By definition this is the movement of materials that adds no value to the product. In most cases, transportation waste is thought of as normal in a manufacturing environment. However, it is also evident in an office environment. For example, walking around to get signatures on documents. The excessive filing also leads to the waste of transportation since those files need to be moved from time to time.
Over processing occurs anytime more resources are used than truly needed to satisfy customers. Unfortunately, over-processing is one of the most difficult wastes to accurately identify and assess, making it rampant in many organizations.
While inventory is often thought of as an asset, being one of the 7 wastes suggests that may be wrong-headed. In fact, as a waste, inventory can actually represent tremendous loss. Not only can inventory cost 40 percent or more of its direct cost to carry, it ties up precious cash that could better be used elsewhere in the business. A simple definition of the waste of inventory is any on-hand material other than what is needed right now to satisfy customer demand. Inventory can be categorized in various ways.
The fourth step in the lean 5S (6S) process is seiketsu, or standardized. Standardize is fundamentally about establishing clear, unambiguous norms for people to perform. Standards are a prerequisite for continuous improvement. As Taiichi Ohno, the father of the Toyota Production System (TPS) put it, “Where there is no standard, there can be no improvement.”
Seiso is the third step the lean 5S process. Seiso translates from Japanese as “sweep” or “shine”. However, this translation often contributes to the superficial interpretation that sweeping or shining only relates to making areas subjectively clean or hygienic.