Assessing and improving commonality and diversity within a product family

At a time when product differentiation is a major indicator of success in the global market, each company is looking to offer competitive and highly differentiated products. This differentiation issue is restricted by the design of platform-based products that share modules and/or components. It is not easy to differentiate products in a market that is often overwhelmed by numerous options. A platform-based approach can be risky because competition in the global market can become an internal competition among similar products within the family if there is not enough differentiation in the family. Thus, the goal for the product platform is to share elements for common functions and to differentiate each product in the family by satisfying different targeted needs. To assess commonality in the family, numerous indices have been proposed in the literature. Nevertheless, existing indices focus on commonality and reflect an increase in value when commonality increases but do not positively reflect an increase in the value as a result of diversity; hence, the commonality versus diversity index (CDI) is introduced in this paper to assess the commonality and diversity within a family of products or across families. The CDI has variable levels of depth analysis to help designers design or improve the product family. Two case studies using single-use cameras and power tool families highlight the usefulness of this new index.

[1]  Kristin L. Wood,et al.  Functional Interdependence and Product Similarity Based on Customer Needs , 1999 .

[2]  Mark Treleven,et al.  Component part standardization: An analysis of commonality sources and indices , 1986 .

[3]  B. J. Pine.  Mass customizing products and services , 1993 .

[4]  Timothy W. Simpson,et al.  A comprehensive metric for evaluating component commonality in a product family , 2007 .

[5]  Timothy W. Simpson,et al.  INTRODUCTION OF THE REUSE METHOD: RETRIEVING KNOWLEDGE FROM EXISTING PRODUCT DESIGNS , 2005 .

[6]  Zahed Siddique,et al.  A Tool to Integrate Design for Assembly During Product Platform Design , 2008 .

[7]  G. Boothroyd,et al.  Product Design for Manufacture and Assembly, Revised and Expanded , 2001 .

[8]  Timothy W. Simpson,et al.  A Variation-Based Method for Product Family Design , 2002 .

[9]  Claus Lewerentz,et al.  Applying design-metrics to object-oriented frameworks , 1996, Proceedings of the 3rd International Software Metrics Symposium.

[10]  Kristin L. Wood,et al.  A Quantitative Similarity Metric for Design-by-Analogy , 2002 .

[11]  Timothy W. Simpson,et al.  Commonality indices for product family design: a detailed comparison , 2006 .

[12]  Farrokh Mistree,et al.  Balancing Commonality and Performance within the Concurrent Design of Multiple Products in a Product Family , 2001, Concurr. Eng. Res. Appl..

[13]  Alain Delchambre,et al.  Integrated Design of a Product Family and Its Assembly System , 2003 .

[14]  Geoffrey Boothroyd,et al.  Product design for manufacture and assembly , 1994, Comput. Aided Des..

[15]  Mitchell M. Tseng,et al.  Understanding product family for mass customization by developing commonality indices , 2000 .

[16]  Kosuke Ishii,et al.  Design for variety: developing standardized and modularized product platform architectures , 2002 .

[17]  Marc H. Meyer,et al.  The power of product platforms : building value and cost leadership , 1997 .

[18]  Sridhar Kota,et al.  A Metric for Evaluating Design Commonality in Product Families , 2000 .

[19]  David A. Collier,et al.  THE MEASUREMENT AND OPERATING BENEFITS OF COMPONENT PART COMMONALITY , 1981 .

[20]  Janis Terpenny,et al.  Toward a multi-agent information management infrastructure for product family planning and mass customisation , 2005 .

[21]  Timothy W. Simpson,et al.  Two Methodologies for Identifying Product Platform Elements Within an Existing Set of Products , 2006, DAC 2006.

[22]  Mark V. Martin,et al.  DESIGN FOR VARIETY: DEVELOPMENT OF COMPLEXITY INDICES AND DESIGN CHARTS , 1998 .

[23]  Timothy W. Simpson,et al.  Introduction of a product family penalty function using physical programming , 2000 .

[24]  Timothy W. Simpson,et al.  Recommending a platform leveraging strategy based on the homogeneous or heterogeneous nature of a product line , 2010 .