New product development, Prototypes, Engineering design, Case studies, and Window blinds
This paper presents a case study of the design development of a new product, electrostatically actuated window blinds. The text presents a description of each stage in the prototype development followed by a discussion of different prototyping methods and design for manufacture and assembly issues. Results from electromechanical and thermal analyses of the product itself are also included. This case study determined that, for this product development, the most efficient, cost-effective prototyping solution was simple plastic injection moulding. It also concluded that following good design for manufacture and assembly practices during prototype construction will save time and money when transitioning to a production design. [ABSTRACT FROM AUTHOR]
Journal of Engineering Design. 1995, Vol. 6 Issue 1, p3. 14p. 3 Black and White Photographs, 1 Diagram.
Takes a broader view of rapid prototyping for proof-of-concept, as it applies to mechanical systems design. Exploration of the place of various physical prototyping media in the rapid development of solution concepts; Multi-faceted characterization of the act of prototyping; Resolution of design naivete.
Journal of Engineering Design. 1996, Vol. 7 Issue 1, p95. 8p. 2 Black and White Photographs, 7 Diagrams.
Prototype design & construction
Focuses on the use of feature-based designing (FBD) techniques in creating engineering prototypes. Investigation of links between FBD and rapid prototyping; Discussion of examples for applying FBD techniques; Outline of recommendations for the further development of the methodology.
Rapid prototyping, Prototypes, Manufacturing processes, Information resources management, Databases, and Information theory
The benefits of Rapid Prototyping technologies can be applied efficiently only when they are embedded in an entire product development process. Rapid Product Development (RPD)--an iterative process involving manufacturing and evaluation of rapid prototypes--is mostly characterized by decentralized design teams cooperating on a high degree of process parallelism. In practice, RPD processes often lack mechanisms to combine design results of different designers, and, therefore, information management and the integration of interdisciplinary knowledge are some of the most central problems in the RPD process. An approach for supporting the entire RPD process consists of providing designers with a common knowledge base that represents all information relevant in RPD. Such a knowledge base helps to establish a common understanding and support the communication and cooperation of design teams. A requirement analysis of engineering databases shows that conventional database concepts do not support the required functionality of this application domain sufficiently. Here, advanced database features, such as an advanced transaction concept or active modelling primitives representing the semantics of product data, are needed. This paper presents a knowledge database called the Active Semantic Network. The Active Semantic Network has been developed to face the special tasks of designers working in RPD processes. [ABSTRACT FROM AUTHOR]
COMPUTER-aided design, PRODUCT management, NEW product development, DIGITAL images, RAPID prototyping, and COMMERCIAL products
Computer-based representations of products offer potential time and cost savings in the early design stages of new product development. As technology progresses they offer considerable scope for co-designing, giving users a voice early in the design process. However, few studies address how users relate to such models. A laboratory-based study was conducted with 13 older users (six men and seven women) to investigate their understanding of model formats used at an early stage of prototyping (i.e. on-screen digital images and physical rapid prototyped (RP) models). The results indicate that users were able to identify the basic purpose or function of a familiar product from the 2D line drawings. However, perceptions of size, weight and materials were poor, particularly with a less familiar product. Essentially, finished RP models and 3D colour computer-aided design images were found to communicate products more completely to users and therefore useful for eliciting feedback. Unfinished models were found to be confusing to users, but elicited more frequent suggestions for improvements indicating a role in co-designing. Guidelines are put forward to encourage optimum use of these models and to facilitate communication between users and designers. [ABSTRACT FROM AUTHOR]
PRODUCT management, INDUSTRIAL research, RAPID prototyping, EXPERIMENTAL design, METHODOLOGY, and COMPETITIVE advantage in business
In the fuzzy front end stage of new product development, it is quite common that marketing personnel and product engineers have different goals and concerns. Their two sets of goals and concerns are always addressed in isolation from one another. This isolation typically would not result in optimal design decisions as two sets of goals and concerns are always interrelated. Therefore, it is important to integrate the concerns of marketing personnel with those of engineers in defining design specifications. Perceptual mapping is a very common technique used by marketing personnel to understand market positions of competitive products and help define new product opportunities. Although quite a few research works have been attempted to integrate marketing with engineering concerns for new product design, perceptual mapping was not considered in defining design specifications of a new product in the previous related studies. In this paper, a methodology of integrating marketing with engineering for defining design specifications of new products is described, which mainly involves generation of perceptual maps, generation of fuzzy regression models for relating customer requirements and design attributes, formulation of an optimisation model and solving the model based on genetic algorithms. A case study of defining design specifications of a new packing machine was used to illustrate the proposed methodology. [ABSTRACT FROM AUTHOR]
PRODUCT design, ENGINEERING, PRODUCT management, NEW product development, and RAPID prototyping
Most designs are modifications from previous products and lessons learned from earlier designs can be beneficial when developing new products. This paper introduces a support tool for the conceptual design phase, which is based on connectivity models of past designs and allows designers to assess the risk of change spreading between components and facilitates a visual analysis of these change models. Based on the example of a new generation of diesel engine design, this paper shows how the ability to predict change propagation can guide designers through conceptual design allowing them to analyse design alternatives and foresee potential problems arising from the product architecture. [ABSTRACT FROM AUTHOR]
Hannah, Rachel, Joshi, Shraddha, and Summers, JoshuaD.
Journal of Engineering Design. Jun2012, Vol. 23 Issue 6, p443-468. 26p. 8 Color Photographs, 6 Diagrams, 13 Charts, 2 Graphs.
ENGINEERING design -- Research, ENGINEERING models, PROTOTYPES, DRAWING, and IDENTIFICATION
In order to save time and money, designers need to understand the utility of different engineering representations. To this end, designers often rely on past experience to decide which model to construct; yet students without this experience have no help. Interestingly there are noticeable gaps in the research literature with respect to how and when to select representations for engineering design. This paper examines the differences between three types of engineering representations, specifically sketches, drawing packages, and physical prototypes. The amount of information designers can extract, in addition to the correctness and confidence, from these representations is studied. Design reviews of concepts with respect to requirements verification serves as the design task of this investigation. The data from this user study are analysed, using descriptive and non-parametric statistics. The results reveal that designers are more confident and correct in making conclusions about whether a design meets requirements when using high-fidelity representations and physical representations, specifically high-fidelity prototypes. Low-fidelity representations appear to be useful for determining if a design meets functional requirements, but not geometric or manufacturing requirements. The relationship between drawing packages and low-fidelity prototypes is still unclear and thus is an area for further research. [ABSTRACT FROM AUTHOR]