Which waste is described as the worst because it opens the door to other kinds of waste?

Which waste is described as the worst because it opens the door to other kinds of waste?

• A. Transport
• B. Overprocessing
• C. Overproduction
• D. Motion

Answer: (C)

Overproduction is the waste being tested. It’s viewed as the worst because making more than is needed or making it too early starts a chain reaction that feeds all the other wastes. When you produce extra stuff, it sits in inventory, tying up capital and space, which then leads to more handling, more movement of goods (transport and motion), longer lead times, potential obsolescence or deterioration, and increased waiting or inspection. A pull system or just-in-time approach aims to produce only what is required, when it’s required, which eliminates the excess and dramatically reduces these downstream wastes. So the reason this is the best answer is that overproduction creates the conditions that give rise to many other wastes, making it the root source of inefficiency.

Overproduction is the waste being tested. It’s viewed as the worst because making more than is needed or making it too early starts a chain reaction that feeds all the other wastes. When you produce extra stuff, it sits in inventory, tying up capital and space, which then leads to more handling, more movement of goods (transport and motion), longer lead times, potential obsolescence or deterioration, and increased waiting or inspection. A pull system or just-in-time approach aims to produce only what is required, when it’s required, which eliminates the excess and dramatically reduces these downstream wastes. So the reason this is the best answer is that overproduction creates the conditions that give rise to many other wastes, making it the root source of inefficiency.