Definition
REFA time type; describes the sum of all times for the execution of order-independent process sections containing the process types “supplementary activity” and “disturbance related activity interruption” that have arisen over the course of the determination of the allowed time during the recording-time.
Personal allowance time
Factual allowance time
- flows into the work order time as well as into the occupancy time and occasionally into the setup time (trv or trvB),
- is usually determined separately or specifically agreed upon, because its’ occurrence in the work process cannot be foreseen,
- comprises factually constant and factually variable portions and
- is non-value-adding