Communication - User initiates the request for a desired software product - Process Modelling and SDLC

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• Nirja Shah   -Posted on 06 Oct 15
  Communication
  - This is the first step where the user initiates the request for a desired software product.
  - He contacts the service provider and tries to negotiate the terms.
  - He submits his request to the service providing organization in writing.
  
  Requirement Gathering
  - This step onwards the software development team works to carry on the project.
  - The team holds discussions with various stakeholders from problem domain and tries to bring out as much information as possible on their requirements.
  - The requirements are contemplated and segregated into user requirements, system requirements and functional requirements.
  - The requirements are collected using a number of practices as given -
  
  1. studying the existing or obsolete system and software,
  2. conducting interviews of users and developers,
  3. referring to the database or
  4. collecting answers from the questionnaires.
  
  Implementation
  - It means installing the software on user machines.
  - At times, the software may need post-installation configurations at user end.
  - Software is tested for portability and adaptability and integration related issues are solved during implementation.
  
  Disposition
  - As time elapses, the software may decline on the performance front.
  - It may go completely obsolete or may need an intense upgrade.
  - Hence a pressing need to eliminate a major portion of the system arises.
  - This phase includes archiving data and required software components, closing down the system, planning disposition activity and terminating system at appropriate end-of-system time.

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