Explain about Metrics and types of metrics like schedule variance , effort variance?

Before Going to the concepts, please know what are these and
from where it will come and who will measure

All these are called as Some Metric Measurement,
All these will be calculated by Project QA and Manager,
All these are coming from Project Plan

Effort Variance--Number of Man Months Working for Particular
Module and Difference between Actual and Planned Resources

Ex: For a particular Module 6 resource need to be work but
only 5 are working ,so there will be a lag of resource,then
effort variance will occur

Schedule Variance--Number of Man Months Working for
Particular Module for Number of Days

here both effort variance and Schedule Variance are directly
propositional

---------------------------------------------------------------------------------------------------------------------------
Note: 

Planned Effort is the actual estimate you received from the Client. If you do your own estimate based on the planned effort you get from the client then that will be a different scenario.

Effort Variance should be (Actual Effort - planned Effort)/ Planned Effort.

EV should calculate w.r.t Person Days.

Schedule variance should be (Actual End Date - Planned End Date)/Planned End Date.

SV should calculate w.r.t Person Hours.

-------------------------------------------------------------------