Mastercamguru there is much more behind this logic as I have been going threw training on this and were it started from.it is also used allot in Lean Manufaturing.

but the thought of keeping on hand is not part of Kaban. you only want to have what is ordered and need no more no less . you do not make or order more then askes for till the others are done and you have a new Kanban for more. then you order waht is needed no more and no less.