Stuff For Sale
2004 Summer Tour
In The Press
Veggie Van Gogh
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The Software Building Activity
This "waterfall" process has many problems, and "a more iterative approach is needed to reduce the risk
and gain the necessary speed." [Shultz 9406]
The end result: the waterfall process rarely works as intended, rather it
into exceptions and special cases by which requirements are changed,
design is re-visited,
and coding is discarded -- it becomes a spiral.
- Time between feedback points is too long for today's market
- "Defects," whether in concept, requirements, design, or
coding, are by definition
not caught until near the end of the process.
- Relatively few opportunities exist for improving the product in ways
that were not
initially identi ed in the requirements phase.
Let's "take it from the top," this time using a spiral (or
iterative, or incremental,
or Boehm*) process. It looks identical at the top; the activity is to use
and capital to solve a problem to spec by producing a software product,
within schedule and budget constraints.
* We don't take part in the "methodology wars," feeling it is
more important to do
things differently than to obsess over the nuances between different
since the whole thing must be customized to some extent anyway. Some don't
word "spiral" because it is associated with an uncontrolled
"death spiral," some argue the differences
between "iterative" and "incremental." [Cohen 93] We use the term
"spiral" to encompass the common traits of multiple feedback
short time before feedback, and continuous attention to things normally
to project phases, such as testing, documentation, and integration.
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