what is a description of key performance indicators (kpi)?

an amount, benchmark, or degree set to define and measure progress toward a goal
a visual depiction of a group's framework showing levels of authority, roles and lines of communication
a system for ranking things in order, from the top down or the bottom up, by level of importance
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The correct answer is : an amount, benchmark, or degree set to define and measure progress toward a goal.

Explanation:

The concept of KPI consists of a metric for the quantification of the performance of certain objectives. That is, it is a business performance meter for the evaluation of their success.

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