How to think about planned lead times
2021
A fundamental construct of most planning systems is the planned lead time. A planned lead time is a control parameter that refers to the planned amount of time for a production, transportation or replenishment activity. The intent of this note is to provide a brief, critical examination of planned lead times. We first discuss why planned lead times are used and why they are they important. We then discuss the trade-offs to be considered in setting the planned lead times. Finally we offer a simple model to provide some insight on how the planned lead time for an activity depends on the variability of the requirements on the activity, and on the flexibility and utilization of the resource associated with the activity.
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