Recoveries with iSCSI, FC, and NFS storage
Number of virtual machines and protection groups associated with a recovery plan
Virtual machine to protection group relation
Recovery site performance in a cluster with DPM and DRS
Configuration of various recovery plan parameters
Priority assignment of virtual machines in the recovery plan
High latency network between protected and recovery sites
Furthermore, best practices are suggested in applicable areas so that you can optimize the recovery time using Site Recovery Manager.