Commitment costs

Dear Gurus,

I have a scenario like this:

I have maintained project stock for my materials.

I have activated commitment management, and relevant settings of valuation class, cost element category etc.

Now I plan material using item cat. L and create Res + Purch. Req. I plan activities in my project in Tcode CJ20N & then I budget the project in CJ30.

When I see the report S-ALR-87013558 initially, when there are no confirmation and goods receipt/issue

Budget = 1000

Commitment = 300

RemOrder Plan = 700

Assigned = 1000

Available 700

In this case:

1.) When I try to make changes in work in my planned activities, system allows to increase the planned costs upto 1000 ( because my budget is 1000 but rem. order plan is 700, so system will alow upto 1000, but after that it gives error of budget exceeded).

Whereas reqmnt is: system shall not allow to increase the costs more than 700. and shud a;;ow only after budget supplement

2.) the moment I do GRN, the consumption account is hit, and actual costs are updated in the project.

Requirement is : The atual cost should get updated at the time of Goods Issue and not GRN

pls help.

Regards,

VDS