©Net Objectives, 2002
NetObjectives
14
Accuracy vs Precision
nDefinitions
nAccuracy: Correct, doing what is required
nPrecision: Detailed, getting closer to development
npi = 4.345687987989… is precise, but inaccurate…
npi is “about” 3 is accurate, but imprecise…
nWhat we want to do is
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nWe Define Five Levels of Precision
nWhat’s the Scope?
nWho Wants What?
nHow Do They Get It?
nWhat Else Could Happen?
nHow Do We Deal With That?
Document
Validate
Increase
Precision