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1 As it not possible makes it software application is defect free but testing will be necessary. 2  Most important thing of testing is the development environment is different than the Testing environment and the testing done on testing environment is similar to the Production environment. Most important thing of testing is the development environment is different than the Testing environment and the testing done on testing environment is similar to the Production environment.
Pre-testing. 1  It is vitally important that you pre-test your survey before administering it to your research sample. Pre-testing is the opportunity to see what questions work well, what questions sound strange, what questions can be eliminated and what needs to be added.