Abstract: A method of operating a test in a test environment comprises running the test, detecting the generation of events during the test and for each detected event, populating one or more result buckets according to one or more validation routines. Each validation routine defines a result to add to a result bucket according to a characteristic of the detected event. Once the test is completed, or during the running of the test, one or more test scenarios are run against the result buckets, with each test scenario returning an outcome according to one or more algorithms processing the results in the result buckets. In a preferred embodiment, the populating of the one or more result buckets is according to validation routines that populate a matrix of result buckets, each result bucket being populated during a specific time period.