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

CODING  Transforming designs to working systems TESTING  Finding the errors and correct them INSTALLATION  System is introduced to users DOCUMENTATION  Giving users guide SUPPORTING  Giving 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