In big bang Integration testing, individual modules of the programs are not integrated until every thing is ready. This approach is seen mostly in inexperienced programmers who rely on 'Run it and see' approach. In this approach, the program is integrated without any formal integration testing, and then run to ensures that all the components are working properly. [More]

Top-down vs. Bottom-up testing is simply the way you look at things. Bottom-up testing is the testing of code that could almost be considered an extension of unit testing. [More]

At Microsoft, Integration Testing typically referred to the testing that occurs at the end of a milestone and that "stabilizes" a product. Features from the new milestone are integration-tested with features from previous milestones. [More]