[cs02rm0]

The single biggest mistake in the example is giving an estimate for the whole project without knowing team velocity.

I'm inclined to agree. Often though a client will want an estimate (to a ridiculous accuracy) before agreeing to the work. Unless you churn out web page templates or something equally repetitive it's hard to have that relevant velocity.

I still come up against client managers that don't "believe" in Agile approaches too.

[reticulated]

Oh we still get regular "lively discussions" about exactly what features are going to be in a product with a release date 6 months away. I can completely understand though; it's very difficult to leave a conversation being told "we don't know yet, it's likely to be X & Y (but we're not 100% sure) and possibly Z too".