In "Agile Software Development with Scrum", Ken Schwaber stated that:
"Scrum demands the liberal application of common sense".
I think this applies to any agile methodology: common sense is a driving force for any practice that relies on empirical management and self-organizing teams.
Now, I have just read "Unsystematic Engineering", an IEEE Spectrum article where Robert W. Lucky dares saying out loud what everybody knows:
"(...) systems engineering is often based on experience and common sense, and we know where common sense fits in the hierarchy of things that justify a high salary."
Okay, we all work for the beauty and love of our craftsmanship and not for the bottom line, but is not this pattern of under-valuing the qualities we have learnt to be the right ones, something that gets harder and harder to accept?
So, what should be the true price of common sense? Could not it be evaluated by measuring the cost of projects that failed because of a lack of it?