• 산업공학
• /
• 제5권2호
• /
• pp.19-27
• /
• 1992

The ABC analysis is a widely used inventory control technique which consists of classifying inventory items into three categories according to annual dollar usage and concentrating managerial efforts on the high value items. But its major weakness is that the classification is somewhat arbitrary and is made in the light of single criterion, the annual usage. In this paper, a modified approach using TOPSIS is proposed where 1) the inventory items are ranked, rather than classified into three categories, in the order of relative importance and 2) the latter is determined by considering the multiple criteria such as annual usage, difficulty of procurement, lead time and shelf life. A case study was performed with the field data from a company producing electronical parts. The rank order produced by TOPSIS was judged quite reasonable by the company inventory control manager.

• 한국군사과학기술학회지
• /
• 제21권4호
• /
• pp.520-528
• /
• 2018

This paper studies the optimal inventory levels of Korea Assault Amphibious Vehicle(KAAV)'s assemblies in order to assure the required operational availability. The simulation model is built and implemented for the impact of the inventory levels on operational availability. Using regression analysis and integer programming, the optimal inventory levels of essential assemblies are suggested and analyzed. Finally, sensitivity analysis is conducted with recycling maintenance delay time.

• 경영과학
• /
• 제19권1호
• /
• pp.13-28
• /
• 2002

This Paper discusses how to estimate the container yard space of a port container terminal as well as how much the Inventory level of containers Is affected by related factors such as allowable dwell time for containers, handling volume per containership, and loading/unloading productivity of a port container terminal. Under the assumption of static relations among the factors, a model for estimating the container yard space is suggested. In terms of arrival patterns of containers, sub-models for export, import, and transshipment containers are constructed separately. A numerical example and the sensitivity analysis for some parameters are provided to help intuitive understanding the characteristics of the suggested model. The experimental results show that the allowable dwell time for containers is the most critical one of the factors to influence on the maximum Inventory level of containers.

• 산업경영시스템학회지
• /
• 제30권3호
• /
• pp.20-27
• /
• 2007

A company establishes a sale strategy through the inventory to set the purchasing requisite of the customer in a global company environment. And a sale company can become the reason of a sale opportunity loss because of a customer satisfaction rate if it does not have the all thing to want a purchasing company in a business-to-business. This paper analyzes the association relation of the goods which the customer orders. And we use a datamining technique for an association analysis of goods. The result of such analysis enhances the ability to get the orders of customer and may minimize a sale opportunity loss. We present a case of the 'D' company inventory management system, in order to verify the effect of the proposal system.

• 아동학회지
• /
• 제27권1호
• /
• pp.1-15
• /
• 2006

The purpose of this study was to examine the reliability and validity of the School Adjustment Inventory for 1st grade elementary school students(SAI-1st Grade). The subjects of this study were 624 first grade children attending 40 elementary schools and 120 first grade teachers of G City. Data were analyzed by Factor Analysis(EFA), Confirmatory Factor Analysis(CFA), Pearson's r and Cronbach's ${\alpha}$. Results of the test on content validity as evaluated by the first grade teachers was high. It was found that the School Adjustment Inventory for 1st graders of elementary school was a reliable and valid measure for evaluating the school adjustment of first grade students.

• 산업경영시스템학회지
• /
• 제27권4호
• /
• pp.110-116
• /
• 2004

ABC analysis is the process of dividing inventory items into three classes according to their monetary usage so that managers can focus on items that have the highest monetary usage value, and has been widely used in practice since its development in 1950. However, the original criterion, monetary usage value, can no longer be the only rational criterion. Applying Analytic Hierarchy Process, we develop a new method to classify inventory items by considering such operationally/strategically important criteria as annual dollar usage, lead time, supplier's capacity, defective rate, difficulty of purchasing and unit price. A case study is performed applying the method to the field data from a company which produces electrochemical products.

• 한국콘텐츠학회논문지
• /
• 제20권11호
• /
• pp.391-401
• /
• 2020

본 연구에서는 Savickas 등(2018)이 개발한 학생진로구성검사(Student Career Construct Inventory, SCCI)를 한국어로 번안한 한국판 학생진로구성검사(K-SCCI)의 신뢰도 및 타당도를 검증하였다. 이를 위하여 530명의 대학생을 대상으로 문항의 내용분석, 탐색적 요인분석, 확인적 요인분석, 준거타당도 검증 등을 실시하였다. 문항의 내용분석과 탐색적 요인분석의 결과 K-SCCI는 4요인 모형과 18문항이 가장 적합한 것으로 나타났다. 4가지 요인은 직업적 자기개념 구체화, 직업탐색행동, 진로결정, 직업훈련으로 명명하였다. 4요인 모델의 적합도를 검증하기 위해 확인적 요인분석을 수행한 결과 적합한 것으로 나타났다. 척도의 준거타당도를 검증하기 위해 관련 척도와의 상관관계를 분석한 결과 학생진로구성은 취업불안과는 부적상관을 진로적응력과는 정적상관을 보였다.

• 한국시뮬레이션학회논문지
• /
• 제12권2호
• /
• pp.1-11
• /
• 2003

In this paper, we focus an optimal policy focus optimal class of (s, S) inventory control systems. To this end, we use the perturbation analysis and apply a stochastic optimization algorithm to minimize the average cost over a period. We obtain the gradients of objective function with respect to ordering amount S and reorder point s via a combined perturbation method. This method uses the infinitesimal perturbation analysis and the smoothed perturbation analysis alternatively according to occurrences of ordering event changes. Our simulation results indicate that the optimal estimates of s and S obtained from a stochastic optimization algorithm are quite accurate. We consider that this may be due to the estimated gradients of little noise from the regenerative system simulation, and their effect on search procedure when we apply the stochastic optimization algorithm. The directions for future study stemming from this research pertain to extension to the more general inventory system with regard to demand distribution, backlogging policy, lead time, and review period. Another directions involves the efficiency of stochastic optimization algorithm related to searching procedure for an improving point of (s, S).

• 디지털융복합연구
• /
• 제15권4호
• /
• pp.489-497
• /
• 2017

본 연구는 사회복지관에서 사례관리를 실천할 때 기본적으로 수행해야할 사례관리활동의 목록을 과학적 방법에 기반하여 개발하는 데 목적을 두었다. 이를 위하여 먼저 문헌조사와 전문가들의 내용타당도를 확보하여 89개의 예비항목을 개발하였다. 체계표집방식을 활용하여 전국의 사회복지관 127개소를 무작위로 선정하고, 각 기관에서 현재 사례관리를 수행하고 있는 실무자 277명을 대상으로 척도의 타당화를 확인하였다. 탐색적 요인분석, 신뢰도, 타당도 분석을 통하여 최종적으로 11요인의 61개 항목으로 구성된 사례관리활동목록을 개발하였다. 개발된 사례관리활동목록을 바탕으로 실천전략을 제시하였다.

• 부모자녀건강학회지
• /
• 제2권
• /
• pp.64-82
• /
• 1999

This study was conducted to test the reliability and validity of Maternal Self-Report Inventory that was developed by Shea and Tronick for measuring maternal self-esteem. The subjects were 154 mothers. The construct validity for the scale was tested by factor analysis with five factor loading solution based on the previous study. One item was excluded because total-item correlation was too low, so that the number of total items were twenty-five, the analysis yielded five well defined factors: confidence on the maternal role, general ability of maternal role, caretaking ability, readiness on maternal role, and feeling on the pregnancy and deli very. These five factors explained 52.38% of the variance in the maternal self-esteem. Maternal self-esteem was not affected by maternal age, educational level, occupation, religion, delivery type, or parity. The reliability of the scale was determined with Cronbach's alpha coefficient and Guttman split-half coefficient. Cronbach's alpha was .82, for 26 items, and .83 if one item was deleted. Guttman split-half cofficient was .75. In subscale analysis, Cronbach's alpha was .63~.84. In conclusion. Maternal Self-Report Inventory showed a high degree of validity and reliability, suitable in Korean mothers for measuring maternal self-esteem. In the further study, it would be necessary to compare the maternal self-esteem between mothers with normal babies and premature babies, for confirming the criterion-related validity of the inventory.