> You seem to be playing a definition word game. [...] Obviously productivity does approximate business value in a very meaningful way when it is defined in terms of delivered business value.

Then the author responds

> Martin asserts "any true measure of software development productivity must be based on delivered business value". I agree, and I propose there is no such thing. We're better off dropping metaphors altogether and just talking about what programmers do: Solve problems.

So I guess the author wants to replace the term "software productivity" with something like "problem-solving productivity, measured in terms of business value"...? Kind of silly IMO, but to each his own.