Template:Multiple systems with event codes rga

Multiple Systems with Event Codes
The Multiple Systems with Event Codes data type is used to analyze the failure data from a reliability growth test in which a number of systems are tested concurrently and the implemented fixes are tracked during the test phase. With this data type, all of the systems under test are assumed to have the same system hours at any given time. The Crow Extended model is used for this data type so all the underlying assumptions regarding the Crow Extended model apply. As such, this data type is only applicable to data within a single test phase. As previously presented, the failure mode classifications for the Crow Extended model are defined as follows:
 * •	A indicates that no corrective action was performed or will be performed (management chooses not to address for technical, financial or other reasons).
 * •	BC indicates that the corrective action was implemented during the test. The analysis assumes that the effect of the corrective action was experienced during the test (as with other test-fix-test reliability growth analyses).
 * •	BD indicates that the corrective action will be delayed until after the completion of the current test.

Therefore, implemented fixes can only be applied to BC modes since all BD modes are assumed to be delayed until the end of the test. For each BC mode, there must be a separate entry in the data set that records the time when the fix was implemented during the test.