5 Why is a problem solving technique pioneered by Toyota Motor Corporation. The 5 Why concept is simple. If problem solvers ask the question “Why?” five times successively, the root cause will present itself by the 4th or 5th Why. Often, the 5th Why points directly at the management systems and practices allowing the problem to exist.
5 Why is not a deductive brainstorming technique. The 5 Why process for RCA (Root Cause Analysis) requires that each Why be supported by data or facts. The process is a team activity, requiring members to work at each level with discipline to obtain supporting data. The known or collected facts from each Why lead to the next Why as the process continues, concluding when the root cause is found. Quality-One has an extensive background in RCA using various techniques, including 5 Why. Our expertise in 8D (8 Disciplines of Problem Solving) and 5 Why, make Q-1 the best choice for your RCA Training and Facilitation.
What is the Three-Legged 5 Why?
The Three-legged 5 Why is a technique used to follow three related paths. The purpose of the Three-legged 5 Why is to arrive at the root cause level, where energy has been expended incorrectly resulting in a failure chain. The failure chain ends at the symptom or effect experienced by the customer. The Three-legged 5 Why begins with a problem symptom and ends with three separate conclusions for improvement.
The Three Legs are:
- Root Cause (Energy Misappropriation)
- Barrier or Control (Quality Control)
- Systemic Cause (Management)
Findings from each leg can crossover between paths. The development of subsequent legs result in a more detailed explanation of where, when and how the problem occurred. Prevention of future problems are addressed in all three legs, with the following:
- Avoidance of the specific root cause through SPC (Statistical Process Control and Process Capability) or Error / Mistake Proofing (Poka Yoke)
- Poka Yoke of the process responsible for the problem
- Establishment of Standard Work Practices to maintain consistency
How Can I Learn More About 5 Why?
The Q-1 approach to 5 Why and RCA is logical and effective. We transfer the knowledge and techniques necessary for effective RCA, permanent corrective action and prevention of recurrence. We customize the techniques and methods to fit your specific problem solving needs.
5 Why and Root Cause Analysis from Quality-One; Discover the Value!
