PROGRAMMING FOR BUSINESS(CTP 108)

PREPARED BY MERVE SEVGİLİ&AKIN KURŞAD SAM

SYSTEM DEVELOPMENT LIFE CYCLE(SDLC)

WHAT IS SDLC?METHODOLOGY

*Develop

*Maintain

*Replace information

Base on 3 principles:

1)-Procces

*Modeling software

2)-Product

*Modeling measurement

3)-People

*Management&human interactions

SDLC’s phases:Existing system—evaluated

*Deficiencies identified

*Done by—interwieving&consulting

Requirements—identified

*Deficiencies addressed

--with specific proposal

Proposal

*Plans—laid out

--physical contructions

--hardware,operating system

System

*Obtained &installed

*Tested

*if necessary—adding

Put into use

*Old system replaced

System up & run

*Maintanence keep-up

--rigously

PLANING

ANALYSING

DESIGN

IMPLEMENTATION

MAINTANENCE

Creating the information

Defining System To Be Developed

--Based on

*System prioritized

--System

*Identified

*Chosen

Project Scope

--Requirements defined

--Put scope project

PLANNING

PLANING Developing the project PLAN

-- All details completed

*WHO?

*WHEN?

Manging & Monitaring Plan

--Organization

*Stay on track

*Create project,milestones

*Add inital plan

ANALYSING

STRUCTRING REQUIREMENTS

REQUIREMENTS

DETERMINATION

Analysts design system

*From input

*output

*Screen Reports

*Database

*Computer Processes

Analysts convert solutions

*Logical Design

--Hardware

--Software

--Consantrace

*Business aspects

DESIGN

*Physical Design

--Overall highlevel Design

--Turning logical to physical

--Determine physical details

DESIGN

CODINGTransforming designs to working systems

TESTINGFinding the errors and correct them

INSTALLATIONSystem is introduced to users

DOCUMENTATIONGiving users guide

SUPPORTINGGiving education

Helping users

UPDATING

New versions of systems

New Documentatıons

New Trainings

SYSTEM DEVELOPMENT LIFE CYCLE

THE SOFTWARE PROCESS MODELS

*Waterfall Model

*Iterative Model

*Incremental Model

*Sprial Model