scholarly journals Designing Products with a Focus on Self-Explanatory Assembly, a Case Study

2019 ◽  
Vol 1 (1) ◽  
pp. 2081-2090 ◽  
Author(s):  
Davy Daniël Parmentier ◽  
Jan Detand ◽  
Jelle Saldien
Keyword(s):  
Design Engineering ◽  
Procedural Instructions

AbstractDesigning products with a focus on self-explanatory assembly can reduce the use of procedural instructions and the associated problems. This paper describes how different groups of students, in two different design-engineering courses designed or redesigned products in an attempt to make the assembly of the product self-explanatory. The design outcomes are discussed in relation to the design context and linked to existing theory on design for meaning.

On the dependability of highly critical non-recoverable space entities with short operation life. Case study of single-use mechanical devices

Dependability ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 3-12
Author(s):  
Yu. P. Pokhabov
Keyword(s):  
Process Engineering ◽  
Small Scale ◽  
Design Engineering ◽  
Scale Production ◽  
Decimal Point ◽  
Engineering Analysis ◽  
Single Use ◽  
Mechanical Devices ◽  
Verification Techniques

Aim. To consider matters of dependability of highly critical non-recoverable space products with short operation life, whose failures are primarily caused by design and process engineering errors, manufacturing defects in the course of single-unit or small-scale production, as well as to define the methodological approach to ensuring the required reliability.Methods. Options were analysed for improving the dependability of entities with short operation life using the case study of single-use mechanical devices and the statistical approaches of the modern dependability theory, special methods of dependability of actuated mechanical assemblies, FMEA, Stage-Gate and ground experiments on single workout equivalents for each type of effect. Results. It was concluded that additional procedures need to be conducted for the purpose of predicting, mitigation and (or) eliminating possible failures as part of the design process using exactly the same approaches that cause failures, i.e., those of design and process engineering. The engineering approaches to dependability are based on early identification of possible causes of failures, which requires a qualified and systemic analysis aimed at identifying the functionality, performance and dependability of an entity, taking into account critical output parameters and probabilistic indicators that affect the performance of the required functions with the allowable probability of failure. The solution is found using a generalized parametric model of operation and design engineering analysis of dependability.Conclusion. For highly critical non-recoverable space entities with short operation life, the reliability requirements should be considered primarily in terms financial, economic, safetyrelated and reputational risks associated with the loss of spacecraft. From a design engineer’s standpoint, the number of nines after the decimal point (rounded to a smaller number of nines for increased confidence) should be seen as the indicator for the application of the appropriate approaches to ensuring the required reliability at the stage of product design. In case of two nines after the decimal point it is quite acceptable to use analytical and experimental verification techniques common to the aerospace industry, i.e., dependability calculations using the statistical methods of the modern dependability theory and performance indicators, FMEA and Stage-Gate, ground experiments on single workout equivalents for each type of effect. As the required number of nines grows, it is advisable to also use early failure prevention methods, one of which is the design engineering analysis of dependability that enables designers to adopt substantiated design solutions on the basis of engineering disciplines and design and process engineering methods of ensuring quality and dependability. The choice of either of the above dependability strategies is determined solely by the developer’s awareness and understanding of potential hazards, which allows managing the risk of potential rare failures or reasonably refusing to do so.

scholarly journals CASE STUDY IN SYSTEMATIC DESIGN ENGINEERING – BOW THRUSTER COVERS

2012 ◽  
Author(s):  
W Ernst Eder
Keyword(s):  
Engineering Design ◽  
Design Process ◽  
Design Science ◽  
Process Engineering ◽  
Design Engineering ◽  
Learning Design ◽  
Systematic Design ◽  
Methodical Approach ◽  
Novel Design

Students learning design engineering at times need a good example of procedure for novel design engineering. The systematic heuristic-strategic use of a theory to guide the design process – Engineering Design Science – and the methodical design process followed in this case study is only necessary in limited situations. The full procedure should be learned, such that the student can select appropriate parts for other applications. Creativity is usually characterized by a wide search for solutions, especially those that are innovative. The search can be helped by this systematic and methodical approach. This case example is presented to show application of the recommended method, and the expected scope of the output, with emphasis on the stages of conceptualizing. The case follows a novel design problem of a mechanism to open and close the bow thruster covers for the Caravan Stage Barge.

Risk Analysis of Engineering Change for Distributed Product Design

2020 ◽  
pp. 1-38
Author(s):  
Leilei Yin ◽  
Quan Sun ◽  
Youxiong Xu ◽  
Li Shao ◽  
Dunbing Tang
Keyword(s):  
Product Design ◽  
Change Propagation ◽  
Design Engineering ◽  
Limited Time ◽  
Primary Result ◽  
Engineering Change ◽  
Design Change ◽  
Working Groups ◽  
Simulation Results

Abstract Nowadays customer demand for satisfactory product developed in limited time is rapidly posing a major challenge to product design and more distributed products are developed to address these concerns. In the distributed product design, engineering change (EC) is an inevitable phenomenon and consumes much production time. It is necessary to assess the design change effectively in advance. Some methods and tools to predict and analyze the change propagation influence have been provided. From the perspective of design change duration, our work extends the method of assessing design change by incorporating risk factors from different working groups in multiple design sites, functional maintenance during the change propagation. The primary result of this work is the provision of a design support to acquire the optimal design change scheme by estimating the duration. In this paper, risk factor of distributed design is applied to the influence evaluation of change propagation, which implies an increase of change propagation influence due to the varying levels of expertise, possible lack of communication. Besides, a deterministic simulation model is proposed to assess the change propagation schemes. The model combines the effects of design change parallelism, iteration, change propagation for the distributed product design. Based on the simulation results, a more focused discussion and identification of suitable design change schemes can be made. A case study of an assembly tooling for the reinforced frame is implemented to demonstrated how the developed method can be applied. Finally, the method is initially discussed and evaluated.

scholarly journals Ducting Optimization – A Case Study

2012 ◽  
pp. 157-162
Author(s):  
C. Hemalatha ◽  
T. Radhakrishnan ◽  
K. Sankaranarayanasamy
Keyword(s):  
Flue Gas ◽  
Structural Design ◽  
Temperature Drop ◽  
Continuous Operation ◽  
Design Engineering ◽  
Complex Task ◽  
Duct System ◽  
Hot Air ◽  
Careful Design

Ducting system in a power plant is a conduit connecting one system to another through which either cold air or hot air or flue gas with ash is conveyed for continuous operation of the plant. To perform this function properly, careful design of ducting is required to take care of the stresses and forces exerted by various loadings and thermal expansion of the ducting and equipment it connects under given pressure and temperature. Ducting can be of any configuration viz. square, rectangular, circular, straight or bend, elbow or any other irregular shape. The design of large air and gas ducts is an extremely complex task which should meet both mechanical and structural design criteria. The purpose of ducts is to efficiently convey the air or flue gas from one location to another while maintaining the pressure drop and temperature drop as low as possible. This paper discusses about the optimization in the design engineering of the duct system.

scholarly journals CASE STUDY IN SYSTEMATIC DESIGN ENGINEERING – STAGE BARGE GANGWAY

2013 ◽  
Author(s):  
W. Ernst Eder
Keyword(s):  
Engineering Design ◽  
Design Process ◽  
Design Problem ◽  
Design Science ◽  
Process Engineering ◽  
Design Engineering ◽  
Learning Design ◽  
Systematic Design ◽  
Novel Design

Students learning design engineering at times need a good example of procedure for novel design engineering. The systematic heuristic-strategic use of a theory to guide the design process – Engineering Design Science – and the methodical design process followed in this case study is only necessary in limited situations. The full procedure should be learned, such that the studentcan select appropriate parts for other applications.This case example is presented to show application of the recommended method, and the expected scope of the output, with emphasis on the stages of conceptualizing. The case follows a novel design problem of a gangway for ship-shore transfer for the Caravan Stage Barge.

Case Study in Systematic Design Engineering: Smoke Gas Dust Precipitation

2009 ◽  
Author(s):  
W. Ernst Eder
Keyword(s):  
Design Process ◽  
Design Science ◽  
Precipitation Process ◽  
Design Engineering ◽  
Learning Design ◽  
Systematic Design ◽  
Methodical Approach ◽  
Novel Design ◽  
Dust Precipitation

Students learning design engineering at times need a good example of procedure for novel design engineering. The systematic heuristic-strategic use of a theory to guide the design process — Engineering Design Science — and methodical design process followed in this case study is only necessary in limited situations. The full procedure should be learned, such that the student can select appropriate parts for other applications. Creativity is usually characterized by a wide search for solutions, especially those that are innovative. The search can be helped by this systematic and methodical approach. This case example is presented to show application of the recommended method, and the expected scope of the output, with emphasis on the stages of conceptualizing. The case follows a novel design problem of a smoke gas dust precipitation process and the necessary technical system, including a sub-problem of a rapper for dust removal.

scholarly journals CASE STUDY IN SYSTEMATIC DESIGN ENGINEERING – WIND TUNNEL BALANCE MODEL SUPPORT

2012 ◽  
Author(s):  
W Ernst Eder
Keyword(s):  
Wind Tunnel ◽  
Design Process ◽  
Design Science ◽  
Balance Model ◽  
Design Engineering ◽  
Test Models ◽  
Methodical Approach ◽  
Wind Tunnel Balance ◽  
Novel Design

Students learning design engineering at times need a good example of procedure for novel design engineering. The systematic heuristic-strategic use of a theory to guide the design process – Engineering Design Science – and the methodical design process followed in this case study is only necessary in limited situations. The full procedure should be learned, such that the student can select appropriate parts for other applications. Creativity is usually characterized by a wide search for solutions, especially those that are innovative. The search can be helped by this systematic and methodical approach. This case example is presented to show application of the recommended method, and the expected scope of the output, with emphasis on the stages of conceptualizing. The case follows a novel design problem of an auxiliary attachment to render a wind tunnel balance more versatile to accommodate several different test models.

Lean Enabled Structural Information Modeling

2010 ◽  
pp. 619-637 ◽  
Author(s):  
Baris Lostuvali ◽  
Jay Love ◽  
Robert Hazleton
Keyword(s):  
San Francisco ◽  
Structural Information ◽  
Lean Production ◽  
Information Modeling ◽  
Project Delivery ◽  
Design Engineering ◽  
New Production ◽  
Quality Cost ◽  
Building Information

Lean production revolution started in manufacturing with origin in the Toyota Production System (TPS). Since Womack, Jones, and Roos (1990) announced this concept as a new production paradigm, various industries including the Architecture, Engineering and Construction (AEC) Industry have paid attention to its possible applications. While design, engineering and building practices in AEC are substantially different from manufacturing, the ideas drawn from Lean Production can be tailored for the AEC environment. The synthesis of lean production principles and techniques applied in AEC form the basis for a Lean Project Delivery System™ (LPDS). The principles of LPDS and Building Information Modeling (BIM) technologies offer new approaches and opportunities to improve the quality, cost, schedule and productivity of building products in a highly fragmented multi-disciplinary sector. The case study presented in this chapter provides an overview of the synergy between the principles and tools of LPDS with BIM technologies used at the California Pacific Medical Center’s (CPMC) Cathedral Hill Hospital (CHH) project in San Francisco, California.

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