Personal Needs, Fatigue, and Unavoidable Delays

You can take personal needs, fatigue, and unavoidable delays (PFD) into account when calculating standard time. The system changes the adjusted planned duration (also known as the standard time) with the PFD calculation.

During the update of an executed workload, the system changes the adjusted planned duration in one or more of the following ways:

  • Applies the PFD factor to the adjusted planned duration to compensate for time lost due to PFD.

    The PFD factor is a number expressed as a percentage or decimal. The system multiplies the adjusted planned duration by the PFD factor.

  • Adds the PFD allowance to the adjusted planned duration.

    The PFD allowance is an amount of time.

    If you are working with both the PFD factor and the PFD allowance, the system adds the PFD allowance to the adjusted planned duration after it has been multiplied by the PFD factor.

These adjustments allow you to consider aspects that are known only at the time of workload execution, and not known when planning the workload. For example, the time of day when the task is carried out, or the processor who performs the work.

PFD determination is optional. If you do not have BRFplus content for PFD configured, the system sets the PFD factor to 1 and the PFD allowance time stays blank.

Example: PFD Factor

In your warehouse, you use the PFD factor to alter the adjusted planned duration of tasks based on the experience level of the processors completing the task.

Regular processors have a PFD factor of 1, indicating that the adjusted planned duration should not be altered further.

Inexperienced or temporary processors have a PFD factor of 2, which gives them double the time needed by a regular worker to finish a task. The adjusted planned duration for these workers is multiplied by 2.

The normal time of a task calculated from travel distance calculation and engineered labor standards is 3 minutes.

For regular processors with a PFD factor of 1, the adjusted planned duration stays at 3 minutes. (3 x 1 = 3.)

For inexperienced workers with a PFD factor of 2, the adjusted planned duration is 6 minutes. (3 x 2 = 6.)

Example: PFD Allowance

An unavoidable delay happens during the processing of a warehouse order, and the processor is not responsible for the delay. During execution, the processor enters an exception code which corresponds to a PFD allowance of 2 minutes. You add the PFD allowance to the adjusted planned duration of the task to allow for the longer time needed to complete the task.

The normal time calculated from travel distance calculation and engineered labor standards is 3 minutes. Adding the PFD allowance makes the adjusted planned duration 5 minutes. (3 + 2 = 5.)

You are also using the PFD factor in your warehouse, and the processor involved is an inexperienced worker with a PFD factor of 2. The system applies the PFD factor before adding the PFD allowance. The adjusted planned duration is now 8 minutes. (3 x 2 = 6, 6 + 2 = 8.)