How to calculate %time after breach?

How to calculate %time after breach where:
X = SLA “Time to resolution”
Y = Real work time to resolution
Z = This is needed

Z = (Y - X)/Y)*100
This formula for average time after breaching in %.
Please help!


Each SLA imported has a standard measure Elapsed hours.

This conversation shows a solution on how to import the SLA goal time as a measure for each issue:

Your calculation can be implemented using the two measures mentioned above.

Janis, eazyBI support