Heijunka

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Heijunka ( 平 準 化 ) is a term from Japanese production concepts ( see Toyota Production System ).

Heijunka is about the extensive harmonization of the production flow through a quantitative compensation. It is a continuation of Heikinka , the leveled production , in which the already fixed production cycle is repeated more than once a day. A synchronous production system cannot be created without leveling .

The Heijunka table forms the basis of the process. It contains the Heijunka cards, which, similar to a Kanban card, contain all the information required to manufacture a piece or a certain batch size . For a leveled production, the cards are inserted in such a way that they generate an even production mix when processed chronologically. The Heijunka cards are taken one after the other by the production or logistics employee, who removes all the parts required for this order from the warehouse and makes them available for production.

Queues and thus idle and transport times are largely avoided. A flow production (continuous flow manufacturing) with short transport routes is a prerequisite for this. The concept is particularly important in view of complex, multi-stage production. The respective bottlenecks have a limiting effect on the entire system ( equalization law of planning ) and at the same time generate waste in all other parts (see also: Muda ).

Individual evidence

1. ↑ Heijunka Board - Applying the next level of Kanban Process . In: Lean Production . October 16, 2016 ( lean-production.org [accessed October 22, 2016]).