Runs have multiple steps. Each step is going to be unique and will have their own lead time and schedule. In the summary view for a run (Runs -> Click on a run), you can schedule each step's start and end schedule, along with a lead time.
From the main Runs view, click on the Gantt view button on the top. Here, you can see all of the runs scheduled in your factory in a Gantt. Below the chart, you can see unscheduled runs. Clicking on one of these will take you to the summary view for that run, where you can schedule each step.