Unit 7 The System Life Cycle
Analysis:Find and Describe methods of researching existing system
Advantage and Disadvantage of the different methods
Design:Describe how is it needed to design document
Development and Testing:Describe how data/file structures are created and testest
Validation
Feasibility study
Terms of reference
Documentation:identify the components of technical documentations (e.g purpose of the system/ program limitations of the system
Design
Range Check:Checks whether data is within given
Look-up check:this checks whether the data entered exists and is stored in a table of data
Length check:checks if the input data contains the required number of characters
Character/type check:checks that the input data doesn't contain invalid characters
Format/picture check:checks that data is in a specific format
Presence check:checks if data is actually present and hasn't been missed out
Consistency check:checks if corresond with each other
Check digit:this is an extra digit added to a number a which is calculated from the digits
Design the data caputre forms
Design the screen layouts
Design outputs in the form of screen displays and printed reports
Produce systems flowcharts and/or pseudo code
Select/design validation rules that need to be used
Design/agree on file structures
Produce any algorithms or program flowcharts
Design a testing strategy/plan
Objectives,Constraints,Boundaries
Description of existing system
identify problems,projected costs
Criteria
essential requirements,desirable features
Proposed solution
development plan,cost-benefit analysis