Integration Test Techniques

Integration Testing is done when the different modules of the product have been integrated together.

It is an orderly process, which is carried out until all the modules have been integrated into the system.

Following are the most commonly used techniques:

1. Big-Bang Integration or Non-Incremental

2. Incremental Integration

There are two incremental appraoches as follows:

- Top-Down Integration

- Bottom-Up Integration

Top-Down Technique helps to trap key interface defects earlier but core functionality tested late in cycle. And opposite is true for Bottom-Up Testing.

Next is System Testing.