About leveling o resources with P3

Resource leveling is needed both at earlier stage of planning and during progress updating.

it is needed when the schedule is resource driven rather than time driven.

when your resources are limited, levelling helps you to organize activities according to logic sequences and resources availablity or limits.

Thanks for your answer ... so you mean you only level the resources when the schedule is resource-driven??? are you sure?

Resource levelling also needed for time-driven schedules.
for example :

when you level a time driven schedule with limited resource, P3 will show areas where the resource needed, is over the maximum limit of what is available.

From there you decide to use more resource for that particular time or extend your duration for that activity or the whole project.