The Kanban is the flagship tool of the just-in-time part of its simplicity and efficiency in improving performance.
The specific Kanban is probably the best known and most used. It is simple as well of operation as of understanding. However, there are many pitfalls.
The constant Work in process (CONWIP) method has emerged as an improvement of the Kanban and MRP, mixing the two.
The specific kanban and generic kanban have a similar operation: they transmit the downstream production information to the upstream.
The different Kanban (generic, specific, CONWIP) have the same characteristics but their values or their methods of calculation are quite different.