Process Drift is a measure of deviation that determines whether the current behavior of a process varies from the normal or standard behavior over a fixed period of time. This measure has rather a negative impact on the process, yet it helps figure out process issues and forecast process performance.
There are three types of process drift, as follows:
- Cyclical drift (happens many times on a regular basis)
- Instant drift (happens one time unexpectedly)
- Irregular drift (happens many times irregularly)
Process drifts happen when there are unexpected changing conditions that have an observable impact on the process’s behavior. For instance, changes in equipment specifications and also new lot of raw materials cause an amount of deviation to the manufacturing process. This process’s duration, resources and activities require for re-estimation. Another example: just employed salespersons need to be trained before they can participate in the selling process; thus the process may be extended for the amount of time necessary for employee training.