Upgrade to 2017 products

Seeking recommended general process for upgrading to 2017 Products. We are currently using: Solidworks mechanical, Solidworks Electrical, PDM Pro - All on 2016 SP4.

Can I upgrade just PDM server products along with the PDM client - and NOT upgrade Solidworks Mechanical or Electrical clients? Then later upgrade all clients to 2017 Mechanical or Electrical - along with the database. Is this a good or recommended process? Thank you.

SolidworksAdministration