Query Designer: Ideas how to calculate remainng weeks?

Question

Hello!
I'm fairly new to BI, so bear with me...
I'm creating a query and I need to have a column that calculates a correction value for a weekly target value.
The general idea is a very simple logic. Based on previous year's net sales a 10 % increase is the target level for the current year. But if current sales are lower than the set target, I would need to create a logic that raises the target for the remaining weeks of the current year.
In other words, if  01.2006 the sales were 10, then the target for 01.2007 is 11. If sales in 01.2007 are only 9, the sales target has to be higher for the remaining weeks to reach 10 % yearly growth in sales.  So the weekly addition to the target values for weeks 02.2007 - 52.2007 would be 11+(11-9/remaining weeks).
Any ideas on how to solve this in query designer? BI version is 7.0.
Points rewarded naturally!
Thanks in advance,
Antti

Answer 1

Hello Antti,
You have essentially done the hard part which is define what you actully need in your query.
My advice to you (and there would be many ways to do what you require) would be to create a "Calculated Key Figure"
So using your example your calculated key figure should be,
TARGET + (TARGET - ACTUAL / "REMAINING WEEKS")
REMAINING WEEKS I would create a variable, without going into too much detail here are two sites which I have found useful in the past.
http://help.sap.com/saphelp_nw04/helpdata/en/61/579b3c494d8e15e10000000a114084/content.htm
and
http://help.sap.com/saphelp_bw33/helpdata/en/f1/0a56a7e09411d2acb90000e829fbfe/frameset.htm
Hope this helps Antti
Regards
Ben