The Correlation Premise | #100

PawCast with GeePaw Hill

Today, let’s take on microtest TDD’s Correlation Premise: Internal software quality (ISQ) and productivity are directly correlated. They go up together, and they go down together. The correlation premise lies in direct opposition to the widespread but grossly over-simple analysis that suggests we can “go faster” by shorting the internal quality of our code. It says, on the contrary, the lower that internal quality, the lower our productivity. Start by noting that we’re talking about internal software quality (ISQ), not external software quality (ESQ). What’s the difference? ISQ is the attributes of the program that we can only see when we have the code in front of us. ESQ is those attributes a user of the program can see.

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