An Apriori-Based Knowledge Mining Method for Product Configuration Design

2010 ◽  
Vol 139-141 ◽  
pp. 1490-1493 ◽  
Author(s):  
Li Yu ◽  
Yun Chen
Keyword(s):  
Product Configuration ◽  
Design Parameters ◽  
Configuration Design ◽  
Mining Method ◽  
Design Engineers ◽  
Promising Tool ◽  
Knowledge Intensive ◽  
The Cost

Product configuration design is a knowledge intensive process during product development. It is a critical step as the cost and quality of a product is based on decisions made at this stage. In the iterative process of product configuration design, customers and design engineers use different terms describing products which often results in misunderstanding. Based on the historical transaction records of customer requirements and design parameters, this paper proposes an Apriori-based data mining method to transform the implicit knowledge into explicit association rules. Three criterions, support, confidence and interestingness, are applied for the evaluation of the extracted rules. The effectiveness of the proposed method is illustrated with a case study of electrical bicycles. The results show that that the proposed method can be a promising tool for product configuration design.

scholarly journals Radio Planning Considerations in TETRA to LTE Migration for PPDR Systems: A Radioelectric Coverage Case Study

2019 ◽  
Vol 9 (2) ◽  
pp. 250 ◽  
Author(s):  
Diego del Rey Carrión ◽  
Leandro Juan-Llácer ◽  
José-Víctor Rodríguez
Keyword(s):  
Radio Communications ◽  
The Real ◽  
Lte Network ◽  
Real Scenario ◽  
The Cost ◽  
Areas Of Interest ◽  
Radio Planning

Transitioning a Terrestrial Trunked Radio (TETRA) network to a Long-Term Evolution (LTE) network in public protection and disaster relief (PPDR) systems is a path to providing future services requiring high radio interface throughput and allowing broadband PPDR (BB-PPDR) radio communications. Users of TETRA networks are currently considering how to deploy a BB-PPDR network in the coming years. This study offers several radio planning considerations in TETRA to LTE migration for such networks. The conclusions are obtained from a case study in which both measurements and radioelectric coverage simulations were carried out for the real scenario of the Murcia Region, Spain, for both TETRA and LTE systems. The proposed considerations can help PPDR agencies efficiently estimate the cost of converting a TETRA network to an LTE network. Uniquely in this study, the total area is divided into geographical areas of interest that are defined as administrative divisions (region, municipal areas, etc.). The analysis was carried out using a radio planning tool based on a geographic information system and the measurements have been used to tune the propagation models. According to the real scenario considered, the number of sites needed in the LTE network—for a specific quality of service (90% for the whole region and 85% for municipal areas)—is a factor of 2.4 higher than for TETRA network.

Forecasting Manufacturing Quality and Optimizing Product Robustness Using Process Capability Data

Manufacturing ◽  
2003 ◽  
Author(s):  
Daniel Kern ◽  
Xiaoping Du ◽  
Agus Sudjianto
Keyword(s):  
Probabilistic Approach ◽  
Process Capability ◽  
Simulation Models ◽  
Design Parameters ◽  
Set Design ◽  
Manufacturing Quality ◽  
Design Engineers ◽  
Parameter Values ◽  
Manufacturing Variation

A company’s success is highly dependent on its ability to manufacture quality products. Designing products that can be manufactured to meet customer needs with an acceptable level of variation is challenging because design engineers are often unfamiliar with the company’s manufacturing capability or are unable to effectively use the capability data to improve a design. The authors present an approach to forecast the manufacturing quality of a product and optimize its robustness while it is being designed. The system comprises a database that stores process capability data and simulation models to simulate process capability data when actual, appropriate data are nonexistent. These data and tools are used with a new probabilistic approach through the inverse reliability strategy to optimize the robustness of a design by locating values of design parameters that enhance the performance of the design and are insensitive to manufacturing variation. Design engineers can use this approach to set design parameter values that will improve the functionality of the product while ensuring it can be produced with high capability. This approach is demonstrated with a design example of an engine valvetrain.

scholarly journals Never let me go? A case study of deaccessioning and disposal undertaken at Museum of Wellington City and Sea

2021 ◽  
Author(s):  
◽  
Rebecca Loud
Keyword(s):  
Rational Approach ◽  
Unique Challenge ◽  
Economic Climate ◽  
Systematic Planning ◽  
Strategic Relationships ◽  
The Cost ◽  
Museum Practice

<p>In the current economic climate museums are increasingly being asked to do more with less. For museums that hold collections, this poses a unique challenge. With the cost of collections being relentlessly accumulative, questions are being raised about the long term financial sustainability of current collecting practices. Deaccessioning is being suggested as a way in which museums can improve the quality of their collection without increasing its size. Yet the literature on deaccessioning suggests that the process is fraught with ethical and practical difficulties. By highlighting the negatives aspects of the process, writing in museum studies and practice does little to explore how deaccessioning might be used to achieve positive outcomes. This research addresses this gap by asking whether deaccessioning is a positive tool that, if used appropriately, can assist a museum in improving the quality and manageability of their collection through systematic planning. To understand how and why a museum may permanently remove objects from their collection, the study focuses on one New Zealand museum’s response to the challenge of redeveloping a collection through the process of deaccessioning and disposal. The Museum of Wellington City and Sea’s deaccessioning process is analysed through documentary research and interviews with Museum staff. The interviews offer an understanding of the thought processes and motivations involved in selecting objects to be deaccessioned. The data collected reveals both the challenging aspects of the process but also offers insights into how these aspects can be mitigated or resolved. The conclusions presented in this dissertation suggest that deaccessioning is an integral part of current museum practice that can be used positively to actively shape and refine a museum collection. I argue that some of the beneficial outcomes of the process include greater understanding of collections, improved knowledge and context, resolution of historical collecting problems, strategic relationships built with other museums and improvement in how objects are stored and utilised. More importantly deaccessioning allows museums to determine the character and content of their collections. In order for this to be achieved, I recommend that museums adopt a rational approach to reviewing their collections that is multi-disciplinary, transparent and acknowledges how their collection is used in the achievement of their institution’s mission.</p>

scholarly journals Cost–benefit analysis of a staff recreation centre project: build or lease? – A Case Study

2013 ◽  
Vol 4 (1) ◽  
pp. 41
Author(s):  
Monica Singhania
Keyword(s):  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
New Delhi ◽  
Employee Morale ◽  
Benefit Analysis ◽  
The Cost ◽  
Community Centre

This case study aims at comprehensively assessing a decision by XYZ Ltd (name withheld due to confidentiality), New Delhi, on whether to build or to lease a recreation centre for its rank-and-file employees. Based on a cost–benefit analysis, we concluded that the centre should be built since the company would recover its investment within 11 years. Apart from the financial considerations, the recreation centre could be considered a long-term investment in employee morale, as it would lead to a better quality of life for the staff and their families, and is likely to enhance their sense of belonging and improve productivity. To date, what little space there is available for hosting family functions is reserved for the use of the officers, and only officers and their families are invited to most company functions. Thus, the other employees feel neglected by the management. Hiring a community centre external to the organisation for a function would involve spending a lot of money as the company is located in a prime real estate area where the cost of land and rentals is huge, and sometimes even availability is an issue. Most of the staff cannot afford such places and are generally under a lot of stress whenever they have a family function. This, in turn, tends to affect their productivity. 

scholarly journals An exploration of the role of advanced clinical practitioners in the East of England

2020 ◽  
Vol 29 (15) ◽  
pp. 864-869
Author(s):  
Claire Hooks ◽  
Susan Walker
Keyword(s):  
Clinical Decision Making ◽  
Clinical Decision ◽  
Self Awareness ◽  
The Uk ◽  
The Cost ◽  
High Degree ◽  
Individual Accountability

Medical staff shortages in the UK have provided impetus for the introduction of advanced clinical practitioners (ACPs). This case study explored the views of 22 ACPs, managers and doctors in primary and acute settings in a region of England, to understand how the role is used, and barriers and facilitators to its success. ACP roles improved the quality of service provision, provided clinical career development and enhanced job satisfaction for staff and required autonomous clinical decision-making, with a high degree of self-awareness and individual accountability. Barriers included disparate pay-scales and funding, difficulty accessing continuing education and research, and lack of agreed role definition and title, due to a lack of standardised regulation and governance, and organisational barriers, including limited access to referral systems. Facilitators were supportive colleagues and opportunities for peer networking. Regulation of ACP roles is urgently needed, along with evaluation of the cost-effectiveness and patient experience of such roles.

scholarly journals The influence of changes in the project on the reliability of heat power systems during construction and installation works

2019 ◽  
Vol 124 ◽  
pp. 05083
Author(s):  
T.G. Gorbunova ◽  
T.O. Politova ◽  
Sh.G. Ziganshin ◽  
E.V. Izmailova ◽  
V.V. Serov
Keyword(s):  
Power Systems ◽  
Heat Supply ◽  
Heat Supply System ◽  
Supply System ◽  
Negative Consequences ◽  
Regulatory Requirements ◽  
Heat Networks ◽  
Design Engineers ◽  
The Cost

However, during the construction and reconstruction of existing heat networks, cases that lead to unstable operation of newly laid or replaced areas arise. An important task is to minimize the reasons that can cause damage to replaced areas. Factors that negatively affect the reliability include: laying pipelines without design documentation, non-compliance of the regulatory requirements for their laying by installation organizations. The assumptions of design engineers developing the project and installers laying the heating main can lead to negative consequences, including a decrease in the reliability of the facilities functioning. Physical deterioration, coupled with the above factors, leads to a large number of failures of heat networks. Breakthroughs reduce the reliability of the entire heat supply system, worsen the quality of the supplied coolant and lead to an increase in the cost of maintenance of heat networks by operating organizations. The paper considers the influence of changes in the project during the construction and installation works on the reliability of the heat supply system.

scholarly journals Contact Profile Analysis of Resource Estimation Domains: A Case Study on a Laterite Nickel Deposit

2021 ◽  
Vol 5 (1) ◽  
pp. 89
Author(s):  
Ioannis Kapageridis ◽  
Athanasios Apostolikas ◽  
Georgios Kamaris
Keyword(s):  
Profile Analysis ◽  
Estimation Method ◽  
Mining Method ◽  
Resource Estimation ◽  
Nickel Deposit ◽  
Boundary Contact ◽  
And Control ◽  
The Relationship

Resource estimation is commonly performed in separate domains that are defined using different criteria depending on the type and geometry of the deposit, the mining method used, and the estimation method applied. The validity of estimation domains can be critical to the quality of produced resource estimates as they control various steps of the estimation process, including sample and block selection. Estimation domains also affect statistical and geostatistical analyses because they define what estimation practitioners will consider as statistically separate distributions of data. Sometimes, samples from different estimation domains share similar grade properties close to the contact between domains, a situation known as a soft boundary. In such cases, it can be useful to include samples from different domains at short distances from the boundary. Contact profile analysis is a technique that allows for the measurement of the relationship between grades on either side of the contact between two estimation domains. As discussed in the study presented in this paper, contact profile analysis can help validate the defined estimation domains and control the application depth of any soft boundaries found between domains.

scholarly journals Zwinne szacowanie pracochłonności w projektach programistycznych – studium przypadków

2017 ◽  
Vol 1 (3) ◽  
Author(s):  
Maciej Łabędzki ◽  
Patryk Promiński ◽  
Adam Rybicki ◽  
Marcin Wolski
Keyword(s):  
Software Development ◽  
Labor Intensity ◽  
Software Projects ◽  
Current Trends ◽  
The Difference ◽  
Correct Estimation ◽  
The Cost ◽  
Made In

Aim:Aim: The purpose of this paper is to identify common mistakes and pitfalls as well as best practices in estimating labor intensity in software projects. The quality of estimations in less experienced teams is often unsatisfactory, as a result of which estimation as part of the software development process is abandoned. The decision is usually justified by misunderstanding "agility". This article is part of the discussion on current trends in estimation, especially in the context of the new "no estimates" approach.Design / Research methods: The publication is a case study based on the experience of a mature development team. The author, on the basis of literature-based estimation techniques, shows good and bad practices, as well as common mistakes in thinking and behavior.Conclusions / findings: The key to correct estimation is: understanding the difference between labor intensity and time, ability to monitor performance, as well as how to analyze staff requirements for the team.Originality / value of the article: The publication helps to master confidence-boosting techniques for any estimation (duration, and indirectly, the cost of software development) where requirements are known, but mainly at the stage of project implementation (design and implementation).Limitations of the research: The work does not address the problems of initial estimation of projects, i.e. the estimation made in the early stages of planning.

scholarly journals Never let me go? A case study of deaccessioning and disposal undertaken at Museum of Wellington City and Sea

2021 ◽  
Author(s):  
◽  
Rebecca Loud
Keyword(s):  
Rational Approach ◽  
Unique Challenge ◽  
Economic Climate ◽  
Systematic Planning ◽  
Strategic Relationships ◽  
The Cost ◽  
Museum Practice

<p>In the current economic climate museums are increasingly being asked to do more with less. For museums that hold collections, this poses a unique challenge. With the cost of collections being relentlessly accumulative, questions are being raised about the long term financial sustainability of current collecting practices. Deaccessioning is being suggested as a way in which museums can improve the quality of their collection without increasing its size. Yet the literature on deaccessioning suggests that the process is fraught with ethical and practical difficulties. By highlighting the negatives aspects of the process, writing in museum studies and practice does little to explore how deaccessioning might be used to achieve positive outcomes. This research addresses this gap by asking whether deaccessioning is a positive tool that, if used appropriately, can assist a museum in improving the quality and manageability of their collection through systematic planning. To understand how and why a museum may permanently remove objects from their collection, the study focuses on one New Zealand museum’s response to the challenge of redeveloping a collection through the process of deaccessioning and disposal. The Museum of Wellington City and Sea’s deaccessioning process is analysed through documentary research and interviews with Museum staff. The interviews offer an understanding of the thought processes and motivations involved in selecting objects to be deaccessioned. The data collected reveals both the challenging aspects of the process but also offers insights into how these aspects can be mitigated or resolved. The conclusions presented in this dissertation suggest that deaccessioning is an integral part of current museum practice that can be used positively to actively shape and refine a museum collection. I argue that some of the beneficial outcomes of the process include greater understanding of collections, improved knowledge and context, resolution of historical collecting problems, strategic relationships built with other museums and improvement in how objects are stored and utilised. More importantly deaccessioning allows museums to determine the character and content of their collections. In order for this to be achieved, I recommend that museums adopt a rational approach to reviewing their collections that is multi-disciplinary, transparent and acknowledges how their collection is used in the achievement of their institution’s mission.</p>

Reducing Enterprise Product Line Architecture Deployment and Testing Costs via Model Driven Deployment, Configuration, and Testing

2011 ◽  
pp. 334-350
Author(s):  
Jules White ◽  
Brian Dougherty
Keyword(s):  
Configuration Space ◽  
Cost Savings ◽  
Product Line ◽  
Distributed Constraint Optimization ◽  
Model Driven ◽  
Product Line Architecture ◽  
The Cost ◽  
Distributed Test

Product-line architectures (PLAs) are a paradigm for developing software families by customizing and composing reusable artifacts, rather than handcrafting software from scratch. Extensive testing is required to develop reliable PLAs, which may have scores of valid variants that can be constructed from the architecture’s components. It is crucial that each variant be tested thoroughly to assure the quality of these applications on multiple platforms and hardware configurations. It is tedious and error-prone, however, to setup numerous distributed test environments manually and ensure they are deployed and configured correctly. To simplify and automate this process, the authors present a model-driven architecture (MDA) technique that can be used to (1) model a PLA’s configuration space, (2) automatically derive configurations to test, and (3) automate the packaging, deployment, and testing of con-figurations. To validate this MDA process, the authors use a distributed constraint optimization system case study to quantify the cost savings of using an MDA approach for the deployment and testing of PLAs.

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