Origin of estimation accuracy graph?

[Ram Srinivasan]

I have seen a graph like this more than a couple of times

[image: accuracy-vs-effort]

Does anyone know the original source of this graph?

Thanks,
Ram

[Laurent Bossavit]

Post by Ram Srinivasan
Does anyone know the original source of this graph?

Mike Cohn's "Agile Estimating and Planning".

"The curve in this graph is placed according to my experience, corroborated in discussions with others. It is not based on empirical measurement."

Cheers,
Laurent

[Ram Srinivasan]

Thanks everyone !!!

--
sent from a mobile device, please excuse auto-corrections, typos and
grammar

Post by Laurent Bossavit

Post by Ram Srinivasan
Does anyone know the original source of this graph?

Mike Cohn's "Agile Estimating and Planning".
"The curve in this graph is placed according to my experience,
corroborated in discussions with others. It is not based on empirical
measurement."
Cheers,
Laurent

[David Grant]

This is figure 6.1 from Agile Estimating and Planning.

Post by Ram Srinivasan
I have seen a graph like this more than a couple of times
[image: accuracy-vs-effort]
Does anyone know the original source of this graph?
Thanks,
Ram