Several years ago I worked for a Consulting firm that gave weekly classes
on job estimation. What you are calling the client factor, they called
the confidence factor. It is real and very useful.
And then, you have the client factor, as in
* Work out a rough estimate
*
And then, you have the client factor, as in
* Work out a rough estimate
* Double it
* And multiply this result by the client factor to give the actual
estimate
You know what I mean,
* If you ever find such a beast, a really good client that knows what
they want
