[drcube]

"That which is measured improves."

Be wary of measuring - and hence improving - the wrong thing.

Sometimes you optimize for the wrong metric. The classic example is measuring programmer output by lines of code. The are many more subtle ways this can manifest, though.

[noblethrasher]

We know that measuring programming output by lines of code is bad because we measured that measure.

So, measure everything, including your measures.

[stephengillie]

When you have a tape measure, everything is something which must be measured.