How many wastes are in Lean?

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Lean methodology defines 8 forms of waste:

  1. Transportation
  2. Inventory
  3. Overprocessing
  4. Overproduction
  5. Waiting
  6. Motion
  7. Defects
  8. Under utilized skills

Transportation waste

Movement of material, paper etc. that adds unnecessary time to the flow, increasing risk of being lost, placed in wrong location during transportation.

Inventory waste

Packaging or finished goods inventory, requires extra storage space and handling, raw materials not being processed.

Overprocessing waste

Unnecessary steps in the process, increasing risk of delivering product to customer, could’ve been combined with other steps.

Overproduction waste

Finished goods are ready before customer needs them, occupying resources and considered one of the worst losses.

Waiting waste

Failures of upstream process, creating idle time in current step, causing issues with downstream process.

Motion waste

Excessive turning, lifting, walking – all unnecessary motions that increase process time.

Defects waste

Rework generated due to damaged packaging, bad date code or best before on finished goods, product that was put on hold due to quality issues, resulting in lost sales or hidden costs.

Under utilized skills waste

Shop floor talent that is not used properly, causing lower employee morale, drive and creativity.

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