Leveling resources on Task, Resource Dependent, and WBS summary activities

The following rules apply to leveling resources:

If you level a Task dependent activity with driving and nondriving resource assignments, P6 Professional requires that all resources be available in order to place the activity.
If you level a Resource dependent activity with driving and nondriving resource assignments, P6 Professional requires that all driving resources assigned to the activity be available in order to place the activity. All nondriving resources will be leveled on or after the activity dates, which are driven by the driving resources.
If you level a Resource Dependent type activity with nondriving resource assignments, P6 Professional will place the resources on or after the earliest possible start date of the activity. These resources can be placed any time in the future after this candidate date.
If you level a Resource Dependent type activity with a combination of driving and nondriving resources, and the driving resource succeeds in finding availability, while the nondriving resource fails, the nondriving assignment dates will be delayed based on where the driving resources are placed.
WBS Summary activities are ignored during the leveling process.

If any resource assignment fails leveling, it is noted in the leveling report, even in cases where the driving resources succeed.