To be useful, market segments must rate favourably on five key criteria. What are those criteria? Marketing To be useful, market segments must rate favourably on five key criteria. What are those criteria? Answer: To be useful, market segments must be: (1) measurable, (2) substantial, (3) accessible, (4) differentiable, and (5) actionable. Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+