
Taiichi Ohno identified seven types of waste in Toyota factories. Since the focus of a lean enterprise is waste elimination, lean managers spend a lot of time analyzing their work and categorizing their activities into these three types. Because they add no value and only add to your costs, they should be eliminated.Īll of your activities fit into one of these categories. These actions are often easiest to see (or smell, in the case of rotten food). But you yourself are not adding a bit of direct value to your product. Lean says strive to minimize or eliminate these actions.Įxamples of type 2 muda-pure waste-might be letting milk become contaminated, leaving crops in the field, or packaging more than necessary. When you grow a crop nobody wants, order too many seeds, or let cut hay mold in the field, you are adding waste to your farm.
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These direct actions on the end product make the product more desirable and more valuable.Įxamples of type 1 muda-the necessary actions that don’t add value- might be keeping meat frozen as it awaits paying customers or storing grains in bins or cultivating a bed of spinach. Whenever you set up irrigation, vent greenhouses, or move portable fences, you might be performing an import- ant-even necessary-task. You might be setting the stage for nature to perform its value-adding magic. In many ways, the function of farming is to set the stage for the sun and plants and animals to do the real creating of value. When plants turn sun into food, value is added. The farmer is not alone in creating value. Type 1 muda should be kept to an absolute minimum, and type 2 muda should be banished altogether as soon as possible.Įxamples of actions that add value might be potting out transplants or washing your food. Your goal is to move as many of your activities into the first category as possible and then to perform those activities as efficiently as possible. Actions that do not add value but are necessary (type 1 muda).In fact, according to lean thinking, only three types of activities can ever occur on your farm: It encompasses concepts like idleness, futility, and uselessness, in addition to physical waste. In lean, it means any activity that does not add value.

But in lean, waste involves more than that.
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When we think of waste, images of trash cans full of plastic or rotting vegetables come to mind. Get the Book of the Week email newsletter delivered directly to your in box! The following excerpt is from Ben Hartman’s book The Lean Farm Guide to Growing Vegetables: More In-Depth Lean Techniques for Efficient Organic Production (Chelsea Green Publishing 2017) and is reprinted with permission from the publisher. Welcome to Book of the Week – a weekly feature offering you a glimpse between the pages of an Acres U.S.A.
