Integrated Process for Developing and Selecting More or Less Better Products Based on QFD and MCGP

Table 1

Steps for implementing the QFD method.

Steps	Description
1	Identify CRs and TRs in the product design
2	Use the technical expertise of the group QFD for the determination of the central relation matrix (RM)
3	Get the weight for each customer demand from the AHP, this is
4	Calculate the relative importance (RIj) of TR in product development (TP) and weighting priority () using equations 1 and 2
	(1)
	(2)
	Here, RIj is the relation between the TP and the CRs specified by RM. In addition, is the importance level of TP in the service (j = 1, 2, …, m) and , , indicates the correlation between and “HOWs.”
5	Normalize the importance level of TRs to product design ()
6	Set up a pairwise comparison matrix for each TR designed for the product using AHP
7	To evaluate the weight of each candidate for each TR in the AHP, determine the pairwise comparison matrix for each TR in the product design
8	Using equation (3), find the total weight
	(3)
	Sj is the total score (or weight) for the product design alternative, and eij is the weight of the , the alternative for of TRs, in the product design
9	Based on the total score (or weight) obtained for each new product design candidate using equation (3), use the weight values obtained in Step 8 to set up the MCGP model (e.g., next subsection) and select the best candidate for the product design