5 Why

• Site conducted

  Select

• Conducted on

  Date

• Prepared by

• Location
  Address

• Explain the problem to be solved. State the problem in objective terms and do not include any assumed causes of or solutions to the problem.

• Good example: There is a pool of oil on the floor measuring 2 feet wide by 1/4 inch deep vWhy 3?
  

• Poor Example: The forklift leaked a lot of oil on the floor because of a clogged filter

• Problem:

Why 1?

• Document the immediate cause of the symptom observed and the type of waste, then create actions for the countermeasures necessary to eliminate the cause

• Example - Symptom 1: Why is the oil on the floor? Cause 1: it leaked from the forklift. Countermeasure 1: Clean up the oil

• What is the observed symptom of the problem?

• Type of Waste

  Select Defects Over Production Waiting Non-Utilized Employee Talent Transportation Inventory Motion Extra Processing

  • Defects
  • Over Production
  • Waiting
  • Non-Utilized Employee Talent
  • Transportation
  • Inventory
  • Motion
  • Extra Processing

• Countermeasures

Why 2?

• Document the immediate cause of symptom observed and the type of waste, then create actions for the countermeasures necessary to eliminate the cause

• Example - Symptom 2: Why did the oil leak from the forklift? Cause 2: A gasket dried out. Countermeasure 2: Replace the gasket

• What is the cause of the symptom?

• Type of Waste

  Select Defects Over Production Waiting Non-Utilized Employee Talent Transportation Inventory Motion Extra Processing

  • Defects
  • Over Production
  • Waiting
  • Non-Utilized Employee Talent
  • Transportation
  • Inventory
  • Motion
  • Extra Processing

• Countermeasures

Why 3?

• Document the immediate cause of the symptom observed and the type of waste, then create actions for the countermeasures necessary to eliminate the cause

• What is the cause of the symptom?

• Type of Waste

  Select Defects Over Production Waiting Non-Utilized Employee Talent Transportation Inventory Motion Extra Processing

  • Defects
  • Over Production
  • Waiting
  • Non-Utilized Employee Talent
  • Transportation
  • Inventory
  • Motion
  • Extra Processing

• Countermeasures

Why 4?

• Document the immediate cause of the symptom observed and the type of waste, then create actions for the countermeasures necessary to eliminate the cause

• What is the cause of the symptom?

• Type of Waste

  Select Defects Over Production Waiting Non-Utilized Employee Talent Transportation Inventory Motion Extra Processing

  • Defects
  • Over Production
  • Waiting
  • Non-Utilized Employee Talent
  • Transportation
  • Inventory
  • Motion
  • Extra Processing

• Countermeasures

Why 5?

• Document the immediate cause of the symptom observed and the type of waste, then create actions for the countermeasures necessary to eliminate the cause

• What is the cause of the symptom?

• Type of Waste

  Select Defects Over Production Waiting Non-Utilized Employee Talent Transportation Inventory Motion Extra Processing

  • Defects
  • Over Production
  • Waiting
  • Non-Utilized Employee Talent
  • Transportation
  • Inventory
  • Motion
  • Extra Processing

• Countermeasures

Additional "Why's?"

• Document the immediate cause of the symptom observed and the type of waste, then create actions for the countermeasures necessary to eliminate the cause

• What is the cause of the symptom?

• Type of Waste

  Select Defects Over Production Waiting Non-Utilized Employee Talent Transportation Inventory Motion Extra Processing

  • Defects
  • Over Production
  • Waiting
  • Non-Utilized Employee Talent
  • Transportation
  • Inventory
  • Motion
  • Extra Processing

• Countermeasures