• 제목/요약/키워드: Inventory analysis

검색결과 1,472건 처리시간 0.031초

A Study on the Improvement of the ABC Analysis using TOPSIS (TOPSIS 모형을 이용한 ABC분석(分析)의 개선(改善)에 관한 연구(硏究))

  • Cho, Sung-Ku;Jung, Sang-Yun
    • IE interfaces
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    • 제5권2호
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    • pp.19-27
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    • 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.

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Impact of KAAV's Essential Assemblies and Maintenance Float Inventory Levels on Operational Availability (시뮬레이션에 기반한 KAAV 주요 수리부속과 정비대체장비 재고수준이 운용가용도에 미치는 영향 연구)

  • Jeon, Hongjoo;Ma, Jungmok
    • Journal of the Korea Institute of Military Science and Technology
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    • 제21권4호
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    • pp.520-528
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    • 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.

A Mathematical Model for an Analysis of Container Inventory under Deterministic Environment (확정적 상황에서 컨테이너 재고량 분석을 위한 수리모형)

  • 배종욱;김기영
    • Korean Management Science Review
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    • 제19권1호
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    • pp.13-28
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    • 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.

A Case Study on the Inventory Management Using the Dataminning (데이터마이닝을 이용한 재고관리에 관한 사례연구)

  • Lee, Kyu-Yong;Seo, Jun-Yong
    • Journal of Korean Society of Industrial and Systems Engineering
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    • 제30권3호
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    • pp.20-27
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    • 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.

Validation of School Adjustment Inventory for First Grade Elementary School Students (초등학교 일학년용 학교적응 척도 타당화 연구)

  • Chi, Sung-Ae;Jung, Dae-Hyun
    • Korean Journal of Child Studies
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    • 제27권1호
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    • pp.1-15
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    • 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.

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Development of an Analytic Hierarchy Process Model for the Multi-item Inventory Control (다품목 재고관리를 위한 계층분석모형의 개발)

  • Kim Sung-Kyu;Lee Ji-Soo;Kim Jeong-Seob
    • Journal of Korean Society of Industrial and Systems Engineering
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    • 제27권4호
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    • pp.110-116
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    • 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.

Validation of the Korean Version of the Student Career Construct Inventory(K-SCCI) (한국판 학생진로구성검사 타당화 연구)

  • Park, Ji-Yeon;Cho, Kyung-Duk;Shim, Ho-Kyu
    • The Journal of the Korea Contents Association
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    • 제20권11호
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    • pp.391-401
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    • 2020
  • This study verified the reliability and validity of the Korean version of the Student Career Construct Inventory(K-SCCI) that was translated into Korean language from the Student Career Construct Inventory (SCCI) developed by Savickas et al.(2018). To achieve this, this study conducted item content analysis, exploratory factor analysis, confirmatory factor analysis, and criterion-related validity in 530 university students. As a result of item content analysis and exploratory factor analysis, it was found that 4 factor models and 18 items were the most appropriate in K-SCCI. The 4 factors were named as crystallizing a vocational self-concept, exploring to gather information about occupations, deciding to commit to an occupational choic, and preparing to implement that choice. As a result of confirmatory factor analysis to verify the goodness-of-fit of the 4 factor models, it appeared to be appropriate. As a result of analyzing the correlation with related measures to verify the criterion-related validity of measures, it was found that student career construct was negatively correlated with employment anxiety but positively correlated with career adaptability.

Application of Stochastic Optimization Method to (s, S) Inventory System ((s, S) 재고관리 시스템에 대한 확률최적화 기법의 응용)

  • Chimyung Kwon
    • Journal of the Korea Society for Simulation
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    • 제12권2호
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    • pp.1-11
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    • 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).

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Development of Case Management Activities Inventory in Community Welfare Centers (사회복지관 사례관리 활동목록 개발)

  • Min, So-Young
    • Journal of Digital Convergence
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    • 제15권4호
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    • pp.489-497
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    • 2017
  • The purpose of this study is to develop case management activities inventory and analyze the perception on case management practice using importance-performance analysis(IPA) in community welfare centers. The comprehensive literature review and the content analysis from the professional scholar and social workers produced 89 items of case management activities items. A survey was conducted to 277 case managers in community welfare centers. The exploratory factor analysis, reliability and validity analysis developed the case management activities inventory comprised of 11 factors and 61 items. Suggestions were made to improve case management practice in community welfare centers.

Confirmatory Analysis of Maternal Self-Report Inventory (Maternal Self-Esteem) (모성자존감 측정도구의 검증)

  • Han, Kyung-Ja;Bang, Kyung-Sook
    • Korean Parent-Child Health Journal
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    • 제2권
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    • pp.64-82
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    • 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.

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