Systems Development Phases
Seven phases of systems development life cycle.
Planning – This is the starting point of all development projects. In this phase we determine the desired outcome, outline the proposed system, develop a budget, and create a work schedule.
Systems Analysis – Once the planning phase is complete, the system analysis phase begins. We use the desired outcome from the planning stage to develop a data flow diagram to document what the system needs to do. This is a very important phase in the systems development life because a mistake in this phase could mean that you end up building a system that doesn’t create the desired outcome.
Systems Design – With the system requirements developed in the systems analysis phase, we begin to design the system by developing a logical and a physical system design. The logical system design document will list the systems functionality and the physical design system will list the components that will be used to achieve the required functionality.
Development – The goal of this phase is to determine if existing systems can be used to meet the system design and functionality. If those systems are not capable, then development of a new system will take place.
Testing – After the system has been either purchased or built, it must be tested to make sure it it has the functionality required and produces the required results. The system must be stub tested, unit tested and then the final systems test can performed, which consists of verification and validation.
Implementation – Once the system has been successfully tested it can be implemented into the working environment. The first step in the implementation phase is to get all the components of the system up and running, and transfer data from any old system(s) to the new system, or input data into the new system if there was no old system. Then the company must decide on a method...
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