All,

Is anyone of you able to explain the most efficient way of operating machineries, e.g. two pumps; one online one spare? Is there any standard or guideline? Should one machine be operated to bust and the other comes online until the other gets repaired? Or they should be swap over monthly?

Cheers

Welcome to the boards. Look for the thread titled "Best Strategy" under "Posts About Improving Reliability" and then return here if you have more questions.
http://maintenanceforums.com/eve/forums/a/tpc/f/209103451/m/3621013522

Check now the "Maintenance Strategy Questions" thread under "Posts About Improving Reliability" board.
http://maintenanceforums.com/eve/forums/a/tpc/f/209103451/m/8371020062