scholarly journals Evaluating a Set-Based Design Tradespace Exploration Process

2019 ◽  
Vol 153 ◽  
pp. 185-192
Author(s):  
Eric Specking ◽  
Gregory Parnell ◽  
Edward Pohl ◽  
Randy Buchanan
Keyword(s):  
Exploration Process ◽  
Set Based Design ◽  
Tradespace Exploration

scholarly journals Quantitative Set-Based Design to Inform Design Teams

2021 ◽  
Vol 11 (3) ◽  
pp. 1239
Author(s):  
Eric Specking ◽  
Nicholas Shallcross ◽  
Gregory S. Parnell ◽  
Edward Pohl
Keyword(s):  
System Design ◽  
Design Decision ◽  
Design Decisions ◽  
Exploration Process ◽  
Design Alternatives ◽  
Engineering Technique ◽  
Potential Benefits ◽  
Aerial Vehicle ◽  
Set Based Design ◽  
Tradespace Exploration

System designers, analysts, and engineers use various techniques to develop complex systems. A traditional design approach, point-based design (PBD), uses system decomposition and modeling, simulation, optimization, and analysis to find and compare discrete design alternatives. Set-based design (SBD) is a concurrent engineering technique that compares a large number of design alternatives grouped into sets. The existing SBD literature discusses the qualitative team-based characteristics of SBD, but lacks insights into how to quantitatively perform SBD in a team environment. This paper proposes a qualitative SBD conceptual framework for system design, proposes a team-based, quantitative SBD approach for early system design and analysis, and uses an unmanned aerial vehicle case study with an integrated model-based engineering framework to demonstrate the potential benefits of SBD. We found that quantitative SBD tradespace exploration can identify potential designs, assess design feasibility, inform system requirement analysis, and evaluate feasible designs. Additionally, SBD helps designers and analysts assess design decisions by providing an understanding of how each design decision affects the feasible design space. We conclude that SBD provides a more holistic tradespace exploration process since it provides an integrated examination of system requirements and design decisions.

Demonstrating set-based design techniques: an unmanned aerial vehicle case study

2019 ◽  
Vol 17 (4) ◽  
pp. 339-355 ◽  
Author(s):  
Colin Small ◽  
Gregory S Parnell ◽  
Ed Pohl ◽  
Simon R Goerger ◽  
Matthew Cilli ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Future Research ◽  
Trade Off ◽  
Design Concepts ◽  
Systems Research ◽  
Aerial Vehicle ◽  
Engineering Changes ◽  
Set Based Design ◽  
Tradespace Exploration

The Engineered Resilient Systems research program seeks to improve decision making in the Analysis of Alternatives process by leveraging model-based engineering (MBE) early in the design process to develop more resilient systems. Traditional tradespace exploration using point-based design often converges quickly to an initial baseline design concept with subsequent engineering changes to modify the design. However, this process can lead to significant cost growth if the initial concept is not able to meet requirements or if the revised design is not affordable. Enabled by MBE, set-based design (SBD) considers sets of all possible design concepts and down-selects design concepts to converge to a final design using insights into design trade-off analysis, modeling and simulation, and test data. Using a notional unmanned aerial vehicle case study with low-fidelity physics-based models and an open source Excel® add-in called SIPmath©, this research implements an integrated MBE trade-off analytics framework that simultaneously generates numerous SBDs using parametric performance and cost models and evaluates the designs in the value and cost tradespace. In addition, this research explores incorporating resilience quantification and uncertainty into SBD trade-off analysis. Future research is needed to validate the use of SBD with low-fidelity models for tradespace exploration in early system design.

Using value of information in quantitative set‐based design

2021 ◽  
Author(s):  
Nicholas J. Shallcross ◽  
Gregory S. Parnell ◽  
Ed Pohl ◽  
Simon R. Goerger
Keyword(s):  
Value Of Information ◽  
Set Based Design

scholarly journals Creating products in the absence of markets: a robust design approach

2008 ◽  
Vol 19 (3) ◽  
pp. 407-420 ◽  
Author(s):  
Philippe Silberzahn ◽  
Christophe Midler
Keyword(s):  
Longitudinal Study ◽  
Product Design ◽  
Robust Design ◽  
Practical Implication ◽  
Collaborative Work ◽  
High Tech ◽  
Content Type ◽  
Exploration Process ◽  
Strategic Process ◽  
Alternative Approach

PurposeThe purpose of this study is to examine how firms deal with a situation of true uncertainty about their potential markets and technologies. Specifically, it asks how firms can create products when the corresponding market does not exist.Design/methodology/approachThis paper is based on a longitudinal study of a high‐tech firm, combined with analysis of existing theory in product design and entrepreneurship.FindingsMarkets and products are usually a defining choice made early on by firms in their strategic process. Such a choice guides their development by providing a “stable concept” to which decisions can be related. When markets do not exist yet, however, this approach is not effective. Early choice of products and markets limits firms' flexibility by constraining their ability and willingness to adapt, while fundamental new technical and market information is likely to emerge during the project that will prove the initial assumptions wrong. The paper shows an alternative approach where products and markets actually result from a generic process of products and markets exploration driven by the firm. It is suggested that this approach forms a robust design in that it allows the firm to deal with the uncertainty by simultaneously developing its products and exploring markets, while preserving the flexibility to adapt to the changing environment.Practical implicationsThe practical implication of this paper is to suggest an alternative approach to deliberate planning in high‐tech ventures. With this approach, rather than markets and products, strategy defines a market and technology exploration process.Originality/valueThe paper is original in three ways. It links the product design and market exploration processes in high‐tech firm development; it is based on an in‐depth longitudinal study; and it results from an academic‐practitioner collaborative work.

The Calculation Method and Experimental Research on Throttling Pressure Drop during Kill a Well

2012 ◽  
Vol 229-231 ◽  
pp. 495-498
Author(s):  
Hui Xin Liu ◽  
Xian Min Yang ◽  
Cheng Tao Li ◽  
Xiang Cheng
Keyword(s):  
Pressure Drop ◽  
Calculation Method ◽  
Engineering Practice ◽  
Exploration Process ◽  
Throttle Valve ◽  
Long Time ◽  
Valve Opening ◽  
Casing Pressure ◽  
The Relationship ◽  
Control Accuracy

There is a common problem during kill a well, which is how to quickly and accurately control the surface casing pressure according to the requirements for killing a well. A step-by-step exploration process is employed on operation sites. Continuously adjusting throttle valve to acquire surface casing pressure may lead to failure of kill operation because of its long time and low control accuracy. Obviously, if the calculation problems of throttling drawdown can be resolved,the relationship between drawdown and throttle valve opening can be found and the course of explorating can be converted into a straight course.Then the success rate of killing well can be improved. More importantly, this can make automatic controll of surface casing pressure possible. The paper built the calculation method of throttling pressure drop by theoretical analysis and verified the calculation method by adopting it into field test. The result has showed that the calculation method of throttling pressure drop coincides with experimental results and it can be used in engineering practice.

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