• Title/Summary/Keyword: Manhour

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Establishment of Standard Time for Stranding Process of A Cable Company in Small Quantity Batch Production System (전선제조 연합공정의 표준시간 설정 - 다품종소량생산시스템을 중심으로 -)

  • Lee, Kyoung-Jong
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.35 no.3
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    • pp.95-102
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    • 2012
  • It is not easy to establish the correct standard time and standard manhour in a process of small quantity batch production system, especially in a case of irregular quantity of production. Therefore, how to establish rational standard time about manufacturing process of a power cable company which is representative business for small quantity batch production system will be suggested in this paper. Furthermore, how to establish standard manhour which can be used for effective control of labor productivity will also be presented.

Manpower Simulation for the Power Plant Design Engineering (발전소 설계 인력 수요의 통계적 분석)

  • Byung Soo Moon;Poong Eil Juhn
    • Nuclear Engineering and Technology
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    • v.14 no.1
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    • pp.1-9
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    • 1982
  • Some observations from the examination of actual manhour curves for the power plant design engineering obtained from Sargent & Lundy Engineers and of a few of the model curves proposed by Bechtel, are analyzed in this paper. A model curve representing typical design engineering manhour has been determined as a probability density function for the Gamma Distribution. By means of this model curve, we strategically forecast the future engineering manpower requirements to meet the Government's long range nuclear power plan. As a sensitivity analysis, the directions for the localization of nuclear power plant design engineering, are studied in terms of the performance factor for the experienced versus inexperienced engineers.

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A Statistical Method on the Estimation of the Maintenance Manpower of Aircraft (통계적 방법을 이용한 항공기 정비인력산정)

  • 송근우;최석철
    • Journal of the military operations research society of Korea
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    • v.26 no.1
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    • pp.70-88
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    • 2000
  • In this research we consider a statistical model to estimate the optimal maintenance manpower of aircraft which we use at present. We design a multiple regression model, apply to three types of aircraft to estimate the optimal maintenance manpower of aircraft. This paper provides reasonable results about maintenance manpower of aircraft, and contributes accomplishment of mission for air and air support operations.

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Risk Assessment and Airworthiness Study for the Development of IFS A/C (공중모의비행시험기 개조개발 위험도 분석 및 감항인증 연구)

  • Ko, Joon Soo;Ahn, Jong Min
    • Journal of the Korea Institute of Military Science and Technology
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    • v.16 no.2
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    • pp.138-145
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    • 2013
  • Airworthiness certification is a government certification for the military aircraft to safely attain, sustain and terminate flight and It is a mandatory process of qualifying the flight safety within the operational boundaries of a military aircraft. To save the manhour, time and cost for applying all the airworthiness certification criteria to the aircraft equipped with flight control switching mechanism development program, an identification of the risk and systematic assessment of risk is analysed. Airworthiness redesign actions so called software switching mechanism for the modified aircraft in the flight technology and electric system area are suggested to reduce the risk hazard index.

A Design of the Intelligent Motor Control Center Using the Graphic Editor (그래픽 에디터를 이용한 지능형 전동기 제어반 설계)

  • Lee, Sung-Hwan
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.55 no.3
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    • pp.128-132
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    • 2006
  • The previous MCCs(Motor Control Centers) have the demerits of high cost and much manhour for rework because it is impossible for us to standardize the previous MCCs and they have many manual connections. The customers require the products which can operate with the SCADA system by digitalizing the functions of the current MCCs and the systematized products with capability of remote control. To solve these disadvantages and requirements, we developed the Intelligent Motor Control Center. This system has the various functions such as protection, measuring, and communication. Using these functions, we can monitor motor status through communication with the upper system and define the circuit for lowering connection costs according tn starting type and shortening the manufactural period by the graphic editor. The development of this system results in establishment of the competitive structure with domestic area and Perfect automatic monitoring through linkage with the SCADA system.

A Development of Electronic Motor Control Systems (전자식 모터제어 시스템 개발)

  • Lee, Sung-Hwan;Yi, Seok-Ju
    • Proceedings of the KIEE Conference
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    • 2000.11a
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    • pp.76-78
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    • 2000
  • The previous MCC's have the demerits of high cost and much manhour for rework because they are impossible for the standardization of products and have many manual connections. The customers require the products which can operate in connection with SCADA system by digitalizing the functions of the current MCC's and are systematized with capability of remote control. To solve these disadvantages and requirements, we developed the Electronic Motor Control System according to starting type for applying to fields based on this. This system has the various functions such as protection, measurement, and communication. Using these functions, it can monitor motor status through communication with the upper system and define the circuit for lower connection cost according to starting type and shorter manufacture period by program. The development of this product results in establishment of competitive structure with domestic competition and perfect automatic monitoring through linkage with SCADA system. In addition, it provides the comparable dominancy of receiving on orders in switch gear and adaptability to change of MCC market in Japan and Europe.

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Motor Protection and Control with Digital Protective Relays (디지털 보호 계전기를 이용한 모터 보호 및 제어)

  • 이성환;안인석
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.178-178
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    • 2000
  • In this paper, intelligent methods using digital protection relay in power management and control system is developed in order to protect power systems by means of timely fault detection during operation and control at starting for induction motor which have various load environments and capacities in power systems. The digital protective relay was designed with DSP CPU(TMS320C31) to Protect and measure more quickly and precisely. The test result on the basis of KEMCl120 and IEC60255, show that the operation time error of the digital motor protection relay is improved within $\pm$5%. Also, we can control motors at starting according to starting types with simple method as programmable sequence editor. So we can improve the demerits of high cost and much manhour for rework.

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Power Monitoring and Distributed Control by Digital Relay (디지털 계전기를 이용한 전력감시 및 분산제어)

  • Lee, Sung-Hwan;Park, Sang-Bae;Ahn, Ihn-Seok
    • Journal of the Korean Society of Industry Convergence
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    • v.4 no.3
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    • pp.263-266
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    • 2001
  • In this paper, intelligent methods using digital protection relay in power SCADA system is developed in order to protect power systems by means of timely fault detection during operation and control at starting for induction motor which have various load environments and capacities in power systems. The digital protective relay was designed with DSP CPU(TMS320C31) to protect and measure more quickly and precisely. The test result on the basis of KEMC 1120 and IEC60255, show that the operation time error of the digital motor protection relay is improved within ${\pm}5%$. Also, we can control motors at starting according to starting types with simple method as programmable sequence editor. So we can improve the demerits of high cost and much manhour for rework.

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A Cost Model for an Activity in Ship Production (선박 건조의 생산단위에 대한 Cost Model)

  • Jeong-Je Kim
    • Journal of the Society of Naval Architects of Korea
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    • v.28 no.1
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    • pp.197-205
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    • 1991
  • A methodology of constructions a mathematical cost model for an activity constituting ship hull assembly process is proposed. The relationship between number of workers and processing time required for an activity can be formulated using an work study method, then manhours and shop floor area-hours required are calculated accordingly. The costs for unit manhour and unit shop floor area-hour respectively are calculated by distributing the overall annual cost of the company to the overall production resources consummed during the year. A general procedure of implementing the methodology has been demonstrated through a test on an exampled activity drawn from a real process.

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Man Hour Prediction Model for ROK Navy's Maintenance Based on Machine Learning (머신러닝 기반의 해군 정비인시 예측 모델)

  • Jun-Min Yoo
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2023.07a
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    • pp.339-342
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    • 2023
  • 해군에서 운용하는 각 함정은 여러 가지 무기체계를 동시에 탑재하고 있는, 고가의 복합무기체계이다. 주어진 기간동안 효과적인 정비를 수행함으로써, 가동률을 극대화하는 것이말로 복합무기체계인 함정을 효과적으로 운용하는 방법이며, 경제적인 국방운용이라 부를 수 있을 것이다. 정비인시는 여러 무기체계가 동시에 탑재된 복합무기체계 정비의 핵심이다. 정비인시를 정확하게 알고 있어야만, 제한된 정비기간을 각 무기체계에 정확히 할당할 수 있을 것이며, 최적의 요소에 대한 정비가 수행될 수 있을 것이다. 본 연구에서는 해군에서 운용중인 특정장비에 대한 약 10년간의 정비자료를 이용하여 정비인시를 예측하는 모델을 제안하였다. 모델의 성능은 R2 Score를 통해 0.69의 준수한 수치를 보였다. 이 모델을 통해 조금더 세밀하고, 정확한 정비인시 예측과 정비계획 수립이 가능하리라 판단하였다.

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