In what way KPI's are supporting & achieving functional goals in organization ? How KPI's are deployed with bottom line of employees ?

KPI is such a supporting and goals achieving which will help to control the excess of any that are provided to any respective company and also help to find the staff cost and actual sales compare to budget and financial status. 

Hi.

The best practice is to implement KPIs across the whole organization, not only in parts of it. KPIs should make a top-bottom hierarchy when the KPIs of upper level personnel are supported by those ones from lower level. Bottom level personnel KPIs should not exceed 3-5 items.