Why-Why Analysis

Question 1

Definition

Answer 1

A problem-solving technique used to identify the root cause of an issue by repeatedly asking “why” until the underlying cause is discovered.

Question 2

Process

Answer 2

1. Identify the Problem
2. Ask “Why?”
3. Repeat
4. Reach the Root Cause
5. Address the Root Cause

Question 3

Benefits

Answer 3

• Encourages deeper analysis beyond superficial symptoms.
  
  • Helps uncover underlying issues that may not be immediately apparent.
  • Facilitates the development of effective solutions that target the root cause.
  • Prevents recurrence of the same problem in the future.

Question 4

Tips

Answer 4

• Encourage open and honest communication to facilitate the process.
  
  • Avoid blame and focus on finding solutions.
  • Involve cross-functional teams to gain diverse perspectives.
  • Document the analysis and findings for future reference.

Question 5

Example

Answer 5

• Problem: Production line stops unexpectedly.
  
  • Why did the production line stop? (1st why)
    
    • Conveyor belt malfunctioned.
  • Why did the conveyor belt malfunction? (2nd why)
    
    • Lack of lubrication.
  • Why was there a lack of lubrication? (3rd why)
    
    • Maintenance schedule not followed.
  • Why was the maintenance schedule not followed? (4th why)
    
    • No reminders or checks in place.
  • Why were no reminders or checks in place? (5th why)
    
    • Lack of standardized procedures.

Question 6

Applications

Answer 6

• Manufacturing processes
  
  • Service industries
  • Healthcare
  • Supply chain management
  • Problem-solving in various domains