Difference in scheduled ship date in SO and suggested due date in Supply plan

Summary

Difference in scheduled ship date in SO and suggested due date in Supply plan

Content

Hello,

 

We are running the unconstrained supply plan and noticed that in a few cases that the suggested due date on a SO in supply plan is off by a day when compared to the scheduled ship date on the SO in order management. Example if the SO has a scheduled ship date of 1/9/21 then supply plan shows a date of 8/31. What could be the reason for this difference? The difference is always by a day and not more.

Thanks

Rahul