Chapter 5 Mis Software Development Life Cycle

MIS - SDLC

SOFTWARE DEVELOPMENT

LIFE CYCLE

SDLC MODELS

• A number of SDLC models have been created: waterfall, fountain, spiral, build and fix, rapid prototyping, incremental, and synchronize & stabilize.

IMPORTANT ACTIVITIES IN SDLC

1. PLAN

2. ANALYSIS

3. DESIGN

4. DEVELOPMENT

5. TEST

6. IMPLEMENT

7. MAINTAIN

PLAN

DEFINE THE SYSTEM TO BE DEVELOPED

SET THE PROJECT SCOPE

DEVELOP THE PROJECT PLAN INCLUDING TASKS, RESOURCES, AND TIMEFRAMES

SYSTEM ANALYSIS

GATHER THE BUSINESS REQUIREMENTS FOR THE SYSTEM

SRS – SYSTEM REQUIREMENTS SPECIFICATIONS

DESIGN

DESIGN THE TECHNICAL ARCHITECTURE REQUIRED TO SUPPORT THE SYSTEM

DESIGN SYSTEM

FLOW CHART

DEVELOP PROGRAM

BUILD THE TECHNICAL ARCHITECTURE

BUILD THE DATABASE AND PROGRAMS

TEST / QC

WRITE THE TEST CONDITIONS

PERFORM TESTING OF THE SYSTEMS

QUALITY CHECK

IMPLEMENT

WRITE DETAILED USER DOCUMENTATION

PROVIDE TRAINING FOR THE SYSTEM USERS

MAINTAIN

BUILD A HELP DESK TO SUPPORT THE SYSTEM USERS

PROVIDE AN ENVIRONMENT TO SUPPORT SYSTEM CHANGES

THE COST OF FINDING ERRORS

MONEY VS. SDLC STEPS 60

50

40

30

CO

ST

20

10

0

PLAN DEVELOP MAINTAIN

STEPS TAKE TIME TO PLAN AND DO COMPLETE SYSTEM ANALYSIS AND DESIGN

IMPORTANT TERMS

PROTOTYPING - SIMULATE SYSTEM

POC – PROOF OF CONCEPT

SIGN OFF – USER ACCEPTANCE TEST AND SIGNATURE ON THE INPUT / OUTPUT / PROOF OF CONCEPT

PROJECT LEADER – PERSON IN CHARGE OF THE SOFTWARE TEAM

SOFTWARE DEVELOPMENT

CASE TOOLS

MIS FOR e-VERYONE • Banking & Finance

• Energy & Utilities

• Engineering

• FMCG

• Government bodies and Associations

• Insurance and Investment houses

• Media

• Medical & Healthcare

• Pharmaceuticals & Chemicals

• Services

• Telecommunications

• Travel & Transportation services

• Warehousing & Logistics SOFTWARE

BUSINES S OPTIMIZ ATIONIS A MUST FORALL KINDS O F BUSINES S

A flowchart is a schematic representation of an algorithm or a process.

Many software packages exist that can create flowcharts automatically

E.G. CASE TOOLS

SDLC & DFD

SDLC SOFTWARE DEVELOPMENT LIFE CYCLE

DATA FLOW DIAGRAM NOTATIONS

DFD

A data flow diagram illustrates the processes, data stores, and external entities in a business or other system and the connecting data flows

EXAMPLE

C.A.S.E.

• CASE is an acronym that stands for

Computer-Aided Software Engineering

• In simple layman terms, CASE is a tool which aids a software engineer to maintain and develop software.

WHY CASE TOOLS Architecture management: Model, design, and rapidly build SOFTWARE, systems, and computer applications programs

Change and release management: Improve software delivery and lifecycle traceability, from requirements through deployment

Software development management: Align projects for improved productivity and predictability

Quality management: Ensure software functionality, reliability, and performance throughout development and production

PURPOSE OF CASE TOOLS SOFTWARE Many CASEtools not only output code but also generate other output typical of various systems analysis and design methodologies

DATA FLOW DIAGRAMS (DFD)

ENTITY RELATIONSHIP DIAGRAMS (ERD)

USER DOCUMENTATION

CASE TOOLS HELPS IN CODE GENERATION

SOFTWARE