Toyota's five "why"

As with some companies, Toyota has not followed suit by six sigma management methods, and has also achieved a high level of product quality. There are no complex tools and methods to explain the success of Toyota in product development. They do not use complex statistical analysis, but take painstaking and careful measures to solve the problem. Most companies do not do this in their daily operations. This is related to a company's discipline, attitude, and culture.

 

In the improvement process of Toyota, There is a famous" Five why analysis ". To solve a problem, you must find the root cause of the problem, rather than the problem itself. The root cause is hidden behind the problem. For example, you may find that the source of a problem is a supplier or a mechanical center, that is, where the problem occurs. But what is the root cause of the problem? The answer must be further explored to find out why the problem occurred. First, ask the first "why", get the answer, and then ask why, and so on, and ask the "why" five times ".

 

The following is a case:

 

Why do the company's office buildings require regular repairs on their external walls every year?

• walls need to be cleaned every day, damage to walls by Acid Etching-why?

• the building is stained with a large amount of birds and droppings every day-why?

• the building is surrounded by many swallows. Why?

• there are many swallows on the building. Why?

• There are spider-favorite insects on the wall-why?

• the dust here is the most suitable for the breeding of insects-why?

• the dust and the light from the window stimulate the breeding desire of the flying insects.

 

Solution: pull the curtain