“…The values of 1, 3, 5, 7, and 9, in), represent equal importance, weak importance, essential importance, demonstrated importance, and extreme importance, respectively; while the values 2, 4, 6, and 8 are used to compromise between the above values. (4) To calculate the importance degree, the normalisation of the geometric mean method is used to determine the important degrees of the decision maker's requirements (Escobar et al, 2004). Let W f denoted the importance degree (weight) for the f th criteria, then:…”