What are the general operating rules for a single-card kanban system?
What will be an ideal response?
The operating rules for the single-card system are simple and are designed to facilitate the flow of materials while maintaining control of inventory levels.
1. Each container must have a card.
2. The assembly line always withdraws materials from the fabrication cell. The fabrication cell never pushes parts to the assembly line because, sooner or later, parts will be supplied that are not yet needed for production.
3. Containers of parts must never be removed from a storage area without a kanban first being posted on the receiving post.
4. The containers should always contain the same number of good parts. The use of nonstandard containers or irregularly filled containers disrupts the production flow of the assembly line.
5. Only nondefective parts should be passed along to the assembly line to make the best use of materials and worker's time. This rule reinforces the notion of building quality at the source, which is an important characteristic of lean systems.
6. Total production should not exceed the total amount authorized on the kanbans in the system.
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