How to consider production capacity plan on sales order's delivery date.

Question

HI experts,
How to consider production capacity  on sales order's delivery date.
Say for example :
Production workcenter capacity to produce the XYZ material 10qty in a Day.
today i have created the sales order XYZ materail qty of 100. lead days has give based of MMR 21 days 17-07-2010( 3 sundays)
and in same day i have created other sales order XYZ material qty 5000 ,the lead days again it will came 17-07-2010.
Now my client requiremnt is when the schedule days is confirming in the sale order it sholud also consider the production capacity planning also
Even though my work centers are overloaded it is confirming the sales order on 17-07-2010 (based on leads days in MMR)
Thanks in Advance..
Sudha

Answer 1

Sudha,
Tell your client he needs to install SCM.  Here, you can use either CTP or MLATP to confirm orders based on production capacity.
There are a couple of standard workarounds available in R/3. 
One is to create a constrained forecast for planning materials, consistant with capacity, convert the forecast to PIRs, and then perform ATP against 'Planning' rather than against product, using MRP Strategy 63.
http://help.sap.com/saphelp_erp60_sp/helpdata/en/a2/4e799a927d11d1800f00c04fadcb73/frameset.htm
Another method is to leave the Sales orders unconfirmed at original order entry (eg, no lead time).  Run MRP, run capacity levelling, firm the levelled planned orders, and then run BOP (called 'rescheduling' in R/3) against the unconfirmed backlog, with an ATP that considers firmed planned orders as supply elements.  The sales orders will confirm against the planned orders, which are scheduled according to available capacity.
Either of these two methods will work, but the CTP SCM solution is by far the better answer.  Downside of SCM solution in general is the substantial implementation effort required.
Rgds,
DB49