Incremental delivery :
Incremental delivery Rather than deliver the system as a single delivery, the development and delivery is broken down into increments with each increment delivering part of the required functionality.
User requirements are prioritised and the highest priority requirements are included in early increments.
Once the development of an increment is started, the requirements are frozen though requirements for later increments can continue to evolve.
In between aproach between waterfall model and evolutionary development.[4] 2
Incremental Delivery :
Incremental Delivery 3
Incremental Delivery :
Incremental Delivery A model between waterfall and evolutionary 4
The incremental process :
The incremental process 5
Incremental Delivery :
Incremental Delivery Advantages:
Customer value can be delivered with each increment so system functionality is available earlier.
Early increments act as a prototype to help elicit requirements for later increments.
Lower risk of overall project failure.
The highest priority system services tend to receive the most testing. 6
Incremental Delivery :
Incremental Delivery Disadvantages:
Increments should be small (no more than 20,000 lines of code).
Each increment should deliver some functionality. (It may be hard to map requirements to increments).
A variant of the incremental approach “extereme programming” is based on development and delivery of very small increments of functionality. 7