Custom task (uc_task_custom)? how is the best way to implement intention

Question

Hello all,
i would like to tell you our intention. We want to calculate Capital Charge.  Thius means we want to read a couple of records from transactional cube (differing e.g. on item) then do a calculation, then write it back as one record (new item) into the transactional cube. The Custom method is not enough to ful fill the requirements because it can be used just for status monitor updating. Does anyone have a suggestion how to implemet this. Thanks in advance,
Murat

Answer 1

I did not use any BPS or IP planning functions; that might be an approach, but I've never worked with either application.  The calculation, in my case, was done in ABAP.
I don't have access to a BCS system at the moment, but I believe there is documentation and an example of how to implment the UC_TASK_CUSTOM BAdI delivered with the system.  Check the BAdI in SE18 and see if there is an example class listed.  I seem to remember CL_IM_EX_UC_TASK_CUSTOM or something similar. 
There is also the documentation in the BAdI which explains exactly which importing/exporting parameters exist.  IT_SEL will include things like group currency, period, year, FYV, cons group, company, etc.  ET_MESSAGE will determine the cons monitor status when you are finished.  You can show additional results on the screen (like a regular BCS task would produce), but you need to write your own ALV.  I don't believe it is possible for this list to be available with the "last log" functionality though (I could never find a way, at least).
uc_task_custom method is only to change status monitor
I would disagree.  The exporting parameters, as mentioned above, determine the monitor status.  But it's also an entry point for you to develop whatever you need to meet your requirements.  Need to have a document approval process for manual documents?  You can write a custom task for that.  Need to post equity pickups back to the GL?  You could write a custom task to call an RFC or BAPI in ECC and do that.  Need to export results from from the BCS virtual cube to a flat file, basic cube, or an end user's PC?  I'd write a custom task.  Custom Document?  Custom Task.
The issue becomes that greater development effort is required to create a custom task, than to customize a reclassification or an open hub.  If the standard functionality does not meet your requirements though, you can either change the requirements or hire a developer to implement them.
- Chris