• Transactions of the Korean Society of Mechanical Engineers
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• v.18 no.1
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• pp.223-231
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• 1994

When manufacturing mold dies, an operation sheet is required for each part of the mold dies. The consistent estimation of standard operation time in the operation sheet is difficult, because the estimation is mainly based on subjective judgement. In order to resolve it, concept of feature is introduced in this study. For CAD/CAPP integration, feature technology is being implemented to represent geometrical and technological information of part drawings. A feature database has already been designed, and then used to generate data for process and operation planning modules. Related to this former research, standard operation time is calculated using the feature information and tables used in a real factory.

• Journal of Industrial Convergence
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• v.8 no.1
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• pp.19-31
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• 2010

The purpose of this study was to set the standard man-hour of welding work. The case study was conducted at C Tech where makes and installs conveyor. Because most of orders are non-fixed, all jobs are vary in shape and size. To conduct this study, drawings of sample were reviewed and compared with measured man-hours of welding works. As a result, the different ratio of expected require man-hour and measured man-hour was 4%. It is reasonable that the present applied efficiency of aimed man-hour is 85%.

• Journal of Welding and Joining
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• v.1 no.1
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• pp.21-29
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• 1983

용접구조물에는 필연적으로 용접에 의해서 생기는 부정량이 존재한다. 용접에 의해서 건조되는 선체구조에 있어서도 misalignment를 비롯하여 과대한 gap, 팬널(panel)의 초기변형, 용접에 의한 수축과 같은 부정량이 존재하여 선속 불록의 정도와 선체 강도에 영향을 주게 된다. 그래서 일본에서는 건조되는 동선의 품질을 고도로 유지하면서 공수를 될 수 있는 한 줄이기 위하여 이론과 실속이 뒷받침된 신속도가 높은 품질표준을 설정하는 것이 필요하다고 판단하여 1964년에 '일본동선공작법표준, japan shipbuilding quality standard(JSQS)'를 제정하였다. 그 내용에는 소재, 현도, 내용 가공부재, 조립 블록, 선형확보, 다듬질, 변형량등 주로 공정순에 따라 각각 구 분을 정한 항목마다 표준범위와 허용 한계가 표시되어 있다. 지금부터 용접에 의한 부정량의 대표예로써, 용접에 의한 변형과 잔유응력, 이음에서의 gap과 misalignment에 대하여 말하고 아울러 부정량과 JSQS와의 관계에 대해서도 간단히 말하겠다.

• The KIPS Transactions:PartD
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• v.11D no.5
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• pp.1105-1122
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• 2004

The organization and company's effort to improve software qualify contributes to the increase of software productivity and quality in some sense. However, it has not been a solution of root causes. This result is caused not because of people or technology, but process in-stitutionalization. Recently SQA (Software Quality Assurance), which provide mechanism to make sure that the software development process and products follow the assigned requirements, plan and standards, is applied to achieve the quality improvements. Several standards and models are developed for SQA activities. However, those standards and mode]s are written in form and do not provide information related to the detailed procedures, methods and outputs. Therefore, the organizations that want to adopt those models or standards have to put a lot of effort to acquire the knowledge about the models and to set up SQA Process that is tailored to meet organization's goal and objectives. In this research, we developed SQA support package to support the organization to develop their SQA process in more convenient and systematic ways. With this package, the organizations can establish SQA Process by tailoring those features necessary to reflect organization's characteristics. We expect this package contribute the organizations in a way that it reduce the effort and cost for establishing SQA process.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2006.11a
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• pp.670-673
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• 2006

본 연구는 프로젝트 계획에서 마감까지의 전 프로세스를 소규모 IT 업체의 현실에 맞게 간략화하고 효율화 하는 방안을 다룬다. 개발자들의 추가투입 공수를 최대한으로 줄이고, 최소한의 노력으로 최적의 프로세스 관리가 되도록 하는 소프트웨어 프로젝트 관리 모델을 개발한다. 이를 통해 프로젝트에 예상되는 실행 액티비티 , 단계별 산출물을 정의하고 실행단계별 작업 표준을 제정해서 표준안을 따라 하는 것만으로 일정수준이상의 프로젝트 관리가 되도록 한다. 또, 연구된 관리 모델을 기반으로 이를 지원하는 시스템을 실제 개발, 적용하여 연구된 내용의 실제 적용가능성을 높인다.

• Journal of the Korea Society of Computer and Information
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• v.29 no.1
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• pp.139-149
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• 2024

In this paper, we propose the standard architecture for the IFF interface SW in naval combat management system(CMS). The proposed standard interface architecture is a method designed to reduce modification efforts and man-month of reliability test for the existing the IFF interface SW of 11 types. We identified highly dependent CMS and GFE information, leading to the redefinition of standard requirements and functions, and proceeded with the initial design applying the Naval Shield Component Platform(NSCP). Subsequently, using the Feature Model, we derived additional common and variable elements for the interface of multiple CMS and GFE. Considering the S.O.L.I.D principles, we designed the final architecture. The proposed IFF Interface SW, based on the standard architecture, is expected to enhance management efficiency through a common architecture, increase code reusability and scalability, and reduce development costs by shortening reliability testing times.

• Journal of the Korea Safety Management & Science
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• v.12 no.2
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• pp.147-152
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• 2010

Project implementation plan is a blueprint that confirms project performance activities and specifies required man-hour, period and resource imput ratio. Various figures, the results of implementation plan, are predicted through estimation, and because of superiority of objectivity and repeatability, numerical formula-based estimation model is often used overseas. COCOMO model is the representative estimation model whose theories and formulas are publicized and it predicts the total man-hour required for software system development. This model is publicized in "Software Engineering Economics" written by Professor Barry Boehm of the U.S., and is the most widely applied numerical formula-based estimation model. This study is conducted to provide a series of methods that are optimal for KTDS environment by choosing COCOMO II model among various types of COCOMO models. In establishing implementation plan, COCOMO II model alone is not sufficient, it is necessary to link with and apply standard WBS system and standard man-hour. In establishing specific implementation plan, phased standard WBS system in order of the first phase of all the activities implemented in the project, Activity, Task, and Role, and the man-hour put into this should be distributed according to standard ratio from COCOMO II model's total man-hour. This study provides explainations by establishing standard WBS system and linking with COCOMO II model.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.5 no.7
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• pp.59-62
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• 1982

The purpose of this paper is to increase the effectiveness of decreasing time - load and cost down in manufacturing company using the new way of regulating standard time - load. Let us take an example of K automobile factory. This company have avoided the used to way of regulating standard ti me load in staff members and increased the effectiveness of decreasing time - load having participated all members centering around the Q.C circle. Here, We can take conclusions as below. 1. We could improve the consciousness of question and the consciousness of efficiency progress as a result of new way. 2. We could encourage the activation of organization and working desire of all members to be participated.

• Korean Journal of Construction Engineering and Management
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• v.23 no.6
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• pp.89-100
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• 2022

The development of the Construction Production Rates System for appropriate construction cost calculation has recently come to the fore as a means of invigorating OSC based PC structure which currently needs institutional frameworks. PC structure based construction expenses consist of the factory-built assembly, transportation and on-site installation. Recently, in the field of transportation and site installation, research on product structure development is being conducted, such as presenting the standard product calculation system reflecting the results of field survey for each subsidiary materials (Lee et al., 2021). On the other hand, there is no ongoing research on estimating construction expenses of Factory-built assembly. This study suggests Construction Production Rates System which can be used for PC subsidiary materials based Factory-built assembly cost estimations. For the research, work types for the construction procedures have been categorized, and the standard input manpower suitable for the corresponding work characteristics has been derived from analyzing the associated Construction Standard Production Rates for each work type. Also, as the research referred PC subsidiary materials (such as columns, beams, walls, and slab, as well as on-site installation) and the standard number of workforce based on work types, one can calculate direct labor cost, using what the research shows. In addition, it suggests that the size of individual subsidiary materials be the extra cost factor, by using the characteristics that productivity changes depending on the size(m³) of subsidiary materials. It is expected that the research can contribute to objectively verifying factory-built assembly cost through of PC structure, which currently relies on estimates.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.11a
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• pp.291-294
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• 2004

최근 많은 기업에서는 프로세스 관리를 통한 제품 품질 향상에 많은 노력을 기울이고 있다. 프로세스 관리는 제품 개발과정의 가시성을 확보함으로써 제품 개발 후 발생할 수 있는 문제를 초기에 찾아내고 해결함으로써 제품 개발에 드는 비용과 공수를 효율적으로 관리할 수 있도록 한다. 측정활동은 프로세스 관리에 필요한 데이터 식별 및 분석을 통해 프로세스 관리에 필요한 정보를 제공해 줄 수 있으며. 이를 통해 효과적으로 프로세스를 관리할 수 있게 해준다. 본 논문에서는 국내외 많은 기업들에서 프로세스 개선 모델로 채택하고 있는 CMMI 를 기반으로 측정활동에 대해 연구하였다. CMMI 에서는 조직의 성숙도 수준에 따라 5 개의 레벨로 구성되어 있으며, 이 중 측정 프로세스 수립에 대해서는 레벨 2 의 MA(Measurement and Analysis) 프로세스 영역에서 제시하고 있다. 레벨 2 에서 수립된 측정 프로세스는 레벨 2 뿐만 아니라 레벨 3, 4, 5 에서도 지속적으로 수행되어야 한다. 하지만 CMMI 에서는 레벨에 따른 측정 프로세스 관리에 관해서는 언급하고 있지 않다. 이에 본 논문에서는 CMMI의 MA 프로세스 영역을 기반으로, 측정 관련 표준 및 모델을 분석하여 측정 프로그램을 수립하고, CMMI 에서 제시하고 있는 5 개의 성숙도 수준별로 측정 프로그램이 어떠한 차이를 보이는지를 연구하여, 최종적으로 CMMI 성숙도 수준별 측정 프로그램의 적용방안을 제시한다.