GE OPTIMA MR360 Service Training page 179

This matrix is the basis for the logic of the ICW in Maintenance Mode. If you click [More] on
the pop-up from the previous slide, this is the matrix that you will see. It is good to become
familiar with how to read this matrix so that when you perform re-calibrations at sites you
will understand what it means.
Maintenance Mode Dependency Matrix:
How to read this matrix: The same tasks are listed vertically and horizontally. In the column
on the left find the calibration that you wish to run. To the right of that calibration name,
follow the line horizontally until you reach the yellow square. Any task vertically directly
above the yellow square is a pre-dependency, and any task vertically directly below the
yellow square is a post-dependency.
Post-dependencies are more important than pre-dependencies. For troubleshooting
purposes, if user is about to perform a certain calibration (or task), it would be beneficial to
see what pre-dependencies are related to that calibration and consider performing them. If
pre-dependencies are not run, the system will not be negatively affected. Post-
dependencies, however, are very important. For example, if Grafidy is run, LVShim, Gradcal,
EPT and Probe values may have changed. Each one of these calibrations should be run
after the completion of Grafidy because they are Post-Dependencies of that cal.
177