Comments on: Breaking the Fractal V Lifecycle? http://www.markstaples.com/2009/12/11/breaking-the-fractal-v-lifecycle/ Ruminations and observations about software, technology, and beer. Tue, 17 Aug 2010 08:34:13 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Mark http://www.markstaples.com/2009/12/11/breaking-the-fractal-v-lifecycle/comment-page-1/#comment-15389 Mark Sat, 12 Dec 2009 02:41:36 +0000 http://www.markstaples.com/?p=153#comment-15389 I don't think of Plan-Do-Check as a lifecycle - it abstracts over levels of design abstraction, which are usually explicit in a lifecycle model. But OK, I agree with your point - in the original V model, there's no explicit "Check Your Plan" activity, and if it's implicit, it's probably implicit within the "Plan" activity. Still, I think if you admit the Fractal extensions to the V model, you are then free to think of a "Check Your Plan" activity as being either in the "Plan" activity (X)OR the "Check" activity. I think the better choice is to regard the original V model "Plan" activities as really being little micro-V Plan/Do/Check(-Your-Plan) iterations with null "Do" steps. At this point I feel like I'm arguing about how many angels could fit on the head of a pin. Maybe that's a sign that I'm pushing this point of view a little too far! I don’t think of Plan-Do-Check as a lifecycle – it abstracts over levels of design abstraction, which are usually explicit in a lifecycle model. But OK, I agree with your point – in the original V model, there’s no explicit “Check Your Plan” activity, and if it’s implicit, it’s probably implicit within the “Plan” activity.

Still, I think if you admit the Fractal extensions to the V model, you are then free to think of a “Check Your Plan” activity as being either in the “Plan” activity (X)OR the “Check” activity. I think the better choice is to regard the original V model “Plan” activities as really being little micro-V Plan/Do/Check(-Your-Plan) iterations with null “Do” steps.

At this point I feel like I’m arguing about how many angels could fit on the head of a pin. Maybe that’s a sign that I’m pushing this point of view a little too far!

]]> By: liming http://www.markstaples.com/2009/12/11/breaking-the-fractal-v-lifecycle/comment-page-1/#comment-15388 liming Fri, 11 Dec 2009 08:39:39 +0000 http://www.markstaples.com/?p=153#comment-15388 agree with your points. :-) I think the difference comes from how much one can "re-interpret" the right side of the original V when making it into W or fractal V. The right side of the original V means testing and it also means "checking code against" early life cycle corresponding artifacts, NOT checking early life cycle artifacts themselves. One can certainly relax that into a general "check" of anything. :-) In that case, maybe the model should be called the fractal PDC (Plan-Do-Check). agree with your points. :-) I think the difference comes from how much one can “re-interpret” the right side of the original V when making it into W or fractal V. The right side of the original V means testing and it also means “checking code against” early life cycle corresponding artifacts, NOT checking early life cycle artifacts themselves.
One can certainly relax that into a general “check” of anything. :-) In that case, maybe the model should be called the fractal PDC (Plan-Do-Check).

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