Hi all,
Is there any formula for calculate Planned Order date and delivery date in planned MRP purchase order?

Thank you for your assistance.

Don't know what you mean, but standard MRP does not work with formulars that I know of:
Based on BOMs and Routings a required date is calculated. This is also the calculated delivery date for a purchase advice. The order date is simply the delivery date -/- the lead time of the item (if relevant added with a safety time). Hope this answers your question.

Hi Hutje33,
Thank you for your answer. My question is: I have a planned MRP purchase order. The system calculate Planned Order Date = 04/26/2006, Planned Delivery Date = 06/21/2006. This item in the order set Lead Time = 40 days, Safety Time = 8 days. It seems planned Order date <> Planned delivery date - lead time - safety time.

Not a lot of time currently to calculate it for you, but be aware of the lead time: this is in working days (in your case perhaps 5 days/week) as wel as the safety time is.
Plse recalculate and check the results.

I use working days to calculate, but it seems not correct.:(