OEE Report: KPI formulas and aggregation rules?

Question

Hello,
is there documentation about the formulas and aggregation rules used in the OEE Report? Customers will only trust the KPIs in this report if they can verify them.
Formulas & Aggregation
How are the KPIs calculated?
How are the KPIs aggregated, if a work center or resource type is selected instead of a single resource?
Data & Variables
Which data is used? Where do the variables used in the formulas come from? E.g. which tables and columns or which SQL SELECT statements are used?
There is just very little information about the OEE Report in the online help or in the "SAP ME for Discrete Industries" document. And the MII "OEE Report Action", where obviously all the magic happens, is a black box.
Best Regards,
Martin

Answer 1

Hi Daniele,
Is Saichand correct in assuming that you have SUM setup in the BMM layer? If so, follow Saichand's recommendation.
If you are specifying the aggregation in the Answer Request itself, then try this.
Let's say this is your situation:
SELECT DIMENSION, MEASURE_1
FROM CRITERIA1
UNION ALL
SELECT DIMENSION, MEASURE_2
FROM CRITERIA2
UNION ALL
SELECT DIMENSION, MEASURE_3
FROM CRITERIA3
UNION ALL
SELECT DIMENSION, MEASURE_4
FROM CRITERIA4
Change it to this:
SELECT 'CRITERIA1' CRITERIA, DIMENSION, MEASURE_1 MEASURE
FROM CRITERIA1
UNION ALL
SELECT 'CRITERIA2' CRITERIA, DIMENSION, MEASURE_2 MEASURE
FROM CRITERIA2
UNION ALL
SELECT 'CRITERIA3' CRITERIA, DIMENSION, MEASURE_3 MEASURE
FROM CRITERIA3
UNION ALL
SELECT 'CRITERIA4' CRITERIA, DIMENSION, MEASURE_4 MEASURE
FROM CRITERIA4
Then in the combined criteria, add two new measures:
new_measnure1 = SUM(CASE WHEN CRITERIA in ('CRITIERA1','CRITIERA1') then MEASURE END
new_measnure2 = AVG(CASE WHEN CRITERIA in ('CRITIERA3','CRITIERA4') then MEASURE END
NOTE: The syntax for the new_measure* may need to reference the saw naming convention, ie. saw0 = CRITIERIA, saw1 = DIMENSION, saw2 = MEASURE.
That should work out for you.
Good luck and let me know if this helps.
-Joe