Top-down or bottom-up?

Rick Jelliffe ricko at
Thu Jun 17 19:45:51 BST 1999

From: David Megginson <david at>

>As Paul Prescod has pointed out, however, in both cases the process is
>really iterative: in a bottom-up approach, it's often useful to stop
>and throw together a straw-man architecture to see if what we've done
>so far makes sense together; in a top-down approach, it's often useful
>to stop and throw together some proof-of-concept components, to see if
>there will be any obvious implementation problems

Good point. (In my book I point out that) Maler and el Anderloussi's
is top-down, then bottom up, with a little middle out. Theirs is the
well document formal methodology.

Rick Jelliffe

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