I'm having the same issue in Odoo 17. I try to follow the documentation when setting up the lead times on products or company wide and it is reversed. I can get it to work when I put negative numbers in but it seems the documentation and the function are not lining up. My guess is the math for the date is doing minus instead of addition.

i have the same issue with creating the manufacturing order from sales order the schedule date for the manufacturing came "Yesterday" the day before the order creating date in Odoo V14 , i changed the manufacturing lead time in the product screen to be 1 day then try but the manufacturing date came 2 day past then i change the  manufacturing lead time to be (-1) and it came correctly.

Does anyone have a solution for this yet? I'm having a lot of problems with the scheduling of work orders too mainly with them being scheduled for the exact same day and time even though the efficiency factor of the work centre has been set to 1?

any solution yet?

Is there a solution to this issue yet?

I'm using v8 with JIT

I have the same problem than you. In fact OpenERP uses production time and delivery time of product to schedule your purchase order in the past in order to have it ready for... today. This is really a pain because it does it even if you product need (sale in my case) is scheduled for 6 months later. I also tried to put some stock (10 in stock for a sale order of 11) . FYI I'm not using JIT module.

Well to summarize the MRP is not functionning for planning purchase according to your sale planning. A big miss actually.

The quotation order date is determined as follow :

Expected Date in the generated procurment order = Sale Order Date (on the SO) + Customer Lead Time (on the SO line, coming from the product) - Security Days (on the company).

Expected Date = Expected Date in the generated procurment order - Purchase lead time ( in your company definition ---> configuration tab ).

Quotation Order Date = Expected Date - Delivery lead time ( in your product definition ---> procurment  tab --> choose any supplier ).

Unfortunately I have not got a work around for it.

Hello,

This is still a real problem. With this way we end up with a wrong sequence of purchase order date vs purchase order number. We are testing a "quick-fix" for this: the purchase order date is the date it's issued. It can never be in the past but it can never be in the future, also. If we send the purchase order for supplier immediately it must have the right date.