(originally published on Nick's Book Blog)

Doing a little research and found an article that pointed these out:

• Sort: Eliminate what is not needed.
• Set in order. Organize what remains.
• Shine. Clean work area.
• Standardize. Schedule cleaning and maintenance.
• Sustain. Make lean thinking a way of life.

This is from the book Lean Thinking: Banish Waste and Create Wealth by Womack and Jones.