>>>Add two weeks to the schedule for expected unexpected delays. Add two more weeks for unexpected unexpected delays.
>>
>>Sounds like Murphy's Law of Estimating:
>>
>>Take your next highest unit and double it. So a 2 hour job takes 4 days, and a 4 day job takes 8 weeks!
>>
>>Sounds about right to me for actuality. < g >
>
>Once a not-so-old programmer told me that before giving any estimates you should multiply the time by three. A couple of years ago I found out that someone actually had a name and formal process for it when I saw it published in Software Development Magazine!

That programmer was wise beyond their years!

>It is called the "Linear Productivity Factor" with a value of 2.94 and is based on the estimated lines of code for a system / program. Well, OK it does not necessarily translate to the same thing but I thought it was amusing. :)
>
>http://www.sdmagazine.com/documents/s=739/sdm0010d/0010d.htm (requires registration)

I guess lines of code is as good as anything when your doing a SWAG. ;)