scholarly journals Making design decisions under uncertainties: probabilistic reasoning and robust product design

2021 ◽  
Author(s):  
Paul Christoph Gembarski ◽  
Stefan Plappert ◽  
Roland Lachmayer
Keyword(s):  
Product Development ◽  
Product Life Cycle ◽  
Probabilistic Reasoning ◽  
Late Phase ◽  
Development Project ◽  
Product Development Process ◽  
Bayesian Decision ◽  
Rotary Valve ◽  
Design Decisions ◽  
Decision Network

AbstractMaking design decisions is characterized by a high degree of uncertainty, especially in the early phase of the product development process, when little information is known, while the decisions made have an impact on the entire product life cycle. Therefore, the goal of complexity management is to reduce uncertainty in order to minimize or avoid the need for design changes in a late phase of product development or in the use phase. With our approach we model the uncertainties with probabilistic reasoning in a Bayesian decision network explicitly, as the uncertainties are directly attached to parts of the design artifact′s model. By modeling the incomplete information expressed by unobserved variables in the Bayesian network in terms of probabilities, as well as the variation of product properties or parameters, a conclusion about the robustness of the product can be made. The application example of a rotary valve from engineering design shows that the decision network can support the engineer in decision-making under uncertainty. Furthermore, a contribution to knowledge formalization in the development project is made.

scholarly journals Early Robust Design—Its Effect on Parameter and Tolerance Optimization

2021 ◽  
Vol 11 (20) ◽  
pp. 9407
Author(s):  
Stefan Goetz ◽  
Martin Roth ◽  
Benjamin Schleich
Keyword(s):  
Product Development ◽  
Robust Design ◽  
Product Development Process ◽  
Design Parameters ◽  
Concept Design ◽  
Design Decisions ◽  
Dynamic Markets ◽  
Tolerance Optimization ◽  
Qualitative Approaches ◽  
Design Activities

The development of complex products with high quality in dynamic markets requires appropriate robust design and tolerancing workflows supporting the entire product development process. Despite the large number of methods and tools available for designers and tolerance engineers, there are hardly any consistent approaches that are applicable throughout all development stages. This is mainly due to the break between the primarily qualitative approaches for the concept stage and the quantitative parameter and tolerance design activities in subsequent stages. Motivated by this, this paper bridges the gap between these two different views by contrasting the used terminology and methods. Moreover, it studies the effects of early robust design decisions with a focus on Suh’s Axiomatic Design axioms on later parameter and tolerance optimization. Since most robust design activities in concept design can be ascribed to these axioms, this allows reliable statements about the specific benefits of early robust design decisions on the entire process considering variation in product development for the first time. The presented effects on the optimization of nominal design parameters and their tolerance values are shown by means of a case study based on ski bindings.

Toward a Method for Improving Product Architecture Solutions by Integrating Designs for Assembly, Disassembly and Maintenance

2012 ◽  
Author(s):  
Andreas Dagman ◽  
Rikard Söderberg
Keyword(s):  
Life Cycle ◽  
Product Development ◽  
Product Life Cycle ◽  
Development Process ◽  
Business Models ◽  
Design Guidelines ◽  
Product Development Process ◽  
Product Architecture ◽  
Manufacturing Companies ◽  
Maintenance And Repair

New customer demands and increased legislation drive business-oriented companies into new business models focusing on the entire life cycle of the product. This forces the manufacturing companies into service-oriented solutions as a compliment to the original business areas. Takata [1] postulates that “the goal is no longer to produce products in an efficient way, but rather to provide the functions needed by society while minimizing material and energy consumption”. This new situation affects the product requirements as well as product development process (PD). When focusing on the entire product life cycle, product aspects such as maintenance and repair will receive more attention since the companies will be responsible for them. In the product development process of today, especially in the automotive industry, maintenance and repair aspects (repair and maintenance methods and manuals, for example) are currently taken care of when the product is more or less fully developed. Maintenance and repair requirements are difficult to quantify in terms of core product properties (for vehicles, cost, CO2 emissions, weight, and so on). This leads to difficulties in equally considering maintenance and repair requirements while balancing vast amounts of product requirements. This paper focuses on a comparison and discussion of existing design guidelines affecting the structure and organization of parts in an assembled consumer product, such as Design for Assembly (DFA), Design for Maintenance (DFMa), Design for Service (DFS) and Design for Disassembly (DFD) methods. A tool for evaluation and analyzing product architecture as well as assemblability and maintainability is proposed.

Optimal Design Decisions in Product Portfolio Valuation

2002 ◽  
Author(s):  
Panayotis Georgiopoulos ◽  
Ryan Fellini ◽  
Michael Sasena ◽  
Panos Y. Papalambros
Keyword(s):  
Product Development ◽  
Optimal Designs ◽  
Product Development Process ◽  
Product Portfolio ◽  
Design Decisions ◽  
Business Decisions ◽  
Business Context ◽  
Valuation Process ◽  
Product Valuation ◽  
Portfolio Valuation

Product portfolio valuation is a core business milestone in a firm’s product development process: Determine what will be the final value to the firm derived from allocating assets into an appropriate product mix. Optimal engineering design typically deals with determining the best product based on technological (and, occasionally, cost) requirements. Linking technological with business decisions allows the firm to follow a product valuation process that directly considers not only what assets to invest but also what are the appropriate physical properties of these assets. Thus, optimal designs are determined within a business context that maximizes the firm’s value. The article demonstrates how this integration can be accomplished analytically using a simple example in automotive product development.

Study on the Development Model of Green Products Based on Concurrent Engineering

2014 ◽  
Vol 1037 ◽  
pp. 540-543
Author(s):  
Xi Yin Lou
Keyword(s):  
Life Cycle ◽  
Product Development ◽  
Concurrent Engineering ◽  
Product Life Cycle ◽  
Technical Information ◽  
Product Development Process ◽  
Green Products ◽  
Engineering Product ◽  
Resource Information ◽  
Information Energy

concurrent engineering product development from the beginning of the design requirements, it must consider the various factors in the product life cycle, to shorten product development cycle, improve product quality, reduce the green characteristics of product cost, product realization, enhancing the competition ability of the enterprise purpose. Because in the whole process of product lifecycle highly concurrent engineering station, effect that participants work together, reconstruction of product development process and using advanced design methods, contributes to the technical information, economic information, environmental information, energy and resource information and insurance information of organic integration of each stage in the life cycle of product green design, the realization of green products from a life-cycle perspective. Therefore, the concurrent engineering is the core of the design and development of green products.

Conceptual Model Driven Architecture to Support Global Product Development

2008 ◽  
Author(s):  
Javier Pereda ◽  
Mauricio Hincapie ◽  
Arturo Molina
Keyword(s):  
Product Development ◽  
Conceptual Model ◽  
Development Process ◽  
Manufacturing System ◽  
System Development ◽  
Development Project ◽  
Product Development Process ◽  
Model Driven Architecture ◽  
Model Driven ◽  
Product Development Project

For a rapid configuration of a given product development process, taking into account today unavoidable market’s requirements as is the integrated product, process and manufacturing system development considering their entire lifecycles, in this paper, an enterprise holistic framework, consisting in a three dimensional model, is described to support the model driven architecture (MDA) concept for global product development projects (GPDP). The holistic framework has been established based on the integration of three fundamental areas of research: concurrent engineering (CE), product lifecycle, and enterprise integration engineering (EIE). The integration of these three fields of knowledge, using a 3D holistic framework, generates a solid support for a model driven architecture. As a result, through a 3D matrix, more important elements of the product development process can be combined and modeled following their natural interactions through the project realization. Questions about a global product development project like: What needs to be developed? Who will develop it? Where will be developed? How will be developed? When is being developed? can be generated during the planning and execution of the project but, as part of this research effort, these questions are answered in an organized manner using the proposed enterprise holistic framework. The conceptual model (enterprise holistic framework) for the global product development project was established as a base to capture, store and configure a project including the integration of product, manufacturing process and manufacturing system development considering their entire lifecycles in the enterprise context.

Low Cost Demonstrator as a Mean for Rapid Product Realization With an Electric Motorcycle Application

2005 ◽  
Author(s):  
Peter Hallberg ◽  
Petter Krus ◽  
Lars Austrin
Keyword(s):  
Product Development ◽  
Low Cost ◽  
Development Project ◽  
Product Development Process ◽  
Time Saving ◽  
Engineering Programs ◽  
Industrial Project ◽  
Product Development Project ◽  
Educational Engineering ◽  
Product Realization

During the last decade, digital prototyping has become a natural part of any industrial project dealing with product development. The reasons for this differ, but the two most obvious is time saving aspects and the amount of cost effectiveness achieved when replacing the physical prototype with the cheaper digital. Time and cost are equally, or even more critical in academic projects. This paper describes the usage of a low cost demonstrator as a mean to reduce both time and cost during a product development project course as well as to guarantee educational quality. The paper also discusses the reason for using demonstrators in an industrial environment. When large product development project courses are given at educational engineering programs, they often strive for imitating a real industrial situation, trying to include all the phases and aspects of product realization. Time is of course critical in both environments, industrial and academic, but for slightly different reasons. A typical industrial project may run over several years while a large educational project’s duration is counted in months. Thus, if the course tutor wants to simulate the whole product development process, within the same project course, there are needs for means that may speed up the project without spoiling the educational message as well as the industrial authenticity.

Knowledge Driven Design Features for the Product Life Cycle of Engine Parts

2009 ◽  
Author(s):  
Jan Tim Jagenberg ◽  
Erik A. Gilsdorf ◽  
Reiner Anderl ◽  
Thomas Bornkessel
Keyword(s):  
Product Development ◽  
Product Life Cycle ◽  
Relevant Information ◽  
Product Development Process ◽  
Design Decision ◽  
Aero Engine ◽  
Early Design Stages ◽  
Design Systems ◽  
Development Phases ◽  
Made In

The high competitive pressure in the aero-engine market demands higher quality products in shorter time at lower costs. In order to achieve this, a close integration of the product lifecycle with early design stages is necessary. Decisions made in design have an impact on later lifecycle areas like manufacturing and aftermarket, which a design may not foresee without the relevant information. This leads to avoidable iterations in the product development process. This paper illustrates a concept for a design decision support system on feature level. Key knowledge of different design domains is provided within the available design systems during the product development phases.

Collaborative Engineering System Supporting Product Development Process

2003 ◽  
Author(s):  
Hong-Seok Park ◽  
Gyu-Bong Lee ◽  
Hyun Kim
Keyword(s):  
Product Development ◽  
Product Life Cycle ◽  
Development Time ◽  
Development Process ◽  
Product Development Process ◽  
Engineering System ◽  
Common Goal ◽  
Collaborative System ◽  
Collaborative Environment ◽  
Efficient Communication

Since customer’s demand is various and product life cycle is getting shorter, many manufacturing company is trying to reduce product development time and cost. The processes of product development involve a large number of components and the interaction of multiple technologies. For the above reasons, companies make an effort to design product on collaborative environment. The various activities in a product development are highly distributed. This distributed nature of the activities implies that teams will be working in different place and technical environment. Thus at a given time, teams might work on the same product from different perspectives. This will require efficient communication amongst the various individuals and the various software tools that are used by them. Therefore, there is a need for collaborative system that can support distributed design such that participants from different background collaborate towards one common goal. IT (Information Technology) is the foundation for collaborative system. In this paper the development of an enterprise-specific collaboration-strategy including process oriented co-operations in product development will be presented. This strategy particularly comprises new customer-oriented functionalities, tools for supporting collaborative product development as well as a systematic support for an implementation of collaborative system.

Consideration about the Determination and Control of the Key Characteristics as Part of Planning Quality of the Product Development Process

2015 ◽  
Vol 809-810 ◽  
pp. 1269-1274 ◽  
Author(s):  
Daniel Tiuc ◽  
George Draghici ◽  
Alina Parvu ◽  
Bianca Enache
Keyword(s):  
Product Development ◽  
Product Life Cycle ◽  
Product Development Process ◽  
Customer Requirements ◽  
Effect Analysis ◽  
Control Plan ◽  
Key Characteristics ◽  
And Control ◽  
The Impact

Due to the complexity of the product development increasing in Automotive Industry, the key characteristics of the product or manufacturing process become more and more important in the product life cycle. The importance of identification of key characteristics is considerably because of the impact that can occur in costs, product reliability, environment and safety. Each key characteristic is determined according to customer requirements and is controlled and monitored during production phase in order to secure the quality of the product. The identification of key characteristics is performed by a team, after the analysis of customer requirements, norms and regulations requirements and international organization requirements. The key characteristics are marked by a special marking and should be ensured a traceability of key characteristics through impacted documents (drawings, FMEAs (Failure Mode and Effect Analysis), control plan, work instructions etc.).

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