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44342Re: [XP] Re: cons of XP -- fixed bid contracts

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  • Jim Standley
    Mar 2, 2002
    • 0 Attachment
      Ooops, you sure did. I gotta read more slowly, and write more slowly yet.

      ----- Original Message -----
      From: "Peter Hansen" <peter@...>
      To: <extremeprogramming@yahoogroups.com>
      Sent: Friday, March 01, 2002 11:58 PM
      Subject: Re: [XP] Re: cons of XP -- fixed bid contracts


      > Jim Standley wrote:
      > >
      > > Peter Hansen wrote:
      > > > I also don't really agree that one can't reasonably accurately
      > > > label a project 90% complete at some point in time near the end,
      > > > if one is using XP. With other methods, the remaining 10% is the
      > > > 10% that takes another 90% of the time, while with XP delivering
      > > > business value in priority order, that 10% might realistically
      > > > represent 10% (or even less, or slightly more) of the remaining time.
      > > >
      > > Really? You have a list of stories with estimates. By the time you're
      > > nearly done you should be able to do very good estimates for the rest.
      When
      > > the estimate for the rest = 1/9 of what you've already done ...
      >
      > Uh, I really think we're saying exactly the same thing. The only
      > difference is I unwisely used a confusing double-negative in my first
      > sentence... Sorry about that! :)
      >
      > > This discussion misses that at 90% done XP should have demonstrated some
      > > other values:
      >
      > I hope we didn't miss these things at all. I thought we'd covered all
      > of them by this point.
      >
      > > * When you're 90% done, you have 90% of the stories 100% done, not 100%
      of
      > > them 90% done.
      > > * The customers have value for their money. If they stop the project,
      they
      > > get what they paid for.
      > > * The customers have a good sense of project velocity. They can decide
      with
      > > confidence whether or not to go over budget and keep going.
      > > * The developers have proven themselves over and over by delivering
      useful
      > > stuff. Or not.
      > > * BTW: Any project that is +- 10% is pretty darned close!
      >
      > Yup. Agrees with what I believe.
      >
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