Key performance indicator or KPI is a measurable value that is applicable to evaluate the success of an individual businessman or a business organization.  It is also used to determine the success of a business project.  KPIs provide us with the required data that is quantifiable enough to track the progress of the growth of an individual or an organization. 

Decisions such as changes in business model and plan are carried out based on key performance indicator findings.  KPIs like 'boosting weekly sales by 10% in the next three months' really help organizations grow much to the satisfaction of the organization.