SYSTEMS DEVELOPMENT LIFE CYCLE

According to Wikipedia, The systems development life cycle (SDLC), also referred to as the application development life-cycle, is a term used in systems engineering, information systems and software engineering to describe a process for planning, creating, testing, and deploying an information system.The systems development life-cycle concept applies to a range of hardware and software configurations, as a system can be composed of hardware only, software only, or a combination of both.

STEPS

1. PLANNING

  • Systems request
  • IT requirements
  • Major request
    • New IS
    • Or Replacement of an Existing system
  • Minor Request
    • new feature or a change to the user interface
  • Preliminary Investigation

2. ANALYSIS

  • is to understand business requirements and build a logical model of the new system
  • Requirements Modeling
    • where you define and describe business processes
  • Interviews, Surveys, Observation and Sampling
  • System Requirements Document

3. DESIGN

  • is to create a blueprint for the new system that will satisfy all documented requirements
  • you identify all necessary outputs, inputs, interfaces, and processes
  • design internal and external controls
  • systems design specification

4. IMPLEMENTATION

  • the new system is constructed
  • programs are written, tested, and documented, and the system is installed
  • to deliver a completely functioning and documented information system
  • System Conversion
  • Training of Users
  • Actual transition of System

5. SYSTEM OPERATION AND SUPPORT

  • maintains and enhances the system
  • changes correct errors and adapt to changes in the environment
  • enhancement provide new features and benefits
  • to maximize return on the IT investment

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