Industrial disasters cause lots of damages from individuals to companies and country. Especially, damages caused by constructional disasters take very large portion in the whole industry and are accompanied by huge personal·physical damages. For the prevention of disasters, roles of safety manager are very important and especially, effects of disaster prevention can be changed by occupational ability of construction safety manager. To improve job abilities of safety manager, job education is very important. This research suggested a model for job education management of construction safety manager and proposed improvements as a study on improvement of curriculum for vitalization of job education of construction safety manager so as to improve occupational ability of safety manager. To achieve them, this research examined standard and operation status of current job education of safety manager and the problems and suggested a model materializing job educational contents as a measure to vitalize job education system of safety manager.

The objective of this study is to find the optimal size of splined shaft in IMS module. Two methods were used in this study. One is for the investigation of effect of indentation process on the tubular shaft yoke, and another is for the investigation of effect of indentation process on splined shaft. The spline outer size of splined shaft was increased from 0.00mm to 0.20mm. The simulation results were analyzed and compared in terms of under-fill, metal flow, effective strain, Von-mises stress and load characteristics. The indentation load was increased with increasing of spline size. However, in case of 0.15mm outer diameter increasing, the separation load was decreased. The case of 0.10mm diameter increasing was the best spline size based on the low indentation load and high separation load.

The purpose of this research isto make improve productivity through process improvement without expensive capital investment in a small scale mold manufacturer. The target company which is selling sand mold casting products employs many foreigners, and 50% of factory workers worked by the periphery of a specific manufacturing sector were difficult to communicate smoothly on site. Also, the company has the customized production method which production and delivery time are constant each month. However, the company's situation is getting harder since the order volume of existing suppliers has decreased and profit has reduced. So, we decided that the company needs new customers and overseas markets in the long run but to improve the process without facility investment in the short term is important task. We improved the process, created the standard of work for foreign workers, and improved the working environment by eliminating the on-site risk factors that the staff could not perceive. The results were as follows. The productivity has improved by 1.5 times. Training by work standards has shortened the OJT time of new workers and efficient working methods have become standard. Improvement of the work environment has improved the job satisfaction of workers and enabled long-term service of workers in the mold industry where labor shortage is serious.

In this study, H13 tool steel sculptures are built by a metal 3D printing process at various laser scan speeds. The properties of commercial H13 tool steel powders are confirmed for the metal 3D printing process used: powder bed fusion (PBF), which is a selective laser melting (SLM) process. Commercial H13 powder has an excellent flowability of 16.68 s/50 g with a Hausner ratio of 1.25 and a density of 7.68 g/cm3. The sculptures are built with dimensions of 10 × 10 × 10 mm3 in size using commercial H13 tool steel powder. The density measured by the Archimedes method is 7.64 g/cm3, similar to the powder density of 7.68 g/cm3. The hardness is measured by Rockwell hardness equipment 5 times to obtain a mean value of 54.28 HRC. The optimum process conditions in order to build the sculptures are a laser power of 90 W, a layer thickness of 25 μm, an overlap of 30%, and a laser scan speed of 200 mm/s.

교정시설은 수용자의 교정, 교화를 실천하여 건전한 사회복귀를 도모하고 이를 통해 국민의 안정된 삶을 구현하는 국가적으로 매우 중요한 시설이다. 관리자의 근무, 복지, 감독뿐만 아니라 수용자의 거주, 교육, 작업, 후생, 의료, 체육시설 등 매우 복합적인 기능을 효율적으로 묶어내는 건축계획은 수용자의 효율적인 계호와 동시에 그 인권을 존중하는 균형 잡힌 교정철학을 실천하는 가장 핵심적 조건이다. 이에 본 연구는 교정시설 성능향상을 실현하기 위한 방편으로 먼저 건축프로세스에 주목하고, 그 선진화 방안을 제시하는 것이 목적이었다. 기획단계에서부터 설계 및 시공에 이르기까지 프로세스의 주요단계를 점검하고, 의사 결정 과정과 여러 참여 주체 등을 파악하고 면담하였다. 대안 건축프로세스를 모색하고자 선진사례로 일본 교정시설을 선정하고, 답사와 시설관련 담당자와의 면담을 실행 후 국내 교정시설 건축프로세스 개선을 위해 장, 단기 실천 방안으로 분류하여 다음과 같이 5가지 방안을 제안한다. (1) 일선기관(End User)의 역할 강화를 통한 실무협의회 내실화(단기적 실천방안) (2) 일선기관(End User) 초기 구상단계 참여(단기적 실천방안) (3) 교정시설 건축위원회 구성(예상 준비 기간 6개월~1년) (4) 건축설계표준 개정 및 위상강화(※ 필수적으로 빠른 시일 내에 실행되어야함) (5) 교정기관 내 자체 설계팀 구축(장기적 실천방안)

The TRIZ is promoted by Altshuller of the former Soviet Union. It stands for the beginning of Russian Teoriya, Reshiniya, Izobretatelskikh, and Zadatch, which means theory, solution, invention and problem. The TRIZ problem solving method is a generalized method for the abstract area to find a concrete solution, while the approach of the existing problem solving methodologies directly finds solutions through trial and error for the problems that have occurred. The original TRIZ was spotlighted as a creative problem solving methodology. However, we are unable to distinguish between the 39 parameters of the approach methodology and the 40 inventive principles. In this study, we propose a methodology to apply the weighting to the parameters and the principle of the invention to improve the problem of TRIZ. For this purpose, this study proposes a methodology based on AHP and QFD among industrial engineering methodologies. This result suggests that future researchers will be able to suggest better decision - making methods.

As a result of frequent occurrence of serious industrial accidents due to chemical substances, Korea Occupational Safety & Health Agency has been implementing the PSM system (process safety management) since 1996, and the target sites are required to submit process safety reports. In the semiconductor business, which is becoming smaller and more integrated as the technology advances, many of these hazardous chemicals are used. Most of the semiconductor sites are PSM target sites, and many devices are included in the PSM target equipment. This study optimizes the introduction and setup process of new equipments in the semiconductor workplace using harmful hazardous materials, and conducted an empirical study on the improvement of the safety risk, focusing on the S group semiconductor business, and applied the common standard of work under the PSM system This is an example of improving the risk of leakage of toxic gas components and waste of rework by arranging functions and risks in the space centering method

The global small and mid-sized display market is changing from thin film transistor-liquid crystal display to organic light emitting diode (OLED). Reflecting these market conditions, the domestic and overseas display panel industry is making great effort to innovate OLED technology and incease productivity. However, current OLED production technology has not been able to satisfy the quality requirement levels by customers, as the market demand for OLED is becoming more and more diversified. In addition, as OLED panel production technology levels to satisfy customers’ requirement become higher, product quality problems are persistently generated in OLED deposition process. These problems not only decrease the production yield but also cause a second problem of deteriorating productivity. Based on these observations, in this study, we suggest TRIZ-based improvement of defects caused by glass pixel position deformation, which is one of quality deterioration problems in small and medium OLED deposition process. Specifically, we derive various factors affecting the glass pixel position shift by using cause and effect diagram and identify radical reasons by using XY-matrix. As a result, it is confirmed that glass heat distortion due to the high temperature of the OLED deposition process is the most influential factor in the glass pixel position shift. In order to solve the identified factors, we analyzed the cause and mechanism of glass thermal deformation. We suggest an efficient method to minimize glass thermal deformation by applying the improvement plan of facilities using contradiction matrix in TRIZ. We show that the suggested method can decrease the glass temperature change by about 23% through an experiment.

Garlic (Allium sativum) has been used as a medicinal plant due to its various functionalities such as reduction of cholesterol levels. The purpose of this study was to optimize conditions for the production of microencapsulated garlic powder (MGP) coated with whey protein isolate (WPI) to improve its production yield. WPI was mixed with distilled water followed by magnetic stirring at 500 rpm for 12 h to hydrate it completely. Garlic powder (GP) was added into the WPI mixture. Ratio of GP to WPI was 1:1. Subsequently, GP-WPI mixture was homogenized, and then spray-dried. To maximize the production yield of MGP, variables such as the mixing time and homogenizing condition such as rpm and time were tested. The optimum conditions for producing MGP were found to be as follows: GP and WPI mixing for 1 h and homogenizing at 8100 rpm for 10 min which improved liquid flow rate during spray drying process. The production yield of MGP under optimum conditions was 25.6 g/h. The results of this study might provide scale-up parameters on applications of GP for its commercialization.

목 적: 광주광역시 안경사를 대상으로 계층화 의사결정방법(AHP)를 활용하여 안경원 경영향상 요인 중 요도 및 우선순위에 대해 알아보고자 한다. 방 법: 안경원 경영향상 요인 중 중요요인을 이원비교하기 위해 광주광역시 안경사를 대상으로 계층화 의사결정방법(AHP)을 이용하여 상대적인 중요도 및 우선순위를 조사하였다. 안경원 경영향상 요인 중요도 및 우선순위 분석은 일관성 확보를 위해 일관성 비율 0.1 미만일 때 분석하였다. 결 과: 계층화 의사결정방법 분석 결과 안경원 경영향상 요인 중 Level 2항목 중요도는 상품/서비스가 가장 중요한 요인으로 분석되었다. Level 3항목별 중요도는 Level 3(01)은 전문안경사, Level 3(02)는 학교 에서 가까움, Level 3(03)은 홍보(전단지, 신문광고), Level 3(04)는 안경사의 신뢰성, Level 3(05)는 가격 의 적정성이 중요하다고 분석되었다. Level 3항목 우선순위는 안경사의 신뢰성(0.2552)으로 분석되었다. 결 론: 안경원 경영향상 요인 중요도 및 우선순위는 특정 관리자의 경험에 의존하던 안경원 경영을 좀 더 합리적이고 과학적 방법인 계층화 의사결정방법(AHP)을 적용함으로써 합리성을 높일 수 있으며, 그 결과 안경사의 신뢰성(0.2552)이 가장 중요한 요인으로 나타났다.

Industry 4.0’s goal is the ‘Smart Factory’ that integrates and controls production process, procurement, distribution and service based on the fundamental technology such as internet of the things, cyber physical system, sensor, etc. Basic requirement for successful promotion of this Industry 4.0 is the large supply of semiconductor. However, company I who produces dicing blades has difficulty to meet the increasing demand and has hard time to increase revenue because its raw material includes high price diamond, and requires very complex and sensitive process for production. Therefore, this study is focused on understanding the problems and presenting optimal plan to increase productivity of dicing blade manufacturing processes. We carried out a study as follows to accomplish the above purposes. First, previous researches were investigated. Second, the bottlenecks in manufacturing processes were identified using simulation tool (Arena 14.3). Third, we calculate investment amount according to added equipments purchase and perform economic analysis according to cost and sales increase. Finally, we derive optimum plan for productivity improvement and analyze its expected effect. To summarize these results as follows : First, daily average blade production volume can be increased two times from 60 ea. to 120 ea. by performing mixing job in the day before. Second, work flow can be smoother due to reduced waiting time if more machines are added to improve setting process. It was found that average waiting time of 23 minutes can be reduced to around 9 minutes from current process. Third, it was found through simulation that the whole processing line can compose smoother production line by performing mixing process in advance, and add setting and sintering machines. In the course of this study, it was found that adding more machines to reduce waiting time is not the best alternative.

The purpose of this study is to improve a process of the automatic manufacturing system for producing a phosphor bronze wire developed the previous study. For this purpose, the authors have improved the manufacturing process, such as wire tension control, discoloration, winding and the control appears as a problem when the automatic manufacturing system applied to the field. Also, performance tests for the developed system such as the straightness, tensile strength, hardness, diameter deviation, discoloration have been performed. As a result, we could product the 0.35mm of phosphor bronze wire with continuous processes. The performance of the prototype system satisfies all the objects of this study.

The purpose of this study was produced after performing a designed in a new way to improve the existing process waste wire break trial were as follows. After the production process to improve the existing design for a device that can break the new waste wire was manufactured prototypes. This year is expected to generate 2,200 ten thousand won gains in productivity through process improvement. If introduce a new method that improves the conventional method was expected to improve the productivity of 20% made year.

The purpose of this paper is to analyze the problems and the sources of defective products and draw improvement plans in a small plastic boat manufacturing process using TOC (Theory Of Constraints) and statistical analysis. TOC is a methodology to present a scheme for optimization of production process by finding the CCR (Capacity Constraints Resource) in the organization or the all production process through the concentration improvement activity. In this paper, we found and reformed constraints and bottlenecks in plastic boat manufacturing process in the target company for less defect ratio and production cost by applying DBR (Drum, Buffer, Rope) scheduling. And we set the threshold values for the critical process variables using statistical analysis. The result can be summarized as follows. First, CCRs in inventory control, material mix, and oven setting were found and solutions were suggested by applying DBR method. Second, the logical thinking process was utilized to find core conflict factors and draw solutions. Third, to specify the solution plan, experiment data were statistically analyzed. Data were collected from the daily journal addressing the details of 96 products such as temperature, humidity, duration and temperature of heating process, rotation speed, duration time of cooling, and the temperature of removal process. Basic statistics and logistic regression analysis were conducted with the defection as the dependent variable. Finally, critical values for major processes were proposed based on the analysis. This paper has a practical importance in contribution to the quality level of the target company through theoretical approach, TOC, and statistical analysis. However, limited number of data might depreciate the significance of the analysis and therefore it will be interesting further research direction to specify the significant manufacturing conditions across different products and processes.

This paper suggests a procedure to define business process improvement (BPI) projects with analysis results based on the cause-and-effect chain. The procedure developed in this paper focuses on eliminating root causes of business problems resulted from abnormal events occurred in business process executions. First, we develop three criteria used to make clusters of the root causes where a cluster of root causes will be eliminated together by a BPI project defined based on the cluster. Second, we develop a method to formulate desired expectations from the BPI project. Also, we suggest a method to calculate the relative importance of the BPI projects that help a BPI organization determine priorities of them. We illustrate the procedure and the methods with some examples for the domestic mail delivery process in the postal service industry.