Systems Development Life Cycle - Definition, Investigation and Analysis
- Created by: lauren778
- Created on: 11-04-18 23:00
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- SDLC
- Definition
- The standard method that SW developers follow when making a computer system.
- It is a series of tasks, completed in sequence, which allows a SW solution to be developed
- Linear sequential approach
- Once a project has begun, it is impossible to change the requirements
- It is a series of tasks, completed in sequence, which allows a SW solution to be developed
- The standard method that SW developers follow when making a computer system.
- Investigation
- Feasibility Report
- Definition
- Report that considers the request for a new system from different perspectives, to determine whether it is worth the organisation undertaking the project.
- Should Include
- User requirements
- Definition of the scope of the current system
- Identification of problems with the current system
- Cost-benefit analysis of the new system
- Definition
- INCLUDE INVESTIGATION WHEN TALKING ABOUT ANALYSIS
- Feasibility Report
- Analysis
- Definition
- Mapping the existing system used by the organisation using various analysis tools
- Analysis Tools
- Data Flow Diagrams
- Use standard symbols to describe how data moves in a data processing system
- Uses objects to represent external or internal sources
- Use standard symbols to describe how data moves in a data processing system
- ER Diagrams
- Used to represent how different groups of data relate to each other
- Entities are people or things that the data is concerned with (eg. Customers or products)
- Attributes are the things about entities that will be stored (eg. First name, address, product number etc.)
- Used to represent how different groups of data relate to each other
- Data Flow Diagrams
- Follows the decision to create a new system on the basis of the Feasibility report
- Detail the existing system and further understand the user requirements
- Detailed job, often carried out by specialist systems analysts
- Poor analysis could mean that mistakes from the old system are repeated in the new system
- Definition
- Definition
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