Black Box - Comparison Testing

5) Comparison Testing Technique

There are situations where independent versions of software be developed for critical applications, even when only a single version will be used in the delivered computer based system. It is these independent versions which form the basis of a black box testing technique called Comparison testing or back-to-back testing.

- Black-box testing for safety critical systems in which independently developed implementations of redundant systems are tested for conformance to specifications
- Often equivalence class partitioning is used to develop a common set of test cases for each implementation