• Title/Summary/Keyword: Systems Engineering(SE)

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Study of Configuration Management for City Train Standard Specifications using SE Tool (SE 툴을 이용한 도시철도 표준사양 형상관리 방안 연구)

  • Lee, Woo-Dong
    • Proceedings of the KIEE Conference
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    • 2006.07b
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    • pp.1095-1096
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    • 2006
  • Configuration management plays a key role in systems engineering process for any project from earlier stage of development. It consists of five major activities, ie., configuration management planing, configuration identification, configuration control, configuration status accounting and configuration verification and audit, and is essential to control system design development and operation throughout entire life cycle of the system development. And it is directly associated with other part of systems engineering management, ie., technical data management which provides traceability of important decisions and changes during development. In this paper, we describe how to apply CASE(Computer-aided Systems Engineering) tool-Cradle for the configuration management to achieve effectiveness of City Train Standard Specification Management process.

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A Study on the Thermal, Electrical Characteristics of Ge-Se-Te Chalcogenide Material for Use in Phase Change Memory

  • Nam, Ki-Hyun;Chung, Hong-Bay
    • Transactions on Electrical and Electronic Materials
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    • v.9 no.6
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    • pp.223-226
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    • 2008
  • $Ge_1Se_1Te_2$ chalcogenide amorphous materials was prepared by the conventional melt-quenching method. Samples were processed bye-beam evaporator systems and RF-sputtering systems. Phase change characteristics were analyzed by measuring glassification temperature, crystallization temperature and density of bulk material. The thermal characteristics were measured at the temperature between 300 K and 700 K, and the electrical characteristics were studied within the range from 0 V to 3 V. The obtained results agree with the electrothermal model for Phase-Change Random Access Memory.

SE Model-Based Program Development for Aircraft Full Life-Cycle Weight & Balance Control (SE기반의 전순기 항공기 중량.평형관리 Program 개발)

  • Kim, Jeong Hun;Park, Cha Hwan;Jeong, Yeong Hwa;Kim, Mun Giu;Kang, Min Sung
    • Journal of the Korean Society of Systems Engineering
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    • v.3 no.2
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    • pp.25-32
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    • 2007
  • There has been no systematic accumulation in the aircraft weight data even though those are crucial in the full life-cycle weight and balance program of aircraft. Companies, government agencies, and the Korea Air Force have been controling the data separately. The lack of communication between these institutes prevented the mutual use of the data. This study deals with a SE model-based weight and balance program development process for the full life-cycle weight and balance control of aircraft which enabled the efficient and mutual use of the weight data from the various institutes.

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SE, CM, EVM 통합을 통한 사업 관리 향상 방안

  • Seok, Yeon-Suk;Gang, Seong-Jin;Park, In-Gyeong;Gwon, Yong-Su
    • 한국경영정보학회:학술대회논문집
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    • 2007.06a
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    • pp.1023-1029
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    • 2007
  • 우리는 국가 경쟁력의 한 분야인 사업관리에 있어 계획, 수행, 성과관리, 개선에 최적의 프로세스 보유가 요구된다. 그러나 Project관리체계의 현 실태는 일정관리, 범위관리, 비용관리에 초점을 맞춘 일정관리체계, WBS(Work Breakdown Structure) 및 OBS(Organizational Breakdown Structure)관리, 비용관리체계의 부분 통합 혹은 서로의 연계 정도이다. 본 연구는 최적의 사업관리를 위하여 계약관리에 체계공학을 연계하여 계약 전에 WBS, IMP/IMS(Integrated Master Plan)/(Integratcd Master Schedule), TPM(Technical Performance Measurement) 등의 SEP(Systems Engineering Plan)와 계약 후의 이행을 검증 할 수 있는 과정의 Guideline을 제시하고, IEEE 1220, ANSI/EIA 632 순기 의거 개념설계부터 통합시험에 이르는 체계공학 순기에 따른 비용예측이 가능한 USC(University of Southern CalIfornia) 대학의 COSYSMO (Constructive Systems Engineering Cost ModeI)를 소개하고 적용 가능성을 고찰하며, Project의 전순기에 걸쳐 TPM 혹은 Quality를 비용과 일정에 통합하여 관리하는 PBEV(Performance Based Earned Value)모델을 소개하고 적용 가능성을 제시한다. Project 관리에 있어 System 차원을 강조한 SE(Systems Engineering), 비용예측의 CM(Cost Management), 성과관리를 위한 EVM(Earned Value Management)의 통합은 사업 관리에 역량을 강화하며 경쟁력을 향상 시킬 수 있는 적절한 접근으로 사료된다.

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Systems Engineering Application of Imaginary WIG(Wing-In-Ground Effect) Ship Acquisition Project (가상 함정획득사업의 Systems Engineering 적용 (INCOSE SE Handbook ver. 3.1 중심으로))

  • Lee, Su Oek;Shin, Seung Chun;Choi, Nag Jun
    • Journal of the Korean Society of Systems Engineering
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    • v.5 no.1
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    • pp.57-65
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    • 2009
  • The purpose of Defense Acquisition Project is that the superior weapons validated needs and performance are supplied to military user with limited financial resources and time. The Warship Acquisition Project is not only like this, But also has special characteristics of long project period and first-constructed ship's operation employment. So, The Warship Acquisition Project need systematic and efficient procedure & management. And this paper researches System engineering application of imaginary WIG(Wing-In-Ground Effect) ship acquisition project based Systems Engineering Handbook ver.3.1 published by INCOSE, the lead of field. The Imaginary WIG(Wing-In-Ground Effect) ship acquisition project applied the four processes(technical project, Enterprise & Agreement, Enabling Systems), the basis of INCOSE Engineering Handbook ver.3.1, and the each process output compared with DAPA(Defense Acquisition Program Administration)'s warship acquisition procedure.

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Silica-encapsulated ZnSe Quantum Dots as a Temperature Sensor Media (온도센서용 실리카에 담지된 ZnSe 양자점 소재)

  • Lee, Ae Ri;Park, Sang Joon
    • Applied Chemistry for Engineering
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    • v.26 no.3
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    • pp.362-365
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    • 2015
  • Silica encapsulated ZnSe quantum dots (QDs) were prepared by employing two microemulsion systems: AOT/water/cyclohexane microemulsions containing ZnSe quantum dots with NP5/water/cyclohexane microemulsions containing tetraethylorthosilicate (TEOS). Using this method, cubic zinc blende nanoparticles (3 nm in diameter) were synthesized and encapsulated by silica nanoparticles (20 nm in diameter). The temperature dependence of photoluminescence (PL) for silica-encapsulated ZnSe QDs was investigated to evaluate this material as a temperature sensor media. The fluorescence emission intensity of silica-encapsulated ZnSe nanoparticles (NPs) was decreased with an increase of ambient temperature over the range from $30^{\circ}C$ to $60^{\circ}C$ and a linear relationship between the temperature and the emission intensity was observed. In addition, the temperature dependence of PL intensity for silica-encapsulated ZnSe NPs showed a reversible pattern on ambient temperature. A reversible temperature dependence of the luminescence combined with its insensitivity toward quenching by oxygen due to silica coating established this material as an attractive media for temperature sensor applications.

Practical Requirements and Verification Management for Requirements-based Development Process in Space Launch Vehicle Development Project (요구조건 기준의 개발 수행을 위한 우주발사체 개발사업의 실제적인 요구조건-검증 관리 체계)

  • Dong Hyun Cho;Jun Hyouk Jang;Il Sang Yoo
    • Journal of the Korean Society of Systems Engineering
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    • v.19 no.1
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    • pp.56-63
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    • 2023
  • For the success of system development, it is necessary to systematically manage the requirements that are the basis of system development and its verification results. In order to follow the principles of SE(Systems Engineering)-based V&V(Verification&Validation) process, requirements can be managed by securing the requirements and their establishments, design compliances, and verification compliances according to the system development lifecycle. Especially, in a large-complex system research and development project, such as a space launch vehicle development project, many participants establish, verify, and validate numerous requirements together during the project. Therefore, logical and systematic requirements management, including guarantee of data integrity, change history, and traceability, is very important for multiple participants to utilize numerous requirements together without errors. This paper introduces the practical requirements and verification management for the requirements-based development process in the space launch vehicle development project.

A Study on the Design Methodology of SE-Based Military Force Construction in Defense Acquisition Process (Focusing on Influencing Factor Priorities) (국방획득 과정에서 SE개념 기반의 군사력건설 설계 방법론 연구(영향요인 우선순위 결정 중심으로))

  • Kim, Heung Bin;Seo, Je Hyeon
    • Journal of the Korean Society of Systems Engineering
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    • v.15 no.2
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    • pp.87-97
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    • 2019
  • This paper focuses on the SE concept based on the weapon system design, which is the lack of systematic research at the stage of military requirements creation prior to acquisition management phase. Influence factors were derived by focusing on the core issues that were at issue in the process of requirements analysis, requirements verification, and business management in recent years. Next, the impact factor was prioritized using the AHP technique and then alternatives were suggested. As a result, through the hierarchical analysis process, 'substantiation of necessity' was found to be the most important factor in the large category, and 'satisfaction of the operating concept' was the most important factor. In addition, as a result of calculating the final weight for each nutritional factor, it was analyzed in order of 'enemy threat response ability', 'response to operational environment change', 'performance considering operational environment', and 'guaranteed power generation'. The results of this analysis suggest which factors should be focused on, firstly, based on the concept of SE by the military and JCS.

A Study on SE Process based Defense M&S System Development Procedures (SE 프로세스 기반 국방 M&S체계 개발 절차 연구)

  • Dong Joon Lee;Seong Hyun Koh;Sang Bok Lee;Kwan Ghyun Ro;Ju Il Yoon
    • Journal of the Korean Society of Systems Engineering
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    • v.19 no.1
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    • pp.44-55
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    • 2023
  • The defense M&S system, which has been classified as a weapon system between requirements determination and project implementation, is being developed by applying the weapon system development procedure of the Defense Acquisition Program Administration. The M&S system abstracts and models the real world to suit the intended use and proceeds with the process of developing it as a software-oriented system. Overseas, the conceptual model development stage is staged before entering the design stage after the requirements analysis. In addition, each step includes verification and validation processes. In Korea, while establishing and applying the weapon system development procedure based on the SE process, the M&S system is also applied in the same way as the general weapon system, limiting appropriate development outputs and verification and validation. In this study, the system development procedure of the M&S system is established and presented based on the relevant standards and SE process of developed countries.