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| Title: | Sensitivity analysis of the rating scales and worth calculation schemes used in QFD matrices |
| Author (s): | Takai, Shun Ishii, K. |
| Department/Lab Affiliations: | Design Engineering Center Intelligent Systems Center Interdisciplinary Engineering |
| Keywords: | Concept selection QFD Rating scale Sampling with replacement Sensitivity analysis |
| Subject Terms: | Quality function deployment. |
| Issue Date: | 2004 |
| Publisher: | American Society of Mechanical Engineers (ASME) |
| Citation: | Takai, S., and Ishii, K., 2004, “Sensitivity Analysis of the Rating Scales and Worth Calculation Schemes Used in QFD Matrices,” Proceedings of 2004 ASME International Mechanical Engineering Congress and RD&D Exposition, Anaheim, CA. IMECE2004-61500. |
| Abstract: | Quality Function Deployment (QFD) is matrix method that identifies relative worth of product requirements from the customer requirements and their importance. Understanding the relative worth enables engineers to evaluate the potential of design concepts to achieve important requirements. In a QFD matrix called "House of Quality" or QFD I, engineers assess correlations between product requirements and customer requirements using a linear (e.g., 1-3-5) or an exponential (e.g., 1-3-9) rating scale. The exponential scale assigns product requirements that have large correlations with customer requirements a higher ratings of 9 instead of 5, and therefore, gives them larger relative worth. This paper studies how the choice of linear 1-3-5 and exponential 1-3-9 rating scales changes the relative worth of product requirements. To avoid being restricted to any specific pattern of a QFD matrix, this paper uses simulations and analytic approaches to obtain distributions of changes of relative worth, and to calculate the upper bounds of these changes. Finally, in an illustrative example, the authors integrate QFD and concept evaluation activities and provide a case in which the choice of rating scale in a QFD I matrix changes the optimal concept. |
| Type: | Article - Conference proceedings text |
| In Title: | Proceedings of 2004 ASME International Mechanical Engineering Congress and RD&D Exposition, |
| Copyright Notice: | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. FULL COPYRIGHT INFORMATION: |
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| title | Sensitivity analysis of the rating scales and worth calculation schemes used in QFD matrices |
| contributor.author | Takai, Shun |
| contributor.author | Ishii, K. |
| contributor.deptlab | Design Engineering Center |
| contributor.deptlab | Intelligent Systems Center |
| contributor.deptlab | Interdisciplinary Engineering |
| subject | Concept selection |
| subject | QFD |
| subject | Rating scale |
| subject | Sampling with replacement |
| subject | Sensitivity analysis |
| subject.LCSH | Quality function deployment. |
| date.issued | 2004 |
| publisher | American Society of Mechanical Engineers (ASME) |
| identifier.citation | Takai, S., and Ishii, K., 2004, “Sensitivity Analysis of the Rating Scales and Worth Calculation Schemes Used in QFD Matrices,” Proceedings of 2004 ASME International Mechanical Engineering Congress and RD&D Exposition, Anaheim, CA. IMECE2004-61500. |
| identifier.pub.URI | |
| description.abstract | Quality Function Deployment (QFD) is matrix method that identifies relative worth of product requirements from the customer requirements and their importance. Understanding the relative worth enables engineers to evaluate the potential of design concepts to achieve important requirements. In a QFD matrix called "House of Quality" or QFD I, engineers assess correlations between product requirements and customer requirements using a linear (e.g., 1-3-5) or an exponential (e.g., 1-3-9) rating scale. The exponential scale assigns product requirements that have large correlations with customer requirements a higher ratings of 9 instead of 5, and therefore, gives them larger relative worth. This paper studies how the choice of linear 1-3-5 and exponential 1-3-9 rating scales changes the relative worth of product requirements. To avoid being restricted to any specific pattern of a QFD matrix, this paper uses simulations and analytic approaches to obtain distributions of changes of relative worth, and to calculate the upper bounds of these changes. Finally, in an illustrative example, the authors integrate QFD and concept evaluation activities and provide a case in which the choice of rating scale in a QFD I matrix changes the optimal concept. |
| type | Article - Conference proceedings |
| type.DCMIType | text |
| type.status | Final version |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| rights.URI | |
| relation.isPartOf | Proceedings of 2004 ASME International Mechanical Engineering Congress and RD&D Exposition, |
| date.accessioned | 2007-04-11T17:00:48Z |
| date.available | 2008-05-09T15:04:08Z |
| identifier.persist.URI |