Concurrent Product Design Based on Simultaneous Processing of Design and Manufacturing Information by Utility Analysis

1995 ◽  
Author(s):  
Masataka Yoshimura ◽  
Hideyuki Kondo
Keyword(s):  
Product Design ◽  
Design Procedure ◽  
Product Performance ◽  
Pareto Optimum ◽  
Manufacturing Cost ◽  
Utility Analysis ◽  
Satisfactory Level ◽  
Pareto Optimum Solution ◽  
Product Manufacturing ◽  
Optimum Solution

Abstract A methodology for concurrent decision making of factors concerning product design and product manufacturing is proposed for obtaining better product designs from a wider global viewpoint of the product performance and the product manufacturing cost according to the concept of concurrent engineering. In this method, first, a function expressing the satisfactory level of the manufacturing division and a function expressing the satisfactory level of the design division are formulated for the product design being regarded. Then, an integrated higher ranking decision making utility function is formulated using these two satisfactory level functions by the utility analysis. Next, Pareto optimum solution sets of the two multiobjective optimization problems of maximization of the product performance and minimization of the product manufacturing cost are obtained for alternative product designs. Finally, on the Pareto optimum solution curves, the values of the integrated satisfactory levels are obtained and the most preferable design solution is selected. An applied example of this concurrent design procedure is given to demonstrate it’s effectiveness in comparison to a conventional design procedure.

Fundamental Concepts for Product Designs Based on Pareto Optimum Solutions

2011 ◽  
Author(s):  
Masataka Yoshimura
Keyword(s):  
Design Optimization ◽  
Product Design ◽  
Optimal Designs ◽  
Pareto Optimum ◽  
Design Problems ◽  
Solution Sets ◽  
Pareto Optimum Solution ◽  
Design Solutions ◽  
Articulated Robots ◽  
Optimum Solution

This paper proposes fundamental concepts for goal-defined product designs, and practical methodologies for achieving optimal designs based these concepts. Also emphasized are the functions and significance of Pareto optimum solution sets in multi-objective optimizations during the execution of the proposed methodologies. Three main concepts for product design optimization are presented. First, the goal of the product design optimization is specified to obtain the best harmony of related (and often conflicting) characteristics, where Pareto optimum solution sets represent this harmony and more preferable degrees of harmony cause an increase in social profit. Second, to obtain design solutions that maximize the desired harmony, deeper level characteristics in the design optimization problem are derived based on simplification or decomposition of the usual surface level characteristics, and optimizations are initiated from these deeper levels where the most important and influential aspects of the design problems are easiest to recognize. The third concept entails the use of collaboration with specialist experts concerning the product characteristics, focusing on Pareto optimum solution sets obtained in deeper level optimizations, so that these experts can facilitate the development of more preferable results based on their own ideas and knowledge. The interrelationships between the second and third concepts are described and used to obtain globally optimal design solutions that have the highest degree of harmony for the required product design objectives. The proposed concepts and methodologies for product design optimizations are demonstrated using certain designs for articulated robots.

Design Optimization Considering Flexibility for Working Environment Based on Information of Pareto Optimum Solution Curvatures

1994 ◽  
Author(s):  
Masataka Yoshimura ◽  
Takatoshi Nishikawa
Keyword(s):  
Design Optimization ◽  
Optimization Problems ◽  
Working Environment ◽  
Product Performance ◽  
Design Solution ◽  
Pareto Optimum ◽  
Design Decision ◽  
Product Cost ◽  
Pareto Optimum Solution ◽  
Optimum Solution

Abstract This paper presents design decision making methods considering flexibility for change in the working environment. In order to make a clear evaluation of the changes in the optimum levels of the product cost and product performance due to changes in the working environment, three objective design optimization problems are constructed having the three objectives of minimization of the product cost, maximization of the product performance and maximization of flexibility for the working environment. The Pareto optimum solution set forming a curvature is obtained for the evaluation. Then, a method for determining the preferable design solution using information from the Pareto optimum solution curvature is presented. Finally, the proposed methods are applied to design examples for demonstrating effectiveness.

scholarly journals One Welfare State for Europe: A Costly Utopia?

2004 ◽  
Vol 4 (2) ◽  
pp. 1850020 ◽  
Author(s):  
Peter Hennessy ◽  
Thierry Warin
Keyword(s):  
Social Program ◽  
Pareto Optimum ◽  
Gdp Growth ◽  
The European Union ◽  
Social Expenditure ◽  
Asymmetric Shocks ◽  
Pareto Optimum Solution ◽  
Future Policy ◽  
Optimum Solution ◽  
Social Expenditures

This paper addresses the question of the social policy harmonization in the European Union. In adopting a common monetary policy, Europe is faced with structural and fiscal concerns, as national growth levels differ. Another possible factor in output shocks are the levels of various social expenditures in the member countries. OECD data on the level of social program expenditures in four EU countries will be compared to fluctuations in GDP growth to identify existing relationships. Significant relationships between independent social expenditure policy and GDP growth shocks suggest structural harmonization as an improvement if Europe is to take full advantage of the common market. However, the effects of expenditure levels may be easier to identify and predict than the dynamic effects of policy change. As the effects of future policy changes are more difficult to ascertain, harmonization may not consistently appear to be a Pareto-optimum solution to asymmetric shocks.

Decision Making in the Choosing of New Materials from the Standpoint of Machine Structural Dynamics

1989 ◽  
Vol 111 (1) ◽  
pp. 110-116 ◽  
Author(s):  
M. Yoshimura
Keyword(s):  
Decision Making ◽  
Structural Dynamics ◽  
Product Performance ◽  
Manufacturing Cost ◽  
New Materials ◽  
Fundamental Knowledge ◽  
Material Choice ◽  
New Material ◽  
Product Manufacturing ◽  
Selection Of

The use of a new material is a hopeful strategy for breaking through the barrier of improving the product performance and/or the lowering of the product manufacturing cost. However, if the definite decision making method for selection of materials has not been established, use of a new material may not result in enhancement of the product performance and/or reduction of the product manufacturing cost. This paper proposes a methodology for decision making of a material used in machine structures from the standpoint of structural dynamics. First, purposes for use of new materials and evaluative parameters for decision making of material choice are described, and fundamental knowledge and theorems for decision making are established. Then, general decision making procedures for material choice are constructed. Finally, for model cases of purposes for use of new materials, detailed decision procedures are explained using also some numerical examples.

Concurrent Design and Manufacturing for Mechanical Systems

1999 ◽  
Author(s):  
Kuang-Hua Chang ◽  
Javier Silva ◽  
Ira Bryant
Keyword(s):  
Decision Making ◽  
Product Development ◽  
Product Design ◽  
Development Process ◽  
Product Performance ◽  
Product Development Process ◽  
Concurrent Design ◽  
Manufacturing Cost ◽  
Design Decision ◽  
Design And Manufacturing

Abstract Conventional product development process employs a design-build-break philosophy. The sequentially executed product development process often results in a prolonged lead-time and an elevated product cost. The proposed concurrent design and manufacturing (CDM) process employs physics-based computational methods together with computer graphics technique for product design. This proposed approach employs Virtual Prototyping (VP) technology to support a cross-functional team analyzing product performance, reliability, and manufacturing cost early in the product development stage; and conducting quantitative trade-off for design decision making. Physical prototypes of the product design are then produced using Rapid Prototyping (RP) technique primarily for design verification purposes. The proposed CDM approach holds potential for shortening the overall product development cycle, improving product quality, and reducing product cost. A software tool environment that supports CDM for mechanical systems is being built at the Concurrent Design and Manufacturing Research Laboratory (http://cdm.ou.edu) at the University of Oklahoma. A snap shot of the environment is illustrated using a two-stroke engine example. This paper presents three unique concepts and methods for product development: (i) bringing product performance, quality, and manufacturing cost together in early design stage for design considerations, (ii) supporting design decision-making through a quantitative approach, and (iii) incorporating rapid prototyping for design verification through physical prototypes.

scholarly journals Energy Efficient Motion Design and Task Scheduling for an Autonomous Vehicle

2019 ◽  
Vol 1 (1) ◽  
pp. 2853-2862
Author(s):  
Elias Xidias ◽  
Philip Azariadis
Keyword(s):  
Task Scheduling ◽  
Energy Efficient ◽  
Autonomous Vehicle ◽  
Industrial Sector ◽  
Pareto Optimum ◽  
Optimization Strategy ◽  
Modified Genetic Algorithm ◽  
Pareto Optimum Solution ◽  
Optimum Solution ◽  
And Task

AbstractThis paper describes an approach for designing an energy efficient motion and task scheduling for an autonomous vehicle which is moving in complicated environments in industrial sector or in large warehouses. The vehicle is requested to serve a number of workstations while moving safely and efficiently in the environment. In the proposed approach, the overall problem is formulated as a constraint optimization problem by using the Bump-Surface concept. Then, a Pareto-based multi- objective optimization strategy is adopted, and a modified genetic algorithm is developed to determine the Pareto optimum solution. The efficiency of the developed method is investigated and discussed through simulated experiments.

Decision Making in the Choosing of New Materials From the Standpoint of Machine Structural Dynamics

1987 ◽  
Author(s):  
M. Yoshimura
Keyword(s):  
Decision Making ◽  
Structural Dynamics ◽  
Product Performance ◽  
Manufacturing Cost ◽  
New Materials ◽  
Fundamental Knowledge ◽  
Material Choice ◽  
New Material ◽  
Product Manufacturing ◽  
Selection Of

Abstract The use of a new material is a hopeful strategy for breaking through the barrier of improving the product performance and/or the lowering of the product manufacturing cost. However, if the definite decision making method for selection of materials has not been established, use of a new material may not result in enhancement of the product performance and / or reduction of the product manufacturing cost. This paper proposes a methodology for decision making of a material used in machine structures from the standpoint of structural dynamics. First, purposes for use of new materials and evaluative parameters for decision making of material choice are described, and fundamental knowledge and theorems for decision making are established. Then, general decision making procedures for material choice are constructed. Finally, for model cases of purposes for use of new materials, detailed decision procedures are explained using also some numerical examples.

Flexible Optimization of Machine Products Considering the Working Environment

1996 ◽  
Author(s):  
Masataka Yoshimura ◽  
Takatoshi Nishikawa
Keyword(s):  
Decision Maker ◽  
Optimization Method ◽  
Working Environment ◽  
Design Stage ◽  
Design Solution ◽  
Pareto Optimum ◽  
Manufacturing Cost ◽  
Preference Structure ◽  
Tradeoff Analysis ◽  
Pareto Optimum Solution

Abstract In order to obtain product designs which enhance the flexibility for change in the working environment of the product, a flexible design optimization method is proposed in which any change is clearly evaluated at the design stage. Here, a criterion of maximization of the flexibility for the product working environment is added to the conventional criteria such as the product performance and the manufacturing cost and a multiobjective optimization problem is formulated. The influence that enhancing flexibility has on the other characteristics is integratedly evaluated by the tradeoff analysis of the Pareto optimum solution set. Then, the preference structure of the decision maker is formulated by the preference function for each evaluative characteristic. The preference functions are interactively modified based on the tradeoff analysis between the evaluative characteristics. The solution most sufficiently reflecting the preference structure of the decision maker is finally determined as the design solution.

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