How many are the things I can do without!

—Socrates, quoted by Diogenes Laertius

If you wish to make Pythocles rich, do not add to his store of money, but subtract from his desires.

—Epicurus, Fragment 28

The essence of Agile approaches is simply this: we should inspect and adapt frequently rather than slavishly following a plan. We can express this in terms of learning: rather than avoiding or punishing learning, we should learn constantly and incorporate what we learn into what we do—even if what we learn is not consistent with our original plan. This might sound obvious, and it is, but it is also fundamentally opposed to the way we have always managed IT system delivery.

My friends, this is all there is to Agile ...

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