Retrograde Time

Retrograde Time （後退時間）

The retrograde time is the elapsed time from the failure of an item until its receipt at the next higher echelon.

The retrograde time from a site to its support site should be added to the support site repair time to obtain the TEMPO input value for the support site repair cycle time. This is because the total time to repair an item includes the time to get it to the repair facility. Another way of looking at this is that a count of assets by location at a random point of time will typically find some in the retrograde pipelines, and these must be accounted for in spares planning.