Limitations of the House of Quality to provide quantitative design information
International Journal of Quality & Reliability Management
ISSN: 0265-671X
Article publication date: 25 January 2008
Abstract
Purpose
The House of Quality (HoQ) is a popular design tool that supports information processing and decision making in the engineering design process. While its application is an aid to conceptual aspects of the design process, its use as a quantitative information tool in engineering design is potentially flawed. This flaw is a result of potential designer interpretation of the HoQ results – interpretation which is invalid given the assumptions and information sources behind the HoQ – and is viewed as a critical limitation on the results of the method which can lead to potentially invalid and/or poor decisions. In this paper this limitation and its implications are explored both experimentally and through simulated application.
Design/methodology/approach
The approach taken in this research is to first study the HoQ through a “digital experiment” in order to identify the key factors that drive the quantitative results within the tool. Based on the results of the experiment, an example HoQ for a hair dryer is used to empirically study the resulting dangers of the quantitative information which results from the HoQ.
Findings
Through this research study of the HoQ, it is determined that while the tool offers conceptual support to the design process, the quantitative information that results is largely invalid.
Research implications/limitations
For the research community the results in this paper create motivation for continued improvement of the HoQ tool from a conceptual, qualitative design aid to a sound quantitative tool. The results indicate exactly where the methodology must be improved.
Originality/value
For users of QFD, specifically the HoQ, the results of this research provide evidence to the limitations of the tool in providing quantitative information for design.
Keywords
Citation
Olewnik, A. and Lewis, K. (2008), "Limitations of the House of Quality to provide quantitative design information", International Journal of Quality & Reliability Management, Vol. 25 No. 2, pp. 125-146. https://doi.org/10.1108/02656710810846916
Publisher
:Emerald Group Publishing Limited
Copyright © 2008, Emerald Group Publishing Limited