R
rootcrazy
Are there any guildelines on when root cause analysis can be stopped...or is the answer never?
Say you have a product where you weren't doing complete testing. Because of this some small level of rejects reached the customer.
You now add a new test that prevents the rejects from reaching the customer. But, the 8D process requires that you find the root cause of that failure mode.
After going so far in root cause analysis, you find the problem is a random defect, and the defect level is in the low ppm range. But, you haven't been able to find the exact location of the defect or what process step is causing the defect. Knowing that the defect is random, it is in low ppm level, you have general programs to reduce defects, you can test out the defect, and that the defect doesn't come close to being your number one yield loss, can you close root cause analysis?
Are there any publications that provide guidelines on this?
Say you have a product where you weren't doing complete testing. Because of this some small level of rejects reached the customer.
You now add a new test that prevents the rejects from reaching the customer. But, the 8D process requires that you find the root cause of that failure mode.
After going so far in root cause analysis, you find the problem is a random defect, and the defect level is in the low ppm range. But, you haven't been able to find the exact location of the defect or what process step is causing the defect. Knowing that the defect is random, it is in low ppm level, you have general programs to reduce defects, you can test out the defect, and that the defect doesn't come close to being your number one yield loss, can you close root cause analysis?
Are there any publications that provide guidelines on this?