• 산업경영시스템학회지
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• 제32권3호
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• pp.127-134
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• 2009

RAM(Reliability, Availability, Maintainability) is important performance factor to keep combat readiness and optimize operational and maintenance cost of weapon systems. This paper discusses the method to establish RAM for combat readiness by using field failure data from similarity equipments. Operational availability is estimated from a binomial distribution function of user's operational conditions such as combat readiness preservation probability, operational rate, operational availability and total number of equipment. Reliability and maintainability is estimated from field failure data from similarity equipment to accomplish operational availability. The effectiveness of established RAM is verified through analysis of combat readiness preservation probability and mission reliability. A case study of weapon system illustrates the process of the proposed method.

• 한국군사과학기술학회지
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• 제3권1호
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• pp.218-230
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• 2000

In the weapon system development/operation stage, the goals of RAM activities are to support the cost effective performance optimization in design and operation supports. In the study, the main contents are as follows; 1) To establish the operational concept and circumstance of the subsequent tank, the combat/operation scenario, the operational mode summary and mission profile for subsequent tank development are analyzed. 2) To evaluate the administrative and logistics down time for subsequent tank, the prefigured logistics circumstance and maintenance system are analyzed. 3) To calculate the RAM object values, a mathematical model for the user are developed. 4) To examinate the propriety of the RAM object values, the combat readiness are reviewed. The obtained RAM object values are provided to predict and analyze for the combat readiness, staying power, mission reliability, equipment availability and the logistic support capability.

• 산업경영시스템학회지
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• 제39권4호
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• pp.49-59
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• 2016

Naval combat system developed in-country is progressing at an alarming rate since 2000. ROK navy will be achieved all vessels that have combat system in the near future. The importance of System Engineering and Integrated Logistics Support based on reliability analysis is increasing. However, reliability analysis that everyone trusted and recognized is not enough and applied practically for development of Defense Acquisition Program. In particular, Existing Reliability Analysis is focusing on reliability index (Mean Time Between Failure (MTBF) etc.) for policy decision of defense improvement project. Most of the weapon system acquisition process applying in the exponential distribution simply persist unreality due to memoryless property. Critical failures are more important than simple faults to ship's operator. There are no confirmed cases of reliability analysis involved with critical failure that naval ship scheduler and operator concerned sensitively. Therefore, this study is focusing on Mean Time To Critical Failure (MTTCF), reliability on specific time and Operational Readiness Float (ORF) requirements related to critical failure of Patrol Killer Guided missile (PKG) combat system that is beginning of naval combat system developed in-country. Methods of analysis is applied parametric and non-parametric statistical techniques. It is compared to the estimates and proposed applications. The result of study shows that parametric and non-parametric estimators should be applied differently depending on purpose of utilization based on test of normality. For the first time, this study is offering Reliability of ROK Naval combat system to stakeholders involved with defense improvement project. Decision makers of defense improvement project have to active support and effort in this area for improvement of System Engineering.

• 시스템엔지니어링학술지
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• 제14권1호
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• pp.44-51
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• 2018

The purpose of RAM analysis in weapon systems is to reduce life cycle costs, along with improving combat readiness by meeting RAM target value. We analyzed the sensitivity of the RAM analysis parameters to the use of the operating system by using the Markov Process based model (MPS, Markov Process Simulation) developed for RAM analysis. A Markov process-based RAM analysis model was developed to analyze the sensitivity of parameters (MTBF, MTTR and ALDT) to the utility of the 81mm mortar. The time required for the application to reach the steady state is about 15,000H, which is about 2 years, and the sensitivity of the parameter is highest for ALDT. In order to improve combat readiness, there is a need for continuous improvement in ALDT.

• 품질경영학회지
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• 제40권3호
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• pp.245-258
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• 2012

Purpose: Recently, many quality issues are aroused in military forces, such as failures in K-series weapons, combat boots defects and 40mm ammunition explosion accident. To address these problems, the one and only government defense quality assurance agency, DTaQ(Defense Agency for Technology & Quality) tried to improve many quality assurance procedures and introduced new systems such as MRA(Manufacturing Readiness Assessment), TRA(Technology Readiness Assessment), and etc. However, as the amount of war supplies increasing every year, the resource(budget and manpower) for quality assurance is limited. Therefore, DTaQ had difficulty to handle the issue efficiently and effectively, and we propose the method to address this problem. Methods: The most popular quality assurance technique is a sampling method, in this research, we first review the many sampling techniques and compare the strength and weakness of each method. After then, we selected the most appropriate sampling techniques and applied the procedures in combat force support material and ammunition areas. Results: We can reduce the number of samples dramatically, thus the required amount of labor time and money can be saved. Also, the new sampling technique enforces the supplier to produce the product which meets the target value(desirable value). Conclusion: We can reduce the number of samples dramatically, thus the required amount of labor time and money can be saved. Also, the new sampling technique enforces the supplier to produce the product which meets the target value(desirable value). Lastly, since the new sampling method requires many numerical calculations, we developed a simple android OS smart-phone application which can be used easily in field.

• 융합보안논문지
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• 제16권6_1호
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• pp.75-83
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• 2016

병력관리는 군 사고예방은 물론 전투력 보존 및 발휘의 핵심이다. 그러나 예측하지 못한 시간과 장소에서 생각지도 못한 부대원이 사고를 유발하게 되면 경험 없는 초급간부들은 당황하며 어떻게 처리해야 할지 몰라 전전긍긍할 때가 많다. 뿐만 아니라 각종 사고를 예방하는 것도 군의 존립의 이유인 전쟁에서의 승리를 위한 전투준비태세 완비의 전제 조건이다. 이 막중한 임무의 최전선에 초급간부들이 있다. 그러나 전투준비를 위한 제반업무에 만전을 기하여야 할 시간도 부족한데 병력관리에 대한 상급부대의 지시와 요구되는 수준은 경험이 부족한 초급간부들에게 많은 스트레스를 주는 것이 사실이다. 그래서 초급간부를 위한 군 상담모델을 연구하게 되었다. 초급간부 군 상담모델을 적용하여 상담을 진행 하면 가장 신속하고도 효율적으로 상담대상에 대한 파악이 가능하다. 효율적인 상담은 깊이 있는 내담자의 이해가 선행되어야 한다. 누군가를 심층 있게 이해한다는 것은 많은 노력과 시간을 필요로 하는 행위이다. 그러나 초급간부들은 그러한 시간과 노력을 충분히 투자할 수 있는 여건이 미흡한 것이 사실이다. 그러므로 초급간부 군 상담모델을 적극 활용하여 선택과 집중을 통한 상담활동을 지속한다면 효과적인 상담 및 사고예방까지 가능할 것이다.

• 한국산학기술학회논문지
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• 제21권3호
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• pp.269-275
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• 2020

무기체계를 지원하는 요소들 중에 있어서 RAM 업무는 개발 초기단계에 수행되며, 무기체계의 작전요구성능과 함께 설계 관점에서 무기체계가 달성해야 할 기준으로 제시된다. RAM 업무 중 운용가용도는 전투준비태세를 보장하고 전쟁에서 승리하기 위한 군의 핵심요소로서, 무기체계 개발 단계에서 개발기준으로 사용되고 있다. 이러한 운용가용도의 요소에는 평균 고장간 시간, 평균 수리시간, 행정 및 군수 지연시간(ALDT: Administrative and Logistic Delay Time, 이하 ALDT) 등이 있으며, ALDT는 무기체계의 노후화, 정비정책 및 지리적인 특수상항에 달라지는 요소로 군의 전투준비태세를 위해 유지해야 하는 운용가용도의 핵심요소라고 할 수 있다. 개발 간 군은 운용가용도의 요소 중 ALDT, 운용 및 대기 시간 등을 제공하며, 제공시 ALDT가 단순 가정으로 제시되어 개발단계에서 설정되어 산출되는 운용가용도는 실제 운용단계에서 분석한 운용가용도와 상이하다. 따라서, 본 논문에서는 초기 전력화 기간 동안 획득한 고장정비 데이터를 의사결정계보기법을 적용하여 ALDT를 산출하였으며, 본 연구를 통해 전력화 운용기간 동안 개발시 설정한 운용가용도를 달성하기 위한 최적의 ALDT 설정 방안을 제시한다.

• 한국국방경영분석학회지
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• 제31권2호
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• pp.75-85
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• 2005

Even though K-series combat equipment's engine depot maintenance cycle of ROK army is 10years In average, that of the K-9 Self Propelled(SP) howitzer which has been fielded since 99 $3{\sim}4$years causing limitations to effective equipment operations and combat-readiness. Therefore, the current K-9 self-propelled howitzer engine operation period of 1,500 hours, which is greatly shorter than other equipments, had to be verified. In order to find the optimum depot maintenance cycle, related field operation conditions were verified and opinions were collected, and also the background on current depot maintenance cycle setting was studied.

• 한국국방경영분석학회지
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• 제34권3호
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• pp.41-51
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• 2008

현대전에 있어서 첨단 정밀 고가장비가 전투력에 미치는 영향은 지대하다. 그러나 평상시 지속적인 정비활동이 이루어지지 않으면 장비가동률은 저하되고 유사시 목표하는 전투력 발휘효과는 기대하기 어려울 것이다. 따라서 적정 장비유지비 소요를 예측하여 예산에 반영하는 것은 전투준비태세 완비를 위해서 필수적인 과제라 하겠다. 본 연구에서는 K-111 1/4톤 기동장비의 야전 운영 실적자료를 분석하여 장비유지비 발생추세를 분석하고, 이 분석 결과를 기초로 장비유지비 예측모델을 설계하였으며, 이 예측모델을 적용하여 장비유지비 소요 예측 기법과 향후 발전 방향에 대한 제언을 제시하였다.

• 산업경영시스템학회지
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• 제46권4호
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• pp.321-330
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• 2023

The Korean military has sought to build an all-round military force against the national and international security environment and future asymmetric threats as well as the military threats it faces. However, while raising the need for timely electrification, there are few cases of quantitatively evaluating the loss when electrification is delayed, making it difficult for our military to provide a logical basis to support the importance of the electrification period. Therefore, through this study, we tried to analyze the index of loss cost that can support the need for timely electrification with logical and quantitative data and present it as a logical basis. To this end, the loss cost was calculated in terms of combat efficiency, equipment utilization rate, and maintenance requirements, which can be quantitatively calculated based on "combat readiness," a general impact on the military in case of delayed timely electrification.