SDLC-S/W Development Life Cycle

SDLC or SOFTWARE PROCESS

It is a structured & organized approach in which we go for life cycle of software. How a s/w starts & develops & ends.

It has several phases start with …         

1>Feasibility Study:- The analysts conducts an initially study of the problem & ask is the solutions.

Ø  Is software is technologically possible?

Ø  Is software is economically possible?

Ø  Is software is Legally possible?

Ø  Is software is Operationally possible?

2>Requirement Analysis:-

Ø  Business requirements are gathered in this phase.

Ø  Meetings with managers, Stake holders & users are held in order to determine the requirements.

Ø  Who is going to the system?
How will they use the system?
What data should be input into the system?
What data should be o/p by the system?
These are the general question asked during a requirement gathering phase.

Ø  This produces a nice big list of functionality that the system should provide, which describes functions the system should perform, business logic that process data, what data is stored & used by the system & how the user interface should work.

Ø  The overall result is the system as a whole & how it performs, not how it is actually going to do it.

3>Design:-

Ø  The s/w system design is produced from the results of the requirements phase.

Ø  This is where the details on how the system will work is produced.

Ø  Architecture, including h/w, s/w, communication, s/w design are all part of the deliverables of a design phase.

Ø  Design Document that consists of Architectural Design, Database Design & Interface design.

4>Implementation:-

Ø  Code is produces from the deliverables of the design phase during Implementation.

Ø  This is the longest phase of the SDLC.

Ø  If the design is performed in a detailed manner, code generation can be accomplished without much complication.

5>Testing:-

Ø  During testing, the implementation is tested against the requirements to make sure that the product is actually solving the needs addressed & gathered during the requirement phase.

6>Installation & maintenance:-

Ø  During Installation, the s/w is deployed to customer site & it ready to use by the customer.

Ø  The s/w will definitely undergo change once it is delivered to the customer.

Ø  The software should be developed to accommodate change that could happen during the post implementation period.