Commonality indices for product family design: a detailed comparison

Thevenot, Henri J.; Simpson, Timothy W.

doi:10.1080/09544820500275693

Cited by 138 publications

(70 citation statements)

References 9 publications

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“…A generalized commonality formulation avoids this restriction and allows for component sharing within subsets of the variants. The restricted definition is a simplifying assumption that is typically employed to decrease computational complexity; however, it imposes significant limitations that are often not observed in product family design practice (Thevenot and Simpson 2006). Therefore, there is a need for an approach capable of solving the joint problem using generalized commonality (box 6) for practical product family applications with a reasonable computational cost.…”

Section: Classification: Product Family Optimizationmentioning

confidence: 99%

Industrial application

2011

Ultracapacitor Applications

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Product family optimization involves not only specifying the platform from which the individual product variants will be derived, but also optimizing the platform design and the individual variants. Typically these steps are performed separately, but we propose an efficient decomposed multiobjective genetic algorithm to jointly determine optimal (1) platform selection, (2) platform design, and (3) variant design in product family optimization. The approach addresses limitations of prior restrictive component sharing definitions by introducing a generalized two-dimensional commonality chromosome to enable sharing components among subsets of variants. To solve the resulting high dimensional problem in a single stage efficiently, we exploit the problem structure by decomposing it into a two-level genetic algorithm, where the upper level determines the optimal platform configuration while each lower level optimizes one of the individual variants.

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Section: Classification: Product Family Optimizationmentioning

confidence: 99%

Industrial application

2011

Ultracapacitor Applications

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“…This phenomenon appears to affect platforms across industries, ranging from automotive to semiconductor capital equipment as summarized in Table 2.4. There is a large body of work on developing commonality metrics (Wacker and Trevelan 1986, Siddique et al 1998, Jiao and Tseng 2000, Thevenot and Simpson 2006), but descriptive studies tracking commonality indices over time are just beginning to emerge (Fixson 2007). A widely-cited example is the Joint Strike Fighter, a military aircraft designed with three variants, which was intended to share 80-90% parts commonality across all three variants.…”

Section: Planning For Divergencementioning

confidence: 99%

Crafting Platform Strategy Based on Anticipated Benefits and Costs

Cameron

Crawley

2013

Advances in Product Family and Product Platform Design

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“…This includes the degree of commonality index (DCI, [2]), the total constant commonality index (TCCI, [16]), the commonality index (CI, [17]), the component part commonality index (CI (C) , [18]), the product line commonality index (PCI, [19]), the percent commonality (%C, [20]), the generational variety index (GVI, [21]), the functional similarity index (FSI, [22,23]), and measures for the degree of variation [9,24,25]. An extensive comparison between many of these commonality indices and their usefulness for product family design (and redesign) can be found in [10], and a comprehensive list of existing commonality indices can be found in [26,27].…”

Section: Existing Metrics For Product Family Designmentioning

confidence: 99%

“…The optimal level of commonality is obtained by minimizing the non-value added variations across the products within a family without limiting the choices for customers in each market segment. From a more general view, the idea is to make each product within a family distinctive in ways that customers notice and is identical in ways that customers cannot see [10].…”

Section: Introductionmentioning

confidence: 99%

An Index-based Method to Manage the Tradeoff between Diversity and Commonality during Product Family Design

Thevenot

Alizon

Simpson

et al. 2007

Concurrent Engineering

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The competitiveness in today's market forces many companies to rethink the way they design products. Instead of developing one product at a time, many manufacturing companies are developing families of products to provide enough variety for the marketplace while keeping costs relatively low. Although the benefits of commonality are widely known, many companies are still not taking full advantage of it when developing new products or redesigning existing ones. One reason is the lack of appropriate methods and useful indices to assess a product family based on commonality and diversity. Although many component-based commonality indices have been proposed in the literature, they emphasize commonality at the expense of diversity in a product family. In this study, the design for commonality and diversity method based on two new commonality indices -the commonality diversity index and the comprehensive metric for commonality -is introduced to help designers manage the inherent tradeoff between commonality and diversity during the product family design process. To illustrate the proposed method, an example application involving a family of single-use cameras is presented. The proposed method provides useful recommendations at both the functional and component levels during product family design.

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Commonality indices for product family design: a detailed comparison

Cited by 138 publications

References 9 publications

Industrial application

Industrial application

Crafting Platform Strategy Based on Anticipated Benefits and Costs

An Index-based Method to Manage the Tradeoff between Diversity and Commonality during Product Family Design

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