This specifies the duration, in seconds, that a completed delay-measurement test iteration took to run to completion (0 to 65535), as explicitly stated in the description, a result figure rather than a configured setting. An admin uses this to sanity-check that a test iteration actually completed in the expected amount of time given its configured count and priority, and to help schedule how much total time a multi-iteration test campaign with a given repeat delay will actually take. For example, cienaCesCfmDelayMsgDuration reading far longer than expected for a given DMM count could indicate the far-end MEP is responding sluggishly rather than the test itself being misconfigured.