Components on the same and different layers

Components on the same layer on the schedule cannot overlap, whereas components on different layers can overlap.

Example: Components on the same layer cannot overlap

A time-off event is associated with the activity, Sick. That component is on layer 5. You cannot schedule another time-off event associated with the activity, Vacation, during the same time frame as Sick.

Example: Components on different layers can overlap

From 8:00 AM - 5:00 PM, schedule a shift assignment called Full-time, 8 hrs. This component exists on layer 1.
From 9:00 - 11:00 AM, schedule a calendar event associated with the activity, Meeting, which exists on layer 4.
From 10:15 - 10:30 AM, schedule a non-working shift event associated with the activity, Break, which exists on layer 3.
From 1:00 - 2:00 PM, schedule a working shift event associated with the activity, Research, which exists on layer 2.
An employee calls in sick that day. You schedule the time-off event, Sick, which exists on layer 5. This event takes precedence over the other events, as the employee is not available to work.