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August 18, 2004

Comments

Dave Simpson

Clarke,

450 should be "defects are easier and less expensive to fix when found early"

debhart

Hi Clarke - I've just come across this page and am both intrigued and mystified. Where do I start reading to find out what this picture is? Never seen anything about TOC before, particularly not pictures like this...
Thanks
deb

Kent S.

It seems to me that there may be more than one cloud here. In order for integration to proceed smoothly, the interfaces must be well defined (good design) and the components must be tested prior to integration. Premature integration forces you to solve a bigger problem.

UDE 21. Many quality problems are not revealed until the integration phase.

A. (goal) Integration proceeds smoothly

B1. (need) Components are tested prior to integration

D1. Find defects before integration

C1. (need) Components are integrated as soon as possible

D1'. Integrate before components are adequately tested

B2. (need) Interfaces are well defined

D2. Define the interface before coding

C2. (need) Interfaces change as problem is better understood.

D2'. Define the interface 'on the fly'

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