How to avoid double-counting in Total field

Question

Hi Gurus,
I'm new to Essbase.
Here's a question I don't know how Essbase handle it, my source data stores at relational database, normally one row in the fact table associates with only one row in dimension table, but very common scenario like one fact row can associate with many rows in dimension table, to simplify we have 4 tables:
1. DimProduct(ProductID, ProductName). there's one row like 1, "Bike"
2. FactSales(ProductID, Quantity), there's one row like 1, 10
3. FactSalesReasons(ProductID,ReasonID), there're 2 rows like 1,1 and 1,2 , suppose there're 2 reasons associate with this product sale, that means 1-N relationship between fact and dimension.
4. DimReason(ReasonID,ReasonName), there're 2 rows like 1,"Quality" and 2, "Promotion"
I expect the report as follows:
ProductName ReasonName Quantity
Bike Quality 10
Promotion 10
Total 10
But while built cube, I got the value 20 of Total. I know Microsoft SSAS has a many-many dimension usage can avoid this double counting issue (no need to write extra calculation script), can Essbase do similar way?
Thanks!
Xiao

Answer 1

What I would recommend in this case would be in a calc script. I would guess that this dimension is sparse which usually has a low calculation priority (calcs first and may get overwritten). So, at least for a first pass at a calculation...
========
SET UPDATECALC OFF;
Calc All;
"Total Reason" = @AVG(SKIPNONE,@CHILDREN("Total Reason"));
========
SKIP options are "none", "missing", "zero" or "both".
This will calculate for all accounts.