assessing the overall criticality of a maintenance operation

Rule 1: a maintenance operation is considered "Not acceptable" if at least one of the three areas has a "Not acceptable" criticality.

Rule 2: a maintenance operation is "Not acceptable" if all three areas have a criticality of "Acceptable with recommendations".

Rule 3: a maintenance operation is "Acceptable with recommendations" if :

• two areas have an "Acceptable with recommendations" criticality and the 3rd area has an "Acceptable" criticality;

• two areas have an "Acceptable" criticality...