Rob England aka theitskeptic vat op in een twitterfeed de essentie van Agile, Lean en DevOps treffend samen:

Just wrote this for a non-IT boss:

Agile is the approach of working with complex systems anywhere.

Lean is the approach of optimising the flow of work anywhere.

DevOps is the application of Agile and Lean to the acceleration of value work through IT.