Juran Trilogy Diagram

Chronic and sporadic

When the process is done, we will find the show inability to produce 100 percent good product.Statistic shows there are more than 20 percent of the work must be attributed to the decrease chronic-quality issues.Waste becoming more common. Why do we find this waste happened?

Through conventional methods, production operations can not resolve chronic wasting planned in the production. What can be done just controlling thru quality control to ensure that its does not become worse.

Normally we see a sudden surge in sporodic that increase the level of more than 40 percent.This sporadic defect resulting from unplanned events such as failure of resources, problems in the processed or human error.

One of the quality control function is the production / operations will take corrective action to maintain the quality to the original level (status quo). This action is often called the "Corrective Action", "Troubleshooting", fire fighting and others. The final decision is to return the error level to the planned levels of 20 percent.

The result of chronic wasting improvement was taken to reduce the error to a much lower level. This decision or this target is achieved through a process of third-Juran Trilogy quality improvement.

Practically chronic waste are seen as opportunities for improvement and measures for improvement have been made.