SDLC(System Development Life Cycle) And Note On Its Phases

SDLC(System Development Life Cycle) And Note On Its Phases

SDLC stands for (system development life cycle).It is a set of different steps that are performed to develop a system.It is an organized way of developing successful systems.It consists of Different Phases.The phases are as follows:

Types Of SDLC:

1. Preliminary Investigation
2. System Analysis
3. System Design
4. System Coding
5. System Testing
6. System Implementation
7. System Maintenance

Preliminary Investigation:

Preliminary investigation is the first phase of SDLC. In this phase of SDLC,the system Development is investigated.The objective of this phase is to conduct an initial analysis and finding of system as follows:

• System Identification
• System Scope
• Alternative Solution
• Feasibility Study
• Preliminary Plan

System Analysis:

In this Phase, the current business system is studied in detail to find out how it works and how to improve it.The conduct the following activities:

• Need Analysis
• Data Gathering
• Data Analysis
• Analysis Report

System Design:

System Design phase is used to design logically and physically model of new system for development of system.The system design states how is possible to design a new system and how will meet the requirement identified in analysis phase.

System Coding:

This phase consist of writing programs for the system.Single programmer or a team of programmers develop the system using different tools.This phase requires a lot of time,effort and budgets to develop the complete system.

System Testing:

Complete testing of the system Developing is very important phase.It is 5th phase of System Developing.A system must be tested to detect and remove errors From it.The system developing is tested by giving sample data of system developing.

System Implementation:

Implementation consist of installing the hardware,Software And files.A system can be implemented after it has been tested.It is also called system conversion.It can be performed in any of the following ways:

• Direct Implementation
• Parallel Implementation
• Phased Implementation
• Pilot Implementation

System Maintenance:

Maintenance is process of checking the working of the system.It is very important to ensure that the system is fulfilling the objectives. Some measures may be taken to improve the new system.System Maintenance includes the following activities:

• Correcting the problems in the system.
• Updating the system to fulfill new requirements.
• Improving the working of system etc.