SDLC & PADIS
- Annas Alharbi
- Feb 10, 2017
- 2 min read
SDLC:
(System Development Life Cycle) is conceptual. Defines “phases” or general types of work to be done on an IS project. These phases are essentially building blocks --sets of activities required to build systems.
PADIS:
•Planning
Why & Should we build the system?
Determine problem, feasibility, schedule, resources
•Analysis
What must the system be able to do?
Determine business requirements
•Design
How will the system work?
Determine solution—architecture, interface, networks, database, controls
•Implementation
Construct, test, install, train system
•Support
Maintain & upgrade system
Story of a New System:
Planning:
If there is an existing system, its deficiencies are identified and new needs raised … by interviewing users and support personnel.
If change is needed, plans are created and decision made … by clarifying for decision makers the benefits, scope, risks and resources needed.
2. Analysis:
New system requirements are defined to address existing deficiencies and new needs … by specifying proposals for improvement.
Proposals are broken down into specific new designs for the proposed system … by detailed planning to address hardware, interface, programming, data, and security issues.
3. Design:
Proposals are broken down into specific new designs for the proposed system … by detailed planning to address hardware, interface, programming, data, and security issues.
4. Implementation:
The new system is developed …by obtaining, configuring, constructing the components and programs.
Preparations for operating the system are made… by testing all aspects of the system, training users, documenting operations. Adjustments are made as needed.
The system is put into use … by shutting down the old system, transferring the data, and starting the new (or various other strategies)
5. Support:
After the new system is running it is kept effective… by exhaustively evaluating it, by installing upgrades making changes to keep it up to date with organizational changes.
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