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System Life Cycle

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System Life Cycle

System life cycle (SLC) is an organizational process of developing and maintaining systems. It helps in establishing a system project plan, because it gives overall list of processes and sub-processes required for developing a system.

System Development Life Cycle

System Development Life Cycle (SDLC) means combination of various activities for developing a system. In other words we can say that various activities put together to develop a system are referred to as system development life cycle. In the System Analysis and Design terminology, the system development life cycle means Software Development Life Cycle.

Following are the different phases of software development cycle:

  • Preliminary study
  • Feasibility study
  • Detailed system study
  • System analysis
  • System design
  • Coding
  • Testing
  • Implementation
  • Maintenance

Different phases of software development life cycle are shown in figure.

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Different Phases of Software Development Life Cycle

Software development Life Cycle is also called waterfall model. The waterfall model is a popular version of the systems development life cycle. It describes a development method that is sequential. Imagine a waterfall on the cliff of a steep mountain. Once the water has flowed over the edge of the cliff and has begun its journey down the side of the mountain, it cannot turn back. It is the same with waterfall development. Once a phase of development is completed, the development proceeds to the next phase and there is no turning back.

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