Page 36 - Injection Molding Advanced Troubleshooting Guide

1.4 Troubleshooting Methodology 17

1.4.7.6„ Is/Is Not
Is/is not can be applied as a simple tool to help narrow the scope of a problem. The
way to conduct an is/is not evaluation is to make a chart with headings of “is” and
“is not”. The problem is then broken down into statements about what it is or is
not, as shown in Figure 1.7.

Figure 1.7 Is/Is Not example

1.4.7.7„ Change Log
A change log can be used to help keep troubleshooting systematic by providing a
way to track the changes made. A change log can be something such as Figure 1.8,
which provides a simple sheet to record any changes and the impact that they had
on the defect. This can be handy for communicating across shifts so everyone can
see what was adjusted and the impact the change had on the problem.