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Agile and Other Processes

SDLC

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posted 19 years ago

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Here's a neat idea from Laurent Bossavit. Go to Google, select images, and search on "SDLC". There are some very scary pictures out there!

A good question is never answered. It is not a bolt to be tightened into place but a seed to be planted and to bear more seed toward the hope of greening the landscape of the idea. John Ciardi

Ilja Preuss

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posted 19 years ago

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Interesting. The wikipedia image looks a lot like the v-model...

The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus

Stan James

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posted 19 years ago

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I spotted several variations on the V model in the search, one of them was exactly the image on Wikipedia. I didn't think the left always matched the right very well ... requirements -> operational test? The V model seems to defer some important testing until very late, which sounds painfully familiar.
[ August 14, 2005: Message edited by: Stan James ]

A good question is never answered. It is not a bolt to be tightened into place but a seed to be planted and to bear more seed toward the hope of greening the landscape of the idea. John Ciardi

Francis Siu

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posted 19 years ago

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It seems that V model is the modern one, I have seen all SDLC pictures are cycle and chain. Does the concept remain the same for V model comparing with the traditional one such as cycle?

Francis Siu
SCJP, MCDBA

Lasse Koskela

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posted 19 years ago

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If I've understood the V model correctly, the original idea was not that the "V" would map directly to a timeline. In practice, of course, people have thought "analyse-design-code-test" and claimed they're following the V model.

Can anyone confirm/correct me on that?

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Scott Ambler

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posted 19 years ago

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The V model has been around for a long time, and frankly it's just another way to depict a serial, waterfall approach.

The W model extends the V model to basically indicate that you can organize a project into a series of (potentially overlapping) small waterfalls which develop the system incrementally.

The V/W models, not to be mistaken with Volkswagons

, seem to be fairly popular within the US DoD community. Those folks have a fairly horrendous track record when it comes to software development, so does it really make sense that we follow their advice?

In the end, you need to find a process that works well for your situation. The only way that you can do that is by understanding a range of them. You might find Choose the Right Software Method for the Job to be interesting.

- Scott

<a href="http://www-306.ibm.com/software/rational/bios/ambler.html" target="_blank" rel="nofollow">Scott W. Ambler</a><br />Practice Leader Agile Development, IBM Rational<br /> <br />Now available: <a href="http://www.ambysoft.com/books/refactoringDatabases.html" target="_blank" rel="nofollow">Refactoring Databases: Evolutionary Database Design</a>

Ilja Preuss

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posted 19 years ago

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Originally posted by Scott Ambler:

The V/W models, not to be mistaken with Volkswagons , seem to be fairly popular within the US DoD community. Those folks have a fairly horrendous track record when it comes to software development, so does it really make sense that we follow their advice?

The v-model is the official model of the german government. They even invested some million euros to modernize it - it's now called v-model XT (extreme tailoring :rolleyes

.

The track record of german government projects isn't very good either, of course...