The
Shepherd: Lot History Analysis
The Shepherd next looks at the detailed operation
history of one of the inactive lots, as shown below. The
red indicates queue time, while the green indicates
process time. This lot spent over 40 hours in queue at
operation 2700, a Nitride Dehydrate operation.
Further analysis of Operation 2700 around the time
period of interest shows high, cyclic variability in both
WIP and inventory age at Operation 2700.
The Shepherd goes on to analyze the problem operation
in more detail. (Go to the next
page.)
|
