First, metric or indicator must measure. It should me math formula,
equation, function. It must look like X = F(A1, A2, … An). Where A1-n
is the number of indicators you must look at and the F is the function
which tells what to do with indicators. X is the performance value.

What is bad indicator? It is when you tell, let's measure customers'
satisfaction in bank loan niche. You don't tell about what are you
going to measure, how you are going to measure this, it's not a
metric, but it's a good mission statement that tells about nothing.

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