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18 1 Troubleshooting Methodology
Figure 1.8 Example of a change log
1.4.8 Troubleshooting Methodology Summary
There are many useful tools that can be applied to troubleshooting. This chapter
detailed many of these tools but especially focused on the STOP methodology of
troubleshooting and the 4M method.
STOP troubleshooting focuses on:
Systematic
Think
Observe
Proceed
The 4M method is how all of the defects in this book are discussed. All defects are
considered based on:
Molding process
Mold
Machine
Material