Archive process in EV 10

Hi

we have 6 Exchange servers (EX 2010) & 6 EV server in our environment. I see lot of provisioning task & EV policies created in our infra. Each Mailbox policy associated with multiple provisioning task.

I would like to know how exactely Archive process works during the schedules ? how the provisioning taks inter-related works together with archiving.?

Many Thanks

Chandra