Offset in planned order with weekly lot sizing.

Hi,

After i run MRP with a weekly lot sizing procedure, avaiability date = start of the period, the MRP groups all planned orders of the week at the first requirements date of that week.

But what i need is to put that group of the planned orders in the last working day of the week before.

For example:

Can you please help me how to solve this issue.

Thanks in advance.

Mike