Computer Based Systems
The system development cycle is a method used to create a system where none has existed before and/or modify an existing system. It is sometimes simply called System Development.It involves a number of stages representing a standard strategy for taking a problem from start to finish.1. Conservative-working systematically through the steps.2. Radical-Cycling through the cycle several times until the final result is achieved.The above diagram shows that the system development cycle is represented by 5 broad stages:Requirements analysis or..........Feasibility study.-Duration is relatively short compared to the rest of the development cycle.-It is important to get it right the first time else mistakes could be costly. In the worst case a large oversight would require starting over from step one.The aim of this stage is to see how the present system functions and to identify the nature of the problem (problem definition). once the problem has been identified a report is com
(5) a general specification and preliminary suggestion for a problem solution. The analyst seeks to purchase software that is already available or create their own custom software and have a programmer write one for them. Once again management may choose to get a second opinion or follow the recommendation and go to the design stage. control should be built into the system to make sure data is safe and correct (is an issue of data integrity). Were interviews conducted with staff involved). Data gathering What tasks are occurring, who is performing them, when are the tasks being performed. why a mail order firm takes longer than a week to dispatch orders). Exercise: Create an organization chart for either - (1) The school(2) Some other organization you know. For most systems the following areas should be covered:(1) output requirements-How is output to be presented? e. Dates for specific stages are set and these are used to control the development process. A Pie chart is much easier to interpret than a set of numbers. It is used to manage information resources and is particularly useful when working with databases e.
Common topics in this essay:
Output Availability,
Definition Requirements,
Questionnaires Closed,
Analysis Aim,
System Development,
Data Dictionaries,
Input Method,
Exercise Create,
Flow Diagrams,
Development Cycle,
system development,
development cycle,
system development cycle,
initial study eg,
detailed analysis,
closed questions,
report report,
data dictionaries,
flow diagrams,
system analyst,
data flow diagrams,
study eg,
statistical graphs,
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Acceptance Essays
