Triangulate research methods

There's great danger in just paying attention to one metric or getting too used to just one research method. See Campbell's law

• All research methods are limited in some way
• The best way to deal with this is combining multiple methods, so each one compensates for the risks in the others.
• Think of it as "looking at the same question from multiple angles".
• Having researchers of different backgrounds and skillsets on your team is a great way to ease triangulation.
• The real question should not be "how much are we willing to spend on research" but "how much risk of problems or failure are we willing to accept"?