Stages in the System Development Life Cycle
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System Analysis - Stages in the System Development Life Cycle
By: Administrator; Date Added.: Feb 18, 2010; Category: System Analysis
Stages in the Systems Development Life Cycle
The systems life cycle models the stages involved in developing an Information technology system. The system life cycle may be looked at as a 7 phase- problem solving procedure.
These stages are:
* Preliminary Investigation
* System Analysis
* System Design
* System Development
* System Implementation
* System Maintenance
This is the first stage of the system life cycle and it involves finding out all about the existing system. Problems (limitations) with the existing systems are determined, and possible solutions are identified. This leads to a feasibility study which involves, costing, timescales, hardware and software requirements and staffing issues.
This stage is often referred to as the preliminary investigation stage, in which case the problems are defined, the scope of the system is determined, alternative solutions are suggested and a short report is produced.
Within this stage, data is collected and a deeper look (study) of the existing system is done. Data collection may be done through observation, interviews, document analysis and questionnaires.
Modeling tools are then used to analyze the system and new requirements are defined.
Modeling tools may include checklists, structural diagrams such as top-down analysis methodology, flow charts, grid charts and decision tables. Others are automated design tools such as computer-aided software engineering tools (CASE) which help system analysts to evaluate hardware and software alternatives.
At the end of this analysis, findings are documented. The documentation of these findings...