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Re: PM Confessional

by dHarry (Abbot)
on Jan 15, 2011 at 14:17 UTC ( #882455=note: print w/ replies, xml ) Need Help??

in reply to PM Confessional

Ah confession time...

I once had to port an environment from Unix AIX to a VAX OpenVMS machine. Belief it or not, it was about 15 years ago:) Creating databases, dumping and loading data, modifying scripts and compiling tons of SW. At the end of a long day it all worked. "Let's just clean up this temporary directory and go home, I told my mate." Oops! I know the feeling, "hmm this takes longer than it should..." Next day it took about two hours to do everything again... I did learn from it, as it never happened again (so far).

Later a senior engineer explained me about the 4-factor. When you do overtime and get tired, everything takes 2 times as long and you make 2 times more mistakes. 2*2=4. It sounds silly but the 4-factor is a useful concept to know. Especially if you're managing a project and ask the SW engineers to do overtime to meet some deadline.



Comment on Re: PM Confessional
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Re^2: PM Confessional
by Albannach (Prior) on Jan 15, 2011 at 16:27 UTC
    That reminds me of something a senior engineer told me about 20 years ago on the topic of estimating effort: double your first number and go the the next larger unit. So if your first reaction is 30 seconds, better say 60 minutes. Four hours is more likely to be 8 days, and so on. I'm still crap at estimating individual task effort, but I'm much better at total project cost at least.

    I'd like to be able to assign to an luser

      These sort of rules of thumb sound half-funny half-useful, until the day comes that you apply them and still wind up behind an 8-ball...

      Er, not that that's ever happened to me, three times in a row, or anything. No siree...

      Ours was multiply by two and add 40.


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