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Hi Bill,
> > Later, we want payment to be tied to creation of value. Again, the
> > smallest, tighest package we can deliver is probably best.
>
> This implies, I think, an EVMS (Earned Value Management System)
> approach, or something like it.
I don't see the implication. The "earned value" in EVMS, oddly,
doesn't mean what we normally mean by "value." In EVMS, earned value
means "the value of completed work expressed in terms of the budget
assigned to that work" [draft ANSI standard for EVMS, dated June 16,
1997]. So "earned value" is, more or less, what we thought the task
would cost.
> I wonder if XP practitioners, who don't, as I understand it,
> currently estimate the value of a feature but only the work it will
> take to implement it, would be willing to endorse this modification
> to XP's practices. What do you think?
In my mind, the earned value in EVMS is more like story points than
like value. They both indicate expected cost.
Dale
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