bb6f1227_apter_8___Developing_Your_Site__Success_criteria
[Milestone] Stress test complete [Action] Validate that the site performs at the specified level of performance when fully loaded (normal load expected), for an extended period of time (usually three to five days). [Timing] When system integration tests are successful. Sometimes stress testing is done in conjunction with integration testing, if necessary, to shorten time to market. [Success criteria] 
System runs at targeted stress level for entire period with no performance degradation or excessive system resource consumption.
Chapter 8 - Developing Your Site
Success criteria