The Seven Muda
In the context of Lean Management, attention is repeatedly drawn to waste, which is translated as "Muda" in Japanese. Waste itself is often the cause of losses that can occur throughout a company, but it also offers great potential for reduction.
The seven Muda are:
- Waste from overproduction: More is produced than necessary.
- Waste from waiting: an employee's idle hands, poor process pacing
- Waste from unnecessary transport: non value-adding movement of materials or products
- Waste from producing defective parts: They disrupt the production flow and require costly rework.
- Waste from excessive inventory: Stored stock does not add value and incurs storage and holding costs.
- Waste from unnecessary motion: consumes time, leads to fatigue and increases the risk of injury
- Waste from inappropriate product design or process: Products are equipped with features that the customer neither needs, wants nor pays for.
The use of the acronym TIMWOOD provides another way to identify types of waste.
T = avoid unnecessary Transport
I = avoid unnecessary Inventory
M = avoid unnecessary Motion
W = avoid unnecessary Waiting
O = avoid Over-Production
O = avoid Over-Engineering (unnecessary processes)
D = avoid Defects
By analyzing the causes of Muda and applying Lean Management methods, waste can be minimized, costs saved, and production processes optimized.
