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Chapter 1 system analysis, Object oriented steps - Coggle Diagram
Chapter 1 system analysis
SDLC-process of determine how information system support business needs,design system and deliver to users.
System-set of interrelated components work together to achieve objective
SDLC
1)System planning
2)System analysis
3)System design
4)System implementation
5)System security &support
1)Planning-preliminary investigation report
project initiation-prepare system request
-perform possible early analysis
Set-up the project
Project plan and staff plan
2)analysis-system requirements document
collect &analyze requirements
prepare &present system proposal
Summarize results analysis phase
decision made by steering commitee
determine analysis strategy
Study problem from existing system
3)design-design spec
determine design strategy
design system components (interface,database)
present to steering commitee
4)implementation-functioning system
System construction-built &tested system
installation-install new system
IMPLEMENTATION STEPS
support plan-include post implementation review &identify system changes
5)security-fully operational system
most information need to be updated significantly or replaced after several years
System Development approach
Data Based
(Data oriented approach
undefined systems process
define all needed data attributes
System analyst determine with user how system used
Object
(oriented approach
Classes-set objects share common structure& behaviour
Inheritance-objects receive attributes and operations from other objects
Polymorphism-ability of object respond and implement each object
1)identify object class
2)identify relationships
3)identify attributes
4)determine inheritance relationships
5)Build class hierarchy->order
->transaction process
->tools inventory
Process-Oriented Approach
Based upon stable Set of input,process&output
Transactions based applications
Components in the system
Data
People
Software
Process
Hardware
Object oriented steps