RE: Re: Responsibility

So said  Charlie Poole  on  12/13/2002 --------------------

>Bill,
>
>> This implies, I think, an EVMS (Earned Value Management System) 
>> approach, or
>> something like it.  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?
>
>I'm stunned. XP doesn't estimate value? Since XP claims to deliver the
>highest value stories up front, I think you need to explain why you
>say that. Do you mean we don't use dollars? Or are you excluding
>the Customer role from "XP practitioners"?

I see it this way, Charlie: programmers in XP take the Customer's decision about what constitutes value as gospel. Programmers do not estimate value; they follow the Customer's lead on which stories generate more value. Programmers also, for the most part, don't worry about how the Customer decides what generates how much value, because "that's a business decision".

I think the way to decide what constitutes business value is orthogonal to XP. XP assumes that the Customer determines value "somehow".

Bill: in case you happen to consider this a deficiency of XP, remember what the "P" stands for.

J. B. Rainsberger,
President, Diaspar Software Services
Let's write software that people understand.
http://www.diasparsoftware.com/
telephone: +1 416 791-8603
All correspondence (c) 2002 Diaspar Software Services.
If you want to use it, just ask; don't steal.



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