My friends at GBMP sent me a great video yesterday. Bruce Hamilton (a.k.a. Mr. Toast) and the GBMP team sing a little jingle to Devo on WIP. Excess inventory, be it raw material, work-in-process (WIP) or finished goods just results in waste, stagnation, quality risks, excess lead-time, increased costs, etc. etc. In fact "excess inventory is the shadow of muda". Hope you enjoy this video as much as I did.