Elements are compared pair-wise and judgments on comparative attractiveness of elements are captured using a rating scale. Usually, an element receiving higher rating is viewed a superior compared to another one that receives a lower rating. If the property does not hold for all the entries, the level of inconsistency can be captured by a measure called Consistency Ratio [37]. A value of CR less than 0.1 is considered acceptable because human judgments need not be always consistent, and there may be inconsistencies introduced because of the nature of scale used. The ability to identify inconsistent judgments through the calculation of consistency ration is considered one of the strong points of AHP.