Progress analysis scenario

Can some one help me with a sample scnario for Progress Analysis which can help in understanding what events will lead to Cost Variance or schedule Variance and will give me EAC, ETC etc.

I have all the settings done for progress analysis, but I am getting same values for BCWP & ACWP.

Also, how is Plan POC related to schedule/duration/period of the activity?

Regards,

VDS