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Metric Guidelines

  • Dependent attributes
    (mass is metric; material isn't)
  • Practical
    (Can you measure it?)
  • Some not quantifiable
    ("Looks sleek" units = "subj")
  • Some criteria may be "list"
    (Screw head compatibility:
    straight / Phillips / hex head / Torx)
  • Include popular criteria
    (Consumer Reports?)