Optimization Implementation jobs can be setup to run on an automatic schedule (such as every Saturday at 3:00 am) or to run automatically. An implementation job will run automatically when both the dataset related to the scenario AND the scenario itself have changed since the last run of the implementation job.
To schedule an implementation job, first select the correct job from the list of all implementation jobs within Optimize, then click Run Job -> Schedule It from the Selected Job menu or from the right click menu.
This will open the Scheduling dialog. See the article https://support.lityxiq.com/882325-Using-the-Scheduling-Dialog for help using the Scheduling dialog.