Re: MPS -- BPCS-L

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Lisa,

The reason that we consultants suggest that you change the planning start
date each week are as follows:

When MRP creates planned orders, they are created no earlier that the
planning start date plus the horizon days/periods. This prevents MRP/MPS
from creating planned orders that should have been completed before today.
In a true MPS environment, where your MPS is frozen, you would not want the
system to create orders within your master schedule (which would be your
horizon length). Then the master scheduler can decide what to do with them.

Secondly, the demand time fence is based on the planning start date. This
time fence determines when you switch from considering orders to forecast
based on your settings.

So if you are not concerned about these two things, there is no real need to
change the planning start date each week.

Myron Hamilton
New Century Technology