The Project Job Scheduling example was terrible. We deleted it, and replaced it with the much cleaner Food Packaging quickstart.

Out of all our quickstarts, Project Job Scheduling is - by far - the one I am least proud of. It was overfitted for a particular problem and - in hindsight - it didn't align well to real-world variants of Job Shop Scheduling that many people face. But before Food Packaging, it was all we had.

Sorry for the pain. Thanks for sharing these insights.