Our Organization Goal is set for Effort Variance and Schedule Variance as -10% to +10%, -10% to +10% respectively

If the acutals are met around -11% or +12%,what is the analysis that can be done and how are the Enterprise Quality Goals set for the next quarter?

Can anyone explain in detail and provide me an URL,which explains more about analysis of metrics

Kindly send me ur valuable inputs.

Thanks in Advance,