"The Hierarchy of Needs uses a heuristic scale; there is no way to quantify the level of any one need, nor is there a definable point at which a need has been satisfied. As a result, a person need not be 100% satisfied in one level to begin focusing on another. Maslow suggested that a person could have 85% of their physiological needs, 75% of their safety needs and 90% of their belonging needs, though he gave no method to calculate what 75% would represent."

http://www.investinginchildren.on.ca...es/maslow.html