Concurrent Robust Product and Process Design

1999 ◽  
Author(s):  
Lars Lindkvist ◽  
Rikard Söderberg
Keyword(s):  
Process Design ◽  
Evaluation Criteria ◽  
Software Tool ◽  
The Body ◽  
Assembly Process ◽  
Critical Dimensions ◽  
Cad System ◽  
Start Up ◽  
Assembly Evaluation ◽  
Product And Process

Abstract This paper presents a method for assembly evaluation. The method uses two evaluation criteria, robustness and variation analysis, and is supported by a software tool developed by the authors. The robustness evaluation aims at detecting design and assembly solutions that are sensitive to variation and may cause problems during production. Using this method in early product and process design phases helps to find more robust concepts, resulting in shorter production start-up time and better precision. The method’s use is exemplified in a concept study of the assembly process of the door to the body of a (fictitious) jeep. The study shows that the proposed method can be used to obtain an objective comparison between different concepts. This comparison includes both general robustness and the expected variation in the critical dimensions. The results can be used, together with economical and practical aspects, to determine which concept is best suited for the assembly process. The software used is implemented in the MS Windows environment and has an JGES interface that enables the user to import CAD geometry from an arbitrary CAD system. It can perform different types of robustness evaluations as well as traditional variation analyses.

System of System Based Sociotechnical Complexity Challenges in Product and Process Design

2011 ◽  
Author(s):  
Zulfiqar Ali-Qureshi
Keyword(s):  
Product Design ◽  
Process Design ◽  
Product Life Cycle ◽  
Process Development ◽  
Physical Structure ◽  
System Level ◽  
Design System ◽  
Assembly Process ◽  
Product And Process ◽  
Physical Elements

Unique characteristic of system of system based product life cycle challenges evolves different level of systems. This means the product design system and process level system consideration are very important besides the system level issues for product and process development which are part of systems of system. These core issues include the physical elements, assembly process and its related cognitive elements of component to that particular assembly and its process at Sub system level which are fundamental of System of system in holistic perspective of new product and process design. Any system level change or variety affects the next adjacent system in the same product as a member of same family of a system of system. In this paper the aspect of Hybrid electric car battery has been explored to reduce the system of system level sociotecnical complexity in product design. In this context, the affect of changeability in the assembly system level has been explored and DFA analysis and the complexity Index of the product at physical structure, assembly process and cognitive system level been discussed to draw analogy for making an understanding of similar nature of the system in platform based product and process family development.

Making Up 3D Bodies

2021 ◽  
Vol 4 (2) ◽  
pp. 1-9
Author(s):  
Kiona Hagen Niehaus ◽  
Rebecca Fiebrink
Keyword(s):  
Software Tool ◽  
The Body ◽  
Design Parameters ◽  
Artistic Practice ◽  
Human Form ◽  
Modeling Systems ◽  
Exploratory Approach ◽  
Disability Status ◽  
High Level ◽  
The Impact

This paper describes the process of developing a software tool for digital artistic exploration of 3D human figures. Previously available software for modeling mesh-based 3D human figures restricts user output based on normative assumptions about the form that a body might take, particularly in terms of gender, race, and disability status, which are reinforced by ubiquitous use of range-limited sliders mapped to singular high-level design parameters. CreatorCustom, the software prototype created during this research, is designed to foreground an exploratory approach to modeling 3D human bodies, treating the digital body as a sculptural landscape rather than a presupposed form for rote technical representation. Building on prior research into serendipity in Human-Computer Interaction and 3D modeling systems for users at various levels of proficiency, among other areas, this research comprises two qualitative studies and investigation of the impact on the first author's artistic practice. Study 1 uses interviews and practice sessions to explore the practices of six queer artists working with the body and the language, materials, and actions they use in their practice; these then informed the design of the software tool. Study 2 investigates the usability, creativity support, and bodily implications of the software when used by thirteen artists in a workshop. These studies reveal the importance of exploration and unexpectedness in artistic practice, and a desire for experimental digital approaches to the human form.

EASE--An Application-Based CAD System for Process Design

1987 ◽  
Vol 6 (6) ◽  
pp. 1032-1038 ◽  
Author(s):  
J. Mar ◽  
K. Bhargavan ◽  
S.G. Duvall ◽  
R. Firestone ◽  
D.J. Lucey ◽  
...  
Keyword(s):  
Process Design ◽  
Cad System

Automated Navigation of Method Time Measurement Tables for Automotive Assembly Line Planning

2013 ◽  
Author(s):  
Rahul Renu ◽  
Matthew Peterson ◽  
Gregory Mocko ◽  
Joshua Summers
Keyword(s):  
Software Tool ◽  
Controlled Vocabulary ◽  
Prototype System ◽  
Assembly Process ◽  
Line Planning ◽  
Assembly Time ◽  
Study Results ◽  
Automotive Assembly ◽  
Cad Models ◽  
Assembly Procedure

Assembly process sheets are formal documents used extensively within automotive original equipment manufacturers (OEMs) to document and communicate assembly procedure, required tooling, contingency plans, and time study results. These sheets are authored throughout the vehicle life-cycle. Further, various customers use these sheets for training, analyzing the process, and line-balancing. In this research, the primary focus is the time studies analysis that is completed using knowledge contained within the assembly process sheets. In this research, a method and software tool are developed to utilize coupling between part descriptions and process descriptions for assembly time studies. The method is realized through the development of a standardized vocabulary for describing work instructions, a mapping from work instructions to MTM codes, and a tool for extracting relevant part information from CAD models. The approach enables process planners to establish part-process coupling, author work instructions using the controlled vocabulary, to estimate assembly time. A prototype system is developed and tested using examples from an automotive OEM.

scholarly journals Graduate Students’ Behavioral Intention towards Social Entrepreneurship: Role of Social Vision, Innovativeness, Social Proactiveness, and Risk Taking

2021 ◽  
Vol 13 (11) ◽  
pp. 6386
Author(s):  
Bingyan Tu ◽  
Roni Bhowmik ◽  
Md. Kamrul Hasan ◽  
Ahmed Al Asheq ◽  
Md. Atikur Rahaman ◽  
...  
Keyword(s):  
Graduate Students ◽  
Risk Taking ◽  
Social Entrepreneurship ◽  
Entrepreneurial Orientation ◽  
Entrepreneurial Intention ◽  
The Body ◽  
Survey Method ◽  
Social Vision ◽  
Body Of Knowledge ◽  
Start Up

In prior studies, several researchers have adopted entrepreneurial orientation (EO) in determining students’ intention toward entrepreneurship, although the application of EO is scant in determining intention toward social entrepreneurship in existing literature. Hence, in consideration of this research gap, the current study empirically examines the influence of the dimensions of social entrepreneurial orientation (SEO): social vision, social proactiveness, innovativeness, and risk-taking motive on graduate students’ entrepreneurial intention toward social entrepreneurship-based business start-up. An online-based survey method was used to collect data from a sample of 465 students purposively who were studying at different universities in Bangladesh. A PLS-based SEM was applied to analyze the data and examined the proposed relationships in the conceptual model. The findings reveal that Graduate students’ social proactiveness, innovativeness, and risk-taking motive significantly affect their social entrepreneurial intention. However, students’ social vision does not have direct influence but has indirect influence on social entrepreneurial intention through their social entrepreneurial attitudes. The research contributes to the body of knowledge in the existing social entrepreneurship literature as well as provides practical implications for the policymakers, practitioners, and stakeholders working toward flourishing of social-based entrepreneurship, venture, and start-up.

Design for Assembly Evaluation of Orientation Difficulty Features

1992 ◽  
Author(s):  
Robert H. Sturges ◽  
Jui-Te Yang
Keyword(s):  
Geometric Modeling ◽  
Boundary Representation ◽  
Design For Assembly ◽  
Assembly Process ◽  
Assembly Evaluation ◽  
Index Of Difficulty ◽  
Analysis System ◽  
Time Required ◽  
High Level ◽  
Geometric Modeling System

Abstract In support of the effort to bring downstream issues to the attention of the designer as parts take shape, an analysis system is being built to extract certain features relevant to the assembly process, such as the dimension, shape, and symmetry of an object. These features can be applied to a model during the downstream process to evaluate handling and assemblability. In this paper, we will focus on the acquisition phase of the assembly process and employ a Design for Assembly (DFA) evaluation to quantify factors in this process. The capabilities of a non-homogeneous, non-manifold boundary representation geometric modeling system are used with an Index of Difficulty (ID) that represents the dexterity and time required to assemble a product. A series of algorithms based on the high-level abstractions of loop and link are developed to extract features that are difficult to orient, which is one of the DFA criteria. Examples for testing the robustness of the algorithms are given. Problems related to nearly symmetric outlines are also discussed.

Integrating Product Design With Manufacturing Process Design Using the Robust Concept Exploration Method

1996 ◽  
Author(s):  
Jesse D. Peplinski ◽  
Janet K. Allen ◽  
Farrokh Mistree
Keyword(s):  
Product Design ◽  
Process Design ◽  
Manufacturing Process ◽  
Response Surfaces ◽  
Production Costs ◽  
Early Stages ◽  
Trade Offs ◽  
Development Costs ◽  
Concept Exploration ◽  
Product And Process

Abstract How can the manufacturability of different product design alternatives be evaluated efficiently during the early stages of concept exploration? The benefits of such integrated product and manufacturing process design are widely recognized and include faster time to market, reduced development costs and production costs, and increased product quality. To reap these benefits fully, however, one must examine product/process trade-offs and cost/schedule/performance trade-offs in the early stages of design. Evaluating production cost and lead time requires detailed simulation or other analysis packages which 1) would be computationally expensive to run for every alternative, and 2) require detailed information that may or may not be available in these early design stages. Our approach is to generate response surfaces that serve as approximations to the analyses packages and use these approximations to identify robust regions of the design space for further exploration. In this paper we present a method for robust product and process exploration and illustrate this method using a simplified example of a machining center processing a single component. We close by discussing the implications of this work for manufacturing outsourcing, designing robust supplier chains, and ultimately designing the manufacturing enterprise itself.

scholarly journals A Novel Optical Bioimaging Method for Direct Assessment of Ovarian Cancer Chemotherapy Response at Laparoscopy

2016 ◽  
Vol 15 ◽  
pp. CIN.S40660 ◽  
Author(s):  
Alexandros Laios ◽  
Davide Volpi ◽  
Rajeev Kumar ◽  
Zoe Traill ◽  
Borivoj Vojnovic ◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Unit Length ◽  
Evaluation Criteria ◽  
Advanced Ovarian Cancer ◽  
Software Tool ◽  
Lesion Size ◽  
Chemotherapy Response ◽  
Direct Assessment ◽  
Before And After ◽  
Image Pixels

In patients with advanced ovarian cancer (AOC), additional imaging of disseminated disease at laparoscopy could complement conventional imaging for estimation of chemotherapy response. We developed an image segmentation method and evaluated its use in making accurate and objective measurements of peritoneal metastases in comparison to Response Evaluation Criteria In Solid Tumors (RECIST) criteria. A software tool using a custom ImageJ macro-based approach was employed to estimate lesion size by converting image pixels into unit length. The software tool was tested as a proof-of-principle in an AOC patient with two isolated peritoneal deposits. Image analysis of representative laparoscopic snapshots before and after three cycles of neoadjuvant chemotherapy (NACT) revealed an average tumor nodule response ratio (TNRR) of 40% (partial response), which was in concordance with RECIST evaluation by computed tomography (CT). We demonstrated the feasibility of using this novel anatomical analysis for direct assessment of chemotherapy response in an AOC patient as an adjunct to RECIST criteria.

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