Answer:
The system lifecycle is the oldest method for building information systems and is used today for medium or large complex systems projects. The lifecycle for an information system has stages:
- Project definition
- Systems study
- Design
- Programming
- Installation
- Post implementation.
The lifecycle methodology divides systems development in to formal stages with specific milestones and products at each stage.
Stages of the Systems Lifecycle
The project definition stage determines whether the organization has a problem and whether that problem can be solved by building a new information system or by modifying an existing one.
The systems study stage analyzes the problems of existing systems in detail, identifies objectives to be attained by a solution to these problems, and describes alternative solutions.
The design stage produces the design specification for the solution. The lifecycle emphasizes formal specifications and paperwork, so many design documents are generated during this stage.
The programming stage translates the design specifications produced during the design stage into software program code. Systems analysts work with programmers to prepare specification for each program in the system.
The installation stage consists of the final steps to put the new or modified system into operation: testing, training, and conversation.
The post-implementation stage consists of using and evaluating the system after to is installed and is in production.
Limitations of the Lifecycle Approach
The system lifecycle is still useful for building large complex systems that require a rigorous and formal requirement s analysis, predefined specifications, and tight controls over the systems- building process.
