Thursday, May 3, 2012
Questions from the Field: Wrench Time Studies
Answer: That is correct, planned jobs only.
The purpose of the wrench time study is to see how good the planning system is. If they are pulled off onto sponsored work, the wrench time will likely drop significantly because troubleshooting, looking for parts, looking for prints, and waiting on production are all part of unplanned work but not a part of wrench time.
Of course this is not to say that you cannot continue the study, but it will represent something very different than if they just stayed on planned work.
So it could be as simple as this:
If they stayed on planned work then the wrench time study is a measure of the quality of the planning process.
If they do not stay on planned work, then the wrench time study is a measure the re-activeness of the organization and how well the crafts are able to accomplish unplanned work.
Both of these are valuable, but they represent two totally different things.
Hope this helps.
Allied Reliability Group