how to use 'fields to be changed', 'fields for conditions'?

Hi all,

I have two questions regarding BPS. If you know, please share ur knowledge. Thank you.

1)<b> How to decide which CHARs or KFs should be 'fields to be changed', 'fields for conditions'? EX:</b> if you want to execute distribution to the product lines AD11 & AD12, according to keys for the fiscal years 2002-2006 and for all key figures.

2)<b>what is 'general entry-key figure name'</b>? When will u use it? please give a example.