Arbitrator: The shipping manager admits that he decided to close the old facility on October 14 and to schedule the new facility’s opening for October 17, the following Monday.
Conclusion (is to blame = opinion)
The shipping manager is also to blame for the lost business resulting from the facility's delayed opening.
Evidence
The shipping manager was aware of the contractor's typical delays and should have planned for this contingency.
Evaluate
If we want to articulate the classic "If premise, then conclusion" principle, then it would sound something like,
.
Goal
Let's look for a principle whose right side is helping us to support conclusion language like "you are also to blame".
The trigger just needs to be something that applies to this shipping manager (and should match up with and/or "should have planned for this contingency but didn't").