2 Economy
Specifying a high performance product is one thing. Paying for it is another. Be realistic. Can the performance you desire be realised at a reasonable cost? Companies do not want to make products customers cannot afford.
Also, beware of overspecifying. Whereas specialist items or one-offs are sometimes held up by belts as well as braces by over-cautious designers, mass-produced items are seldom overspecified. Companies cannot afford the unnecessary expense.