Which is the correct set for TIMWOODS waste categories?

Which is the correct set for TIMWOODS waste categories?

• A. Transportation, Inventory, Motion, Waiting, Overproduction, Overprocessing, Defects, Skills
• B. Transportation, Inventory, Motion, Waiting, Overproduction, Underprocessing, Defects, Skills
• C. Transportation, Information, Motion, Waiting, Overproduction, Overprocessing, Defects, Skills
• D. Transportation, Inventory, Motion, Waiting, Overproduction, Overprocessing, Defects, Knowledge

Answer: (A)

TIMWOODS is a mnemonic for the eight types of waste in Lean thinking: Transportation, Inventory, Motion, Waiting, Overproduction, Overprocessing, Defects, and Skills (often described as underutilized talent). This set is standard because it captures the main non-value-added activities that hinder flow and efficiency. Each waste represents a different drain on resources: Transportation is unnecessary movement of materials, Inventory is excess raw or finished goods, Motion is wasted human movement, Waiting is idle time, Overproduction is making more than needed, Overprocessing is performing steps that don’t add value, Defects require rework or scrap, and Skills highlights not fully using people’s capabilities. The other options introduce terms that aren’t part of the common TIMWOODS framework—Information or Knowledge instead of Inventory or Skills, and Underprocessing instead of Overprocessing—so they don’t fit the established eight wastes.

TIMWOODS is a mnemonic for the eight types of waste in Lean thinking: Transportation, Inventory, Motion, Waiting, Overproduction, Overprocessing, Defects, and Skills (often described as underutilized talent). This set is standard because it captures the main non-value-added activities that hinder flow and efficiency. Each waste represents a different drain on resources: Transportation is unnecessary movement of materials, Inventory is excess raw or finished goods, Motion is wasted human movement, Waiting is idle time, Overproduction is making more than needed, Overprocessing is performing steps that don’t add value, Defects require rework or scrap, and Skills highlights not fully using people’s capabilities. The other options introduce terms that aren’t part of the common TIMWOODS framework—Information or Knowledge instead of Inventory or Skills, and Underprocessing instead of Overprocessing—so they don’t fit the established eight wastes.