Default time
Default time to REFA is a target time exclusively of workers and work equipment to execute workflows .
General
The term comes from working studies . Standard times belong to the production order . They include the task of completing the tasks described in the given time. In working studies, a distinction is made between times by and for workers, resources and work items; for example, planned times for the work item are not referred to as standard times.
content
Standard times do not usually relate to the processing of an individual item of an order, but to the time for processing the order in a work system , the execution time . This is a consequence of the widespread lot-wise bundling of units into one order. A set-up time is added to the respective sum of the times of a unit , the set-up times being structured in the same way as the actual processing times. The distinction between people and resources leads to the terms
- Order time for humans and
- Occupancy time for the resource.
For humans ( workers ), default times contain basic times , distribution times and recovery times . No recovery times are given for the equipment (see equipment time ) (although they can become effective through interaction with humans).
Standard times can be determined in different ways. On the one hand, they can be derived from actual times ( questionnaire , time study , self-recording ...) or they are set directly as target times using suitable methods (calculation, comparison and estimation , SVZ , planned times ...).
See also
Individual evidence
- ^ REFA (ed.): Lexicon of the company organization . Munich: Carl-Hanser-Verlag, 1993 ( ISBN 3-446-17523-7 ). P. 195
- ↑ See also its problematization in one-piece flow .
- ↑ Grap, Rolf: Production and Procurement: A Practice-Oriented Introduction. Munich: Vahlen, 1998 - ISBN 978-3800623211 . Pp. 163-165.