The incremental delivery plan

 

The incremental delivery plan: The nature and order of each increment to be delivered to the user have to be planned at the outset. This process is similar to strategic planning but at a more detailed level attention is given to increments of a user application rather than whole applications. The elements of the incremental plan are the system objective, incremental plan and the open technology plan.

System objectives : Recall that earlier we suggested that project planners ideally want will defined objectives, but as much freedom as possible about how these are to be met. These overall objectives can be expanded into more specific functional goals and quality goals.

  • Objectives it is intended to achieve.
  • Jobs the system is to do.
  • Computer/non-computer functions to achieve them.

Open technology plan : If the system is to be able to cope with new components being continually added then it needs to be extendible, portable and maintainable.

As a minimum this will require the use of-

  • A standard high level language.
  • A standard operating system.
  • Small modules.
  • A standard database management system.
  • Variable parameters.

Incremental plan : Having defined the overall objectives and an open technology plan, the next stage is to plan the increments using the following guidelines-

  • Steps typically should consist of 1-5% of the total project.
  • Non-computer steps should be included.
  • An increment should, ideally, not exceed one month and should not, at worst, take more than three months.
  • Each increment should deliver some benefit to the user.
  • Some increments will be physically dependent on others.
  • In other cases value to cost ratios may be used to decide priorities.

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