In this work, Ergonomic Functional Requirements (EFR) represented as desirable ergonomic attributes of the
equipment, and the alternative’s ratings of each attribute are evaluated by each expert, also the importance of each
attribute is defined using the experts’ opinions. Axiomatic Design theory requires that Design Ranges, Appropriate
aggregation procedures for the importance or weight establishment and the determination of the System Design
Ranges which are given to each attribute. Equations for the Weighted Ergonomic Incompatibility Content and
Membership Functions are also needed.