The environment in which testing is conducted should be determined based on the life cycle output of the risk assessment. The following general principles apply:<\/p>\n
In many circumstances it is undesirable to conduct all testing on the final production environment. Common examples include:<\/p>\n
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The progression of SW build from a development environment through production environment depends on the risk priority associated with the system being installed or the change being made, and on factors such as the ease of possible modification removal from the system.<\/p>\n
A change to a custom data processing module in a large business system may require progression from a development environment to a test environment, to a validation<\/a> environment, and then to the production environment. This may be required because the change is a high risk priority, and, even if the if the original module could be restored easily, the test data may remain in the production environment.<\/p>\n Some tests, e.g., Performance Qualification (PQ), or part of it, may need to be conducted in the production environment.<\/p>\n <\/p>\n <\/p>\n<\/h2>\n
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