Every so often, one should tackle a Big Question.
While the first (2006) edition of my book featured an IT value chain, I realized that I needed to think more deeply about IT value in the second edition. One new set of influences was Lean thinking applied to IT management. I'd read The Goal, other Goldratt books, and much Lean material. In particular, I was thinking about the following classic passage from The Goal, in which the protagonist (Alex Rogo) is asked:
...tell me, what is the goal of your manufacturing organization?" he [Jonah] asks.
"The goal is to produce products as efficiently as we can," I tell him.
"Wrong," says Jonah. "That's not it. What is the real goal?"