[wayner]

Clear and unambiguous is the guidance I give my customers on creating agreements

Examples of not clear and concise:
-Adequate
-Best effort
-Conscientious

The customer may think that best effort tis that we know how important it is to you and we'll get right on it. They may think it means they are short on resources and you'll be lucky if they get to it in week.

I like the food description of adequate in Glen's post #4 above

I would take adequate to mean enough to prevent business impact, but that it just my expectation.