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1. How should I size my components?
SLOC source lines of code
Total number of class, if we use object oriented language
Total number of methods
Total number of components
2. How detailed should I get?
Granularity decides Accuracy
Labor month vs. labor hour
Component vs. SLOC
3. How often should I measure?
Weekly report, monthly summarize, snapshot, even large project no less than 2 weeks