Towards Rules for Functional Composition

Caldwell, Benjamin W.; Mocko, Gregory M.

doi:10.1115/detc2008-49904

Cited by 8 publications

(13 citation statements)

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“…The metric, Table 1. Classification of composition rules according to Gill et al (2016) and Caldwell and Mocko (2008) CR9 Combine adjacent convert functions if the output flows of the first function block are identical to the inputs of the second function block. similarity, measures the similarity of two chain models, and because chain models may be of different lengths in the comparison, similarity is defined in Eq.…”

Section: The Similarity Metricmentioning

confidence: 99%

Transforming functional models to critical chain models via expert knowledge and automatic parsing rules for design analogy identification

Agyemang

Linsey

Turner

2017

AIEDAM

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Critical chains composed of critical flows and functions have been demonstrated as an effective qualitative analogy retrieval approach based on performance metrics. In prior work, engineers used expert knowledge to transform functional models into critical chain models, which are abstractions of the functional model. Automating this transformation process is highly desirable so as to provide for a robust transformation method. Within this paper, two paradigms for functional modeling abstraction are compared. A series of pruning rules provide an automated transformation approach, and this is compared to the results generated previously through an expert knowledge approach. These two approaches are evaluated against a set of published functional models. The similarity of the resulting transformation of the functional models into critical chain models is evaluated using a functional chain similarity metric, developed in previous work. Once critical chain models are identified, additional model evaluation criteria are used to evaluate the utility of the critical chain models for design analogy identification. Since the functional vocabulary acts as a common language among designers and engineers to abstract and represent critical design artifact information, analogous matching can be made about the functional vocabulary. Thus, the transformation of functional models into critical chain models enables engineers to use functional abstraction as a mechanism to identify design analogies. The critical flow rule is the most effective first step when automatically transforming a functional model to a critical chain model. Further research into more complex critical chain model architectures and the interactions between criteria is merited.

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Section: The Similarity Metricmentioning

confidence: 99%

Transforming functional models to critical chain models via expert knowledge and automatic parsing rules for design analogy identification

Agyemang

Linsey

Turner

2017

AIEDAM

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“…Further, a review of function models in a design repository found that most of the models were generated through reverse engineering (Bohm et al, 2005, 2008). To address the challenge of pruning reverse engineering based function models to their core elements, a set of rules were developed (Caldwell & Mocko, 2008). In addition, the products whose function structures have been used in this study have all been developed using reverse engineering.…”

Section: Pruning Function Structures: New Function Representationsmentioning

confidence: 99%

“…When a function structure undergoes functional pruning, function blocks are removed and the function flows are rerouted accordingly. The pruning is carried out in accordance with the rules that have been previously developed (Caldwell & Mocko, 2008). It is important to understand that these rules were developed empirically.…”

Section: Pruning Function Structures: New Function Representationsmentioning

confidence: 99%

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Comparing function structures and pruned function structures for market price prediction: An approach to benchmarking representation inferencing value

Gill

Summers

Turner

2017

AIEDAM

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Benchmarking function modeling and representation approaches requires a direct comparison, including the inferencing support by the different approaches. To this end, this paper explores the value of a representation by comparing the ability of a representation to support reasoning based on varying amounts of information stored in the representational components of a function structure: vocabulary, grammar, and topology. This is done by classifying the previously developed functional pruning rules into vocabulary, grammatical, and topological classes and applying them to function structures available from an external design repository. The original and pruned function structures of electromechanical devices are then evaluated for how accurately market values can be predicted using the graph complexity connectivity method. The accuracy is found to be inversely related to the amount of information and level of detail. Applying the topological rule does not significantly impact the predictive power of the models, while applying the vocabulary rules and the grammar rules reduces the accuracy of the predictions. Finally, the least predictive model set is that which had all rules applied. In this manner, the value of a representation to predict or answer questions is quantified.

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“…To represent product function, the Functional Basis and the associated flow based functional modeling methodology are used [20,46]. The Functional Basis has achieved significant evaluation and acceptance as a repeatable method for representing product function [47][48][49][50][51][52][53]. Good summaries of discussions on how to use the flow based modeling method can be found in [54].…”

Section: Modeling the Productmentioning

confidence: 99%

Adapting ADA Architectural Design Knowledge to Product Design: Groundwork for a Function Based Approach

Sangelkar

McAdams

2010

Volume 5: 22nd International Conference on Design Theory and Methodology; Special Conference on Mechanical Vibration and Noise

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Adapting ADA Architectural Design Knowledge to Product Design: Groundwork for a Function Based Approach. (August 2010) Shraddha Chandrakant Sangelkar, B. Tech., Veermata Jijabai Technological Institute, India Chair of Advisory Committee: Dr. Daniel A. McAdams Disability is seen as a result of an interaction between a person and that person's contextual factors. Viewing disability in the context of the built environment, a better design of this environment helps to reduce the disability faced by an individual. In spite of significant research in Universal Design (UD), the existing methods provide insufficient guidance for designers: designers demand more specific examples of, and methods for, good universal design.Within the overarching goal of improving universal product design, the specific goal of this research is to determine if the ADA guidelines for architectural design can be adapted to product design. A methodology that foresees the accessibility issues while designing a product would be constructive. The new technique should be built on the pre-existing principles and guidelines.A user activity and product function framework is proposed for this translation using actionfunction diagrams. Specific goals include determining if the function-based approach is able to anticipate a functional change that improves product accessibility. iv Further, generate user activity and product function association rules that can be applied to the universal design of products.Proposed research activities are to identify thirty existing universal products and compare with its typical version to identify the function that introduces an accessibility feature. Next, categorize the observed changes in a product function systematically and extract trends from accessible architectural systems to generate rules for universal design of consumer products. For validation, the task is to select around fifteen consumer product pairs for validation of the generated rules to determine if the ADA guidelines can be adapted for universal product design using the proposed framework. The results of this research show promise in using the International Classification of Functioning, Disability and Health (ICF) lexicon to model user limitation. The actionfunction diagram provides a structured way to approach a problem in the early stage of design. The rules generated in this research translate to products having similar user-product interface. v DEDICATION To my father vi ACKNOWLEDGEMENTS

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Towards Rules for Functional Composition

Cited by 8 publications

References 0 publications

Transforming functional models to critical chain models via expert knowledge and automatic parsing rules for design analogy identification

Transforming functional models to critical chain models via expert knowledge and automatic parsing rules for design analogy identification

Comparing function structures and pruned function structures for market price prediction: An approach to benchmarking representation inferencing value

Adapting ADA Architectural Design Knowledge to Product Design: Groundwork for a Function Based Approach

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