scholarly journals Design Requirements Review and Time-dependant CP Performance Analysis for Corrosion Protection Design Optimization of Offshore Structure

2016 ◽  
Vol 49 (5) ◽  
pp. 408-415
Author(s):  
Jae-Cheul Park ◽  
Yoo-Youl Choi ◽  
Kang-Il Pyeon ◽  
Kang-Woo Chun ◽  
Hwa-Sup Jang ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Design Optimization ◽  
Corrosion Protection ◽  
Offshore Structure ◽  
Design Requirements

Design-airworthiness integration method for general aviation aircraft during early development stage

2019 ◽  
Vol 91 (7) ◽  
pp. 1067-1076
Author(s):  
Maxim Tyan ◽  
Jungwon Yoon ◽  
Nhu Van Nguyen ◽  
Jae-Woo Lee ◽  
Sangho Kim
Keyword(s):  
Design Optimization ◽  
Design Stage ◽  
Design Parameters ◽  
Design Framework ◽  
Efficient Design ◽  
Content Type ◽  
Early Design ◽  
Early Design Stage ◽  
Optimization Framework ◽  
Design Requirements

Purpose Major changes of an aircraft configuration are conducted during the early design stage. It is important to include the airworthiness regulations at this stage while there is extensive freedom for designing. The purpose of this paper is to introduce an efficient design framework that integrates airworthiness guidelines and documentation at the early design stage. Design/methodology/approach A new design and optimization process is proposed that logically includes the airworthiness regulations as design parameters and constraints by constructing a certification database. The design framework comprises requirements analysis, preliminary sizing, conceptual design synthesis and loads analysis. A design certification relation table (DCRT) describes the legal regulations in terms of parameters and values suitable for use in design optimization. Findings The developed framework has been validated and demonstrated for the design of a Federal Aviation Regulations (FAR) 23 four-seater small aircraft. The validation results show an acceptable level of accuracy to be applied during the early design stage. The total mass minimization problem has been successfully solved while satisfying all the design requirements and certification constraints specified in the DCRT. Moreover, successful compliance with FAR 23 subpart C is demonstrated. The proposed method is a useful tool for design optimization and compliance verifications during the early stages of aircraft development. Practical implications The new certification database proposed in this research makes it simpler for engineers to access a large amount of legal documentation related to airworthiness regulations and provides a link between the regulation text and actual design parameters and their bounds. Originality/value The proposed design optimization framework integrates the certification database that is built of several types of legal documents such as regulations, advisory circulars and standards. The Engineering Requirements and Guide summarizes all the documents and design requirements into a single document. The DCRT is created as a summary table that indicates the design parameters affected by a given regulation(s), the design stage at which the parameter can be evaluated and its value bounds. The introduction of the certification database into the design optimization framework significantly reduces the engineer’s load related for airworthiness regulations.

scholarly journals Penerapan Metode Waterfall Dan Webqual 4.0 Pada Pengembangan Website Dealer Asa Mandiri Motor

2019 ◽  
Vol 5 (2) ◽  
Author(s):  
Meldy Saimon Pinontoan ◽  
Antonius Rachmat ◽  
Rosa Delima
Keyword(s):  
Performance Analysis ◽  
General Public ◽  
Black Box ◽  
Quadrant Analysis ◽  
Quality Level ◽  
Assessment Tests ◽  
Strategic Location ◽  
Importance Analysis ◽  
Black Box Testing ◽  
Design Requirements

Abstract — Asa Mandiri Motor Dealer is one of the companies involved in the sale and purchase of used motorcycles. The problem that occurs at Asa Mandiri Motor Dealer is the decline in customer visits due to the lack of strategic location of the main dealer. The purpose of establishing a system for developing Asa Mandiri Motor dealer through the Waterfall method website is to measure the quality level using the webqual 4.0 method and the Importance Performance Analysis (IPA) to determine the assessment tests and improvements that are required to improve the service to users and customers through the website.In this study, the author also tested the waterfall method using black box testing to determine the level of functionality on the site, and using tests on the quality level of the site to make recommendations for improvements through quadrant analysis in the Webqual 4.0 method and the Importance Performance Analysis (IPA). This test was conducted on 50 respondents based on the type of respondent (client, non-client (general public), administrator). The results of the study show that the website can be accessed online, the level of website functionality that meets the design requirements, still has a gap value of -0.07, which means that the site is still not in accordance to the needs of users with relatively small scores and author has made improvements to the  indicators (INF1, INF2, INF3, USA4, USA5), but no further testing has been done.   Keywords— Waterfall, Webqual 4.0, Importance Analysis, Black Box Test

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