Incremental

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Incremental

  1. 1. Basic idea of incremental modelDEVELOPING A SOFTWARE SYSTEMINCREMENTALLY FOR TAKING ADVANTAGE OFWHAT WAS BEING LEARNED DURING THEDEVELOPMENT OF EARLIER, INCREMENTAL,DELIVERABLE VERSIONS OF THE SYSTEM BY DIVIDINGPROJECT TO ITERATIONS OR INCREMENTS
  2. 2. ITERATIVE AND INCREMENTALDEVELOPMENT is a cyclic software development model developed in response to the weaknesses of the water fall model. approach attempts to combine the waterfall sequence with some of the advantages of prototyping. This approach favored by object oriented practitioners.
  3. 3. INCREMENTAL MODEL LIFE CYCLE
  4. 4. THE INCREMENTAL MODEL  increment #nSoftware functionality and features communications planning Modeling analysis design Construction Deployment code test delivery feedback  Increment #2 Delivery of nth increment communications planning Modeling analysis design Construction  Increment#1 code test Deployment delivery feedback Delivery of 2nd increment communication planning Modeling analysis Construction design Deployment code test delivery feedback Delivery of 1 st increment Project calendar time
  5. 5. INCREMENTAL MODEL LIFE CYCLE It basically: divides the overall project into a number of increments. Then it applies the waterfall model to each increment. The system is put into production when the first increment is delivered. As time passes additional increments are completed and added to the working system Notes: Phases on each increment are sequential.
  6. 6. CONT………… key process are to start with a simple implementation of a subset of the software requirements and iteratively enhance the evolving sequence of versions until the full system is implemented. At each iteration, design modifications are made and new functional capabilities are added.
  7. 7. ADVANTAGE & DISADVANTAGES Generates working software quickly and early during the software life cycle. More flexible - less costly to change scope and requirements. Easier to test and debug during a smaller iteration. Easier to manage risk because risky pieces are identified and handled during its iteration.Disadvantages: Each phase of an iteration is rigid and do not overlap each other. Problems may arise pertaining to system architecture because not all requirements are gathered up front for the entire software life cycle.
  8. 8. FINALLY……… success or failure of the software projects greatly depends on right chosen of software development lifecycle model.Always choose the one that achieve your goals , vary models and put your touch on your choice to make creative system .

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