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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.
Given the importance of drug safety, it is not surprising that there are a number of additional testing processes for the assessment of drug safety and efficacy. Although these tests are not as publicised as clinical trials, they are still very important. Stability testing is one such example.