Hi All
I am trying to setup ATP + issue margin and getting some strange results (I'm sure they're correct - I just don't understand how they are being worked out).
I have setup a simple stocked item that has no inventory.
I have pointed it to a coverage group that has an issue margin of 5 days. The coverage group is setup to use a standard calendar with working times Mon-Fri 9:00 to 17:00). The master planning parameters is set with 'Safety Margin In Day' to Working Days = ON
In my sales ledger parameters I have set the ATP time fence to 5.
I don't have any demand or due supply for the item.
I create a sales order (order date 6th Feb) and add the item line for my item and the requested ship date is changed to the 19th Feb - a lead time of 13 days. I'm a bit unsure how this is worked out but assume it is on the premise that 10 working days INCLUDING today (as I don't have a cutoff time) takes me to the 19th.

If I then change master planning parameters set 'Safety Margin In Days' = Working days = OFF I get the following...I can only assume that AX is counting forward 9 days from today's date and getting to the 15th - seeing that is a Saturday and therefore suggesting the 17th (the Monday) as the earliest?
Why is the lead time 11 days?
Note that working days still suggests it is set to YES even though it is not.

Thanks in advance for any help.