Definition Software Development Life Cycle
The Software Development Life Cycle (SDLC) describes the life cycle of a software product. It is a systematic process for the creation of software, which is intended to ensure the quality and correctness of the software. The goal is to create high-quality software that meets the customer’s requirements.
Because complex software applications have high demands on development and support, a division of labor is important. The creation of the software product therefore takes place in different stages.

Phases

  1. requirements analysis
  2. feasibility study
  3. design
  4. coding
  5. testing
  6. deployment
  7. production support
  1. requirements analysis
    In the first phase the requirements are analyzed by the leading team members. In addition, quality requirements and the associated risks are planned. This phase gives a good overview of the scope of the project and the problems and opportunities the project causes.
  2. feasibility study
    This phase serves to define and document the software requirements. This process is performed with the SRS document (Software Requirement Specification). This document contains everything that should be designed and developed.
  3. design
    In the third phase, the system and software design documents are created according to the requirements specification document. The focus is now on the determination and analysis of structured solution approaches in terms of a software design that meets the requirements.
  4. coding (one of the longest phases)
    This is where the developer starts to build the system by writing the code. The tasks are divided and assigned to the developers. The developer must also follow various guidelines here to generate and implement the code.
  5. testing
    When the software is ready, the test team starts testing the functionality. The aim is to find out whether everything meets the customer’s requirements. In this phase, errors can be found and corrected by the development team. This is repeated until the software is error-free.
  6. deployment
    When the software is error-free, the deployment process begins. Here the final version is released and checked.
  7. product support
    The last phase is about product care and an accompanying maintenance service. In this way, the requirements and wishes of the customer can be quickly met and software updates can be carried out.

The SDLC thus describes the entire life cycle of a software product.

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