SDLC and its phases system development life cycle

SDLC
SYSTEM DEVELOPMENT LIFE CYCLE
Sdlc phases
1. Preliminary investigation
System identification
system scope
alternative solutions
feasibility study
preliminary plan
2. System analysis
Need analysis
data gathering
data analysis
analysis report
3. System design
Logical design
physical design
4. System coding
5. System testing
Unit testing
system testing
6. System implementation
Direct
Phased
Parallel
Pilot
7. System maintenance

1. SDLC and its Phases Discussing different phases of the System Development Life Cycle

2. What is SDLC? 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.

3. 1. Preliminary Investigation Preliminary investigation is the first phase. In this phase, the system is investigated. The objective of this phase is to conduct an initial analysis and findings of system as follows: System Identification System Scope Alternative Solutions Feasibility Study Preliminary Plan

4. 2. 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 analyst conducts the following activities: Need Analysis Data Gathering Data Analysis Analysis Report

5. 3. System Design The system design states how new system will meet the requirement identified in analysis phase. System design phase is used to design logical and physical model of new system.

6. 4. System Coding This phase consists of writing programs for the system. Single programmer or a team of programmers develops the system using different tools. This phase requires a lot of time, effort and budget to develop the complete system.

7. 5. System Testing Complete testing of the system is very important. A system must be tested to detect and remove errors in it. The system is tested by giving sample data.

8. 6. System Implementation Implementation consists 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

9. 7. System Maintenance Maintenance is a 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 system. Maintenance includes the following activities: Correcting the problems in the system Updating the system to fulfill new requirements Improving the working of the system etc.