System Development life cycle: Design, Implementation, Testing
Design
Implementation
Testing
Stages of testing
Beta testing
Implementation testing
Alpha testing
Types of implementation
Parallel
Phased
Direct
Pilot
Factors in Design
Input/Output methods
Data/File structures, field/table structures etc.
Hardware/Software required
Acccess rights
Number of computers to be linked
Compatibility with other systems
Ease of accessiblity
Also known as the big bang method, involves the immediate switch over to a new system with all devices at the same time.
Advantages
Disadvantages
Staff may not understand the new system.
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If there is a major problem there is now no backup.
No incompatibility problems with older systems
No need to maintain older system
Immediate access to new functions