SDLC

Shree Manibhai Virani and Smt. Navalben Virani Science College, Rajkot (Autonomous)

Affiliated to Saurashtra University, Rajkot

Ms.Ripal RanparaAssistant Professor,

Department of Computer Science & Information TechnologyShree M.N. Virani Science College Rajkot

SDLC

SystemDeveloment

LifeCycle

System developmentMeans analysis, design.

WHEN SDLC

IS REQUIRED

=>Evolving environmental changes such as Competition.

=>Present system does not satisfy the users information needs.

=>Present system no longer efficiently and effectively meets the Goals of organization.

=>Excessive time spent in correcting errors.Current Reports / Outputs not meting users decision making skills.

=>Escalating customer and vendor complaints.

DETAILED INVESTIGATION

OF PRESENT SYSTEM

1.PRILIMINARY INVESTIGATION

2.DETERMINATION OF SYSTEM REQ.

3.DESIGN OF SYSTEM

4.DEVELOPMENT OF SOFTWARE

5.SYSTEM TESTING

6.IMPLEMANTATION,EVALUATION,MAINTENANCE

PRIMARY INVESTIGATION:request(from manager to director)

clarification(from employee & user)

feasibility(possibility) study*technical feasibility*economic feasibility

*operational feasibility

DETERMINATION OF SYSTEM REQ.

how frequently does it occur?

If a problem exists,how serious is it?

how is it being done?

what is being done?

DESIGN OF SYSTEM

Logical design on paper(just a road map)

DEVELOPMENT OF

SOFTWARE

(programmer is responsible forDevelopment of software)

SYSTEM TESTING

(carry out the final system testAnd formal approval and acceptance

By user and management)

IMPLEMENTATION

To check out and put newEquipment into use and

Train user, install new application

EVALUATIONTo examine strength and

Weakness of system.

MAINTEANACE

(Is necessary to eliminateError in working system

During its working)