It is reported that in 2011, Tim Cook, Apple’s CEO, called inventory “fundamentally evil”. Over the years I’ve heard many accountants, Controllers and VP’s of Finance say essentially the same thing – inventory is a bad thing. But how can that be? If it wasn’t for raw materials or purchased components (two types of inventory) we wouldn’t be able to make the products we sell. Why, in many organizations, is there so much focus on inventory and why is it “fundamentally evil”? Let me offer a provocative statement . . . inventory is not evil when it is having value added to it and is consequently progressing closer to the customer. I think that ultimately, inventory is not evil; not converting it to cash . . . is evil.
OK, if that is a true statement then why is inventory one of the 7 Wastes? The reason is that by looking for inventory, and finding it, tells us something about the processes inability to convert it to cash. Inventory is not a cause, but an effect. When we have inventory lying around, it is a symptom of some other problem. And so, inventory is a powerful story teller, and we must be prepared to listen to the message it is sending.
Inventory as a waste is defined as raw material, work in process, components or finished goods not currently having value added to them. In the office world it is redundant data sources. In conjunction with the 6ixSigma.org ‘7 Wastes Evaluation.xls’, assess the level of inventory waste in your organization by ranking the following statements using a 1 (never), 3, 5, 7, 9 (always). High scores indicate high inventory waste and candidates for waste reduction:
For Manufacturing:
1. Setup or Changeover times are more than 1 minute.
2. If a defect is found it usually affects multiple parts.
3. Upstream processes are unreliable.
4. Suppliers are unreliable.
5. More than the minimum number of parts are kept in the area.
For Office Applications:
1. Multiple instances of a single data element exist.
2. If a defect is found in one instance, it must be corrected in multiple instances.
3. The process specifically requires multiple instances of data.
4. There are no processes in place to remove data from a powered container.
5. More than the minimum number of instances exists.
Fortunately, raw material, work in progress, components and finished goods inventory are easy to see. Walk through any factory and assess the effectiveness of the process by observing the amount of inventory waiting to have value added.
In the office, inventory is harder to see. Anecdotally, large organizations store a single fact of data 10 times. That is, 10 times, when 1 time is sufficient. Imagine the time, effort, system requirements, management processes, etc. it takes to maintain this. What customer would be willing to pay an organization to manage 1 fact of data in 10 locations?
As I’ve said before, Waste is a thief – and if it is not eradicated, it will rob you until you are out of business.
Michael
6ixSigma.org online 7 Wastes training is located here.