+ironments

$rocess!centred

en+ironments

File

comparatorsCompilers'ditors

'n+ironmentsork#enches "ools

C*S'

technology

Documents

CASETools.ppt