Examples of the 5 whys in different sectors

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The 5 Whys technique is a simple and powerful tool that can be applied to a variety of industries. It has proven effective in identifying root causes and implementing lasting solutions.

Let's look at real-life examples of how different sectors are leveraging the 5 Whys technique.

Lean manufacturing
Problem Statement: An automobile manufacturer is seeing an increase in defective vehicles.

1. Why are so many vehicles involved in traffic accidents this winter?

The number of brakes that do not work has increased.

2. Why are the brakes failing to function this winter?

because the viscosity of the brake fluid is too high when it is cold, which causes a communication directors email lists slower response when braking

3. Why is the viscosity too high this winter?

Because this year we changed brake fuel suppliers, and the brake fluid we receive now tends to thicken in the cold.

4. Why did we change brake fuel suppliers?

because the supplier offered brake fluid at a lower price

5. Why was the brake fluid from this supplier cheaper?

because it was intended for warmer countries and lacked anticoagulant

Root Cause: Decision to cut costs by changing suppliers without thoroughly examining the suitability of the new product for all operating conditions.

Solution: (a) Return to the previous brake fluid supplier, (b) recheck the technical specifications of the new suppliers, and (c) ensure that the production manager is consulted before changing material suppliers.