A.C. Benim, K. Ozkan, M. Cagan and D. Gunes
The main purpose of the paper is the validation of a broad range of RANS turbulence models, for the prediction of flow and heat transfer, for a broad range of boundary conditions…
Abstract
Purpose
The main purpose of the paper is the validation of a broad range of RANS turbulence models, for the prediction of flow and heat transfer, for a broad range of boundary conditions and geometrical configurations, for this class of problems.
Design/methodology/approach
Two‐ and three‐dimensional computations are performed using a general‐purpose CFD code based on a finite volume method and a pressure‐correction formulation. Special attention is paid to achieve a high numerical accuracy by applying second order discretization schemes and stringent convergence criteria, as well as performing sensitivity studies with respect to the grid resolution, computational domain size and boundary conditions. Results are assessed by comparing the predictions with the measurements available in the literature.
Findings
A rather unsatisfactory performance of the Reynolds stress model is observed, in general, although the contrary has been expected in this rotating flow, exhibiting a predominantly non‐isotropic turbulence structure. The best overall agreement with the experiments is obtained by the k‐ω model, where the SST model is also observed to provide a quite good performance, which is close to that of the k‐ω model, for most of the investigated cases.
Originality/value
To date, computational investigation of turbulent jet impinging on to “rotating” disk has not received much attention. To the best of the authors' knowledge, a thorough numerical analysis of the generic problem comparable with present study has not yet been attempted.
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Manuel de Mier and Fernando Delbianco
Existing classifications of inflationary regimes often rely on subjective judgments, hindering objectivity and accuracy. This study proposes a novel, data-driven approach to…
Abstract
Purpose
Existing classifications of inflationary regimes often rely on subjective judgments, hindering objectivity and accuracy. This study proposes a novel, data-driven approach to address this limitation.
Design/methodology/approach
We combine unsupervised clustering and classification tree methods to analyze Argentine inflation data from 1943 to 2022. Two smoothing techniques are introduced: a measure of temporal contiguity and a rolling majority rule method. The resulting regimes are compared to existing classifications based on their explanatory power for inflation-relative price variability.
Findings
Our method identifies distinct inflationary regimes, demonstrating significant improvement in objectivity and accuracy compared to existing literature. The regimes capture key historical periods and exhibit a strong association with inflation-relative price variability, providing valuable insights into Argentine inflation dynamics.
Originality/value
This study offers a novel methodological framework for constructing objective and accurate inflationary regimes, free from subjective biases. This approach holds potential for application to other contexts and contributes to a more nuanced understanding of inflation dynamics.
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Generative Production Systems are generative design computation that is linked to optimal physical production. They can improve the design and production of products which have…
Abstract
Purpose
Generative Production Systems are generative design computation that is linked to optimal physical production. They can improve the design and production of products which have unique geometries. The purpose of this paper is to introduce a preliminary methodology for Generative Production Systems.
Design/methodology/approach
The paper takes the form of a literature review investigating the structures and formats of successful methodologies. The literature review also investigates Generative Production Systems' theoretical foundations, development and implementations.
Findings
The potential of Generative Production Systems is restricted because enabling information is fragmented and difficult to access. In other fields, such barriers have been overcome through the introduction of methodologies that provide guiding principles, rules and strategies (P‐R‐S). The P‐R‐S type of methodology structure is suitable for Generative Production Systems.
Practical implications
The use of Generative Production Systems requires more upfront investment than the use of CAD/CAM software packages. However, they require little, or no, human input after they are set‐up. The preliminary methodology provides structured guidance about how to set up a Generative Production System. Further, the explanatory text enables wider understanding of Generative Production Systems, and how they can improve design and production.
Originality/value
An analysis is provided for the structure and format of successful methodologies in general. A preliminary methodology for Generative Production Systems is introduced. Further, the paper provides an overview of the disadvantages and advantages of Generative Production Systems compared to typical CAD/CAM software packages.
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Zachary Ball, Jonathan Cagan and Kenneth Kotovsky
This study aims to gain a deeper understanding of the industry practice to guide the formation of support tools with a rigorous theoretical backing. Cross-functional teams are an…
Abstract
Purpose
This study aims to gain a deeper understanding of the industry practice to guide the formation of support tools with a rigorous theoretical backing. Cross-functional teams are an essential component in new product development (NPD) of complex products to promote comprehensive coverage of product design, marketing, sales, support as well as many other activities of business. Efficient use of teams can allow for greater technical competency coverage, increased creativity, reduced development times and greater consideration of ideas from a variety of stakeholders. While academics continually aspire to propose methods for improved team composition, there exists a gap between research directions and applications found within industry practice.
Design/methodology/approach
Through interviewing product development managers working across a variety of industries, this paper investigates the common practices of team utilization in an organizational setting. Following these interviews, this paper proposes a conceptual two-dimensional management support model aggregating the primary drivers of team success and providing direction to systematically address features of team management and composition.
Findings
Based on this work, product managers are recommended to continually address the positioning of members throughout the entire NPD process. In the early stages, individuals are to be placed to work on project components with explicit consideration toward the perceived complexity of tasks and individual competency. Throughout the development process, individuals’ positions vary based on new information while continued emphasis is placed on maintaining a shared understanding.
Originality/value
Bridging the gap between theory and application within product development teams is a necessary step toward improved product develop. Industrial settings require practical solutions that can be applied economically and efficiently within their organization. Theoretical reflections postulated by academia support improved team design; however, to achieve true success, they must be applicable when considering product development.
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In financial markets investors and borrowers are faced with a whole structure of prices and interest rates on financial instruments. The determination of equilibria in these…
Abstract
In financial markets investors and borrowers are faced with a whole structure of prices and interest rates on financial instruments. The determination of equilibria in these markets is a complex process and presents a challenge to researchers and practitioners alike. In this article we are concerned with a single section of these markets where we study the relationships between the interest rates or yields on financial securities which can be distinguished from each other (as far as possible) only by their term to maturity. We only cover the structure of money or nominal yields, as an examination of the real returns would require another arti‐cle in itself.
Martin Ondra, David Škaroupka and Jan Rajlich
This paper aims to study the appearance of drills from one brand by using currently available design tools. It aims to find and discuss the relationship between appearance…
Abstract
Purpose
This paper aims to study the appearance of drills from one brand by using currently available design tools. It aims to find and discuss the relationship between appearance innovation and maintaining key design features.
Design/methodology/approach
The innovation process is studied on drills of a Czech power tool maker and a previously created concept of a new drill. First, the authors explore the similarities between the designed concept and previous models of the brand by calculating the degree of similarity of given shape features. Second, they capture the drills simple shape grammar and strive to generate a sketch of the concept.
Findings
Results show the use of several similar shape features from previous models in the innovated design. Shape grammar can create a principally similar concept, but some innovations cannot be achieved this way. A description of appearance innovation within brand identity in terms of shape grammar is given.
Research limitations/implications
The research is limited mainly to a small group of previous products that can be analyzed. It is done only for one particular brand identity. When used with the shape grammars, design generation is limited.
Practical implications
Better understanding of the innovative process aids designers in working with designs for brand identity and may serve to shape grammar enhancement.
Originality/value
The paper describes what happens during the innovation of product appearance and implicates enhancement and meaning of design analysis done by shape grammars and exploring similarities.
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Peter Boatwright, Jonathan Cagan, Dee Kapur and Al Saltiel
The primary purpose of this study is to illustrate an analytical method to identify tangible and intangible customer values and to translate those values into brand identity…
Abstract
Purpose
The primary purpose of this study is to illustrate an analytical method to identify tangible and intangible customer values and to translate those values into brand identity differentiators and product specifications.
Design/methodology/approach
The authors adapt a product development analysis tool, the Value Opportunity Analysis (VOA), to the design of a brand identity, illustrating the use of the tool in a case study with International Truck and Engine.
Findings
The paper illustrates how the VOA was used as a tool for evaluating and crafting both a brand identity, and shows how the brand identity translates into product specifications so that products embody, communicate, and deliver the brand identity.
Research limitations/implications
Although the VOA has been used in diverse markets (business to business, consumer software, physical product), in this article the VOA is illustrated in the context of brand identity for physical products. Future studies should illustrate how the application of the method may vary across domains.
Practical implications
This approach will appeal to executives, brand managers and product managers who have a goal of maintaining a differentiated brand identity and clearly delivering brand values through the products in the brand portfolio.
Originality/value
Products serve as influential sources of information about a brand's identity. The paper treats the brand as a product to be designed, adapting an analytical approach to translate customer value into brand identity and ultimately into the specification of the products, to ensure that all are aligned to answer the marketplace needs in a way that differs from competitors.
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This chapter focuses on practical considerations for organizations when endeavoring to invest in design, specifically how designers and their organizations should view their…
Abstract
This chapter focuses on practical considerations for organizations when endeavoring to invest in design, specifically how designers and their organizations should view their profession for the benefit of corporate innovation. Given the lack of consensus regarding what strategic design entails, the author interviewed strategic designers from across the United States to solicit their opinions on design thinking, strategic design, and design strategy, the relationship between those concepts, and how those concepts are, could be, and should be reflected in practice.
The overarching purpose of this chapter is to explore the relatively nascent profession of strategic design, from which the author distinguishes design strategy, as well as to provide guidance regarding how design and designers should be viewed and supported by the leadership of their organizations in order to fully empower them to support innovation. In addition, this chapter serves to better define the concepts of design thinking, strategic design, and design strategy. While design as a discipline is broad, for the sake of consistency, the author discusses design in the context of technological development and, in turn, in terms of human-computer interaction.
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The purpose of the paper is to analyze how a change towards product orientation based on an agile approach challenges, contrasts and/or coexists with other principles of…
Abstract
Purpose
The purpose of the paper is to analyze how a change towards product orientation based on an agile approach challenges, contrasts and/or coexists with other principles of organization and grouping, such as development projects, the existing hierarchical line structure and process management.
Design/methodology/approach
This is a case study of one organization, based on an explorative appoach.
Findings
Taking the competing dimension of coordination and principles of grouping as the starting point, this study identify, describe and analyze the tensions that result from the introduction of product organization. The product initiative has met many obstacles and tensions along four dimensions: Process, line, information technology units and development projects. For each of these dimensions a number of challenges have been identified, that contribute to increased complexity in the organization.
Research limitations/implications
A limitation of the study is that the findings cannot be generalized to other organizations.
Practical implications
A practical implication of the study is that product organization triggers tensions with other principles of organizations and grouping.
Originality/value
This study mainly contributes to the knowledge of agile management and agile organization, identifying and theorizing challenges that have been neglected and/or poorly understood both in the popular literature and in organizational research. This is particularly the case in the public sector. This study is also relevant to the domain of multidimensional structures, adding an understanding of the novel opportunities and challenges of product- and agile-based grouping of activities in an organization.