Talk:Kanban

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Kanban vs Two-Bin System

The history section contains the following paragraph:

The system originates from the simplest visual stock replenishment signaling system, an empty box. This was first developed in the UK factories producing Spitfires during the Second World War, and was known as the “two bin system.” In the late 1940s, Toyota started studying supermarkets with the idea of applying shelf-stocking techniques to the factory floor. In a supermarket, customers generally retrieve what they need at the required time—no more, no less. Furthermore, the supermarket stocks only what it expects to sell in a given time, and customers take only what they need, because future supply is assured. This observation led Toyota to view a process as being a customer of one or more preceding processes and to view the preceding processes as a kind of store.

Questions:

1. There are no sources for this information, in particular the two-bin system _feels_ like it is older than 20th century so I doubt this is the first use of it 2. Two-bin systems are specifically different from Kanban systems - in fact there's a weakness in it. With Kanban the card is sent to signal when the "bin" starts being used, whereas the two-bin signal occurs when the "bin" is empty. 3. If the Kanban concept was influenced by the two-bin system I feel it needs a citation — Preceding unsigned comment added by 82.9.192.154 (talk) 06:15, 20 April 2022 (UTC)