ECC plan output seems to be wrong

Question

I have following setup for one of the plan:
MDS
Item 1 day1 15
Item 1 day2 30
Item 1 day4 30
Item 1 day4 50
Item 1 day4 100
Supplier constraint for item1
day2 - day3 10 units
day4 - day6 1 unit
the plan is a ECC plan .Plan has given following out put :
demand supply
Item1 day1 15 pegged to 5 on day2 and
10 on day3
Item1 day2 30 pegged to 1 on day2 and
5 on day3 and
24 on day 7 (this is ok since some days are
holiday in between)
Item1 day3 180 pegged to 180 on day 7
question is as follows :
i) for the item1 demand on day1, why it has not pegged to supply of 10 on day2 and 5 in day3 supply ?? Why this is reverse case here ??
ii) For Item1 demand on day2 , why the extra supply capacity of supplier i.e 5 more units has been used and why the supply from day4 to day6 of quantity 1 unit/day has not been used ??

Answer 1

Abhishek,
Review your pegging controls in the plan option and related profiles. For a capacity constrained ASCP plan, you should be using priority based pegging. Adjust the supply and demand windows to the range of time that you want the system to sort and rank your supplies and demands. Also check your demand priority rule in the plan options. Assuming you are using date based priority for the demands, you will see these demands ranked accordingly. You can see the demand priority calculated by ASCP in each peg's 'properties'. The supplies within that window have an implicit ranking based on supply type (firm, then real supplies that are non-firm, then new planned orders).
For your supplier capacity question, check your profiles related to how supplier capacity is accumulated.
Regards,
Kevin