• Title/Summary/Keyword: On Time Delivery

Search Result 1,534, Processing Time 0.036 seconds

Microbiological Assessment of Home-Delivered Meals for Children from Low-income Families during Production and Delivery (결식아동을 위한 가정배달 도시락의 생산과 배달과정 중 미생물적 평가)

  • Moon, Jeong-A;Yoo, Chang-Hee;Lee, Kyung-Eun
    • Journal of the Korean Dietetic Association
    • /
    • v.19 no.3
    • /
    • pp.236-252
    • /
    • 2013
  • The purpose of this study was to assess the microbiological quality of home-delivered meals during production and delivery for children from low-income families. Production flows from a facility in Seoul that provides home-delivered meals were analyzed and the time-temperature of the food was measured. Microbiological assessment was performed for the production environment, personal hygiene, and food samples at each production and delivery step based on the process approach. It took 2 hours or longer from completion of production to meal delivery. An aerobic colony count (ACC) and coliform were not detected at knives, cutting boards, and dish towels. However, ACC (at pre-preparation, preparation, and packing areas) and coliform (at the preparation area) were detected on the hands and gloves of employees. Air-borne bacterial counts varied according to day and preparation area (ND~6 CFU/plate/15 min). Food temperatures, on the completion of production and meal delivery, fell into temperature danger zones. ACC and coliform counts of raw ingredients did not decrease after pre-preparation (washing and sanitizing) for menus involving food preparation with no cook step. ACC decreased after cooking step for menus of food preparation with cook step, but the ACC of the stir-fried and seasoned dried filefish fillet on the completion of cooking was too numerous to count due to improper heating. The ACC of seasoned young Chinese cabbages (a menu with complex food preparation) increased during delivery (from 2.5 log CFU/ml to 5.0 log CFU/ml). This qualitative assessment of foodborne pathogens revealed that B. cereus was detected in vegetable and meat product menus. These results suggest time-temperature control is necessary during production and delivery and management guidelines during production of home-delivered meals are provided for safe production.

A Design and Implementation of Multimedia Contents Delivery System Using the ZigBee (ZigBee를 활용한 멀티미디어 Contents Delivery 시스템 설계 및 구현*)

  • Kim, Min-Sung;Chung, Yeong-Jee
    • Journal of Information Technology Services
    • /
    • v.9 no.2
    • /
    • pp.151-161
    • /
    • 2010
  • Recently, as the era of ubiquitous has arrived, an infrastructure for the short-distance wireless communication has been extended socially, and thus a variety of services are being proposed. The Multimedia Contents Delivery System using the ZigBee, in particular, has an important stance in enlargement of a variety of services in the aspect of individual-oriented service support though Wireless Personal Area Network (WPAN). Nonetheless, the ZigBee, or the IEEE 802.15.4 Standard, has many restrictions on the Multimedia Contents Delivery System due to the low data transport rate. In order to improve the ZigBee which presents a limit on the transport rate at the IEEE 802.15.4 Standard, this thesis has designed the burst mode which is a method of transmitting a certain amount of data in block units at a high speed without any stoppage until the completion of the transmission. Also, to provide a Multimedia Contents Delivery Service with an application of the normal data transmission mode, it improved the transmission performance of the ZigBee. In addition, for the Multimedia Contents Delivery Service under the ubiquitous environment, it designed and implemented a broadcasting Multimedia Contents Delivery System based on the ZigBee to conduct a comparative analysis on the data transmission performance according to the transmission method.

A Study on the Performance Restoration of Deteriorated Concrete by Long Distance Delivery (장시간 운반에 따라 저하된 콘크리트의 품질회복에 관한 연구)

  • Pei Chang-Chun;Jin Hu-Lin;Hwang Yin-Seong;Lee Hyung Won;Yang Seong-Hwan;Han Cheon-Goo
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • v.y2004m10
    • /
    • pp.7-10
    • /
    • 2004
  • This paper investigated the possibility of quality restoration of deteriorated concrete caused by long distance delivery using chemical admixtures such as superplasticizer. AE agent and retarding agent. According to test results, long distance delivery lead to reducing fluidity and air content markedly, while setting time accelerated. Quality restoration agent(QRA) was made by combining super- plasticizer. AE agent and retarding agent with the proportion of 1:0.0025:0.1. It was confirmed that deteriorated concrete achieved quality restoration with the level of target slump, air content and setting time without strength loss when using QRA with proper amount.

  • PDF

A Vehicle Scheduling System for Efficient Delivery (효율적 수배송을 위한 배차계획시스템의 개발)

  • Park, Byung-Chun;Park, Jong-Youn
    • IE interfaces
    • /
    • v.11 no.1
    • /
    • pp.67-74
    • /
    • 1998
  • This study is to develop a vehicle scheduling system for the efficient delivery of goods to places of business. For gathering data and testing the system developed, we have chosen a company which is located in Taegu city and has more than 700 delivery points over Taegu city and Kyungbuk province. We consider multiple vehicle types, travel time restrictions on vehicles, vehicle acceptance restrictions at delivery points, and other operational restrictions. We divide the whole delivery points into 44 regions and generate a region-based shortest path tree. Based on the shortest path tree, we perform vehicle assignment sequentially for each vehicle used. Then vehicle routings are determined. We have implemented the whole procedure on computer system. The system developed is flexible enough to be applicable to other companies by just changing the standard data.

  • PDF

Analysis of Loading/Unloading Activity for Efficient Urban Goods Movement Plan - Focusing on Chiba City -

  • Park Sang-Chul;Yun Jeong-Mi
    • Journal of Navigation and Port Research
    • /
    • v.29 no.4
    • /
    • pp.305-312
    • /
    • 2005
  • Pick-up/delivery of consumer goods to offices, shops, and restaurants in order to support urban lives is one of the most vital activities in a city. With economic growth and technological innovation, a greater variety of goods have come to be supplied, and pick-up/delivery of consumer goods has become more complex. Efficient urban goods movement in Central Business District(CBD} starts with an efficient system for loading/unloading, and pick-up/delivery activities. Loading/unloading activity may be carried out on-street, or on especially designated space inside or outside buildings. Therefore, purpose of this study is to clarity the efficient urban goods movement in CBD(also called the pick-up/delivery activity) from the three different types of loading/unloading facilities. For this purpose, the differences in loading/unloading and truck-trip activity time of each loading/unloading facility was compared by performing the simulation analysis.

A Study on the Activities and Logistics Performance of SCM in Fashion Industry - Focused on the Supply Chain of Apparel Companies - (패션 산업의 SCM 활동수준과 물류성과에 관한 연구 - 어패럴업체의 공급 사슬을 중심으로-)

  • 홍인숙;김문숙
    • The Research Journal of the Costume Culture
    • /
    • v.12 no.4
    • /
    • pp.547-565
    • /
    • 2004
  • The purpose of this study was to evaluate the level of SCM activities and the logistics performance by SCM of the three company types in fashion industry· fabric suppliers, apparel manufacturers, and retailers. The level of SCM activities was estimated through the examination of seven factors: commitment and leadership of a top management, flexibility of management, understanding of demand characteristics, integrated management organization, information system, cooperative partnership and communication and exchange of opinion. The logistics performance was measured by improvement in customer service(on time delivery ratio of products, returning rate, treat ratio for A/S, order fill rate, substitute providing capability for being out of stock) and delivery cost reduction. Through questionnaire survey, a total of 214 data for 108 companies of three company types were collected: 46 for 40 fabric suppliers, 123 for 64 apparel manufacturers and 45 for 4 retailers. The analysis of SCM activity levels showed that fabric suppliers had higher degrees in the factor of understanding of demand characteristics, and apparel manufacturers had higher degrees in the factor of information systems. For retailers, the factor of communication and exchange of opinion represented higher degrees. The study on relationship between the SCM activity levels and logistics performance showed that the SCM activity factor of understanding of demand characteristics greatly improved a substitute providing capability for being out of stock in fabric suppliers, and information system improved a substitute providing capability for being out of stock, on time delivery ratio of products and order fill rate in apparel manufacturers. In retailers, the SCM activity factor of understanding of demand characteristics decreased returning rate highly and improved on time delivery ratio of products. The study results showed that SCM activities in fashion industry brought more improvement in customer service levels rather than in delivery cost reduction.

  • PDF

Fleet Sizing under Dynamic Vehicle Dispatching (동적 차량배차 환경에서의 차량 대수 결정)

  • Koo, Pyung-Hoi;Suh, Jungdae
    • Journal of Korean Institute of Industrial Engineers
    • /
    • v.28 no.3
    • /
    • pp.256-263
    • /
    • 2002
  • This paper addresses a planning problem in a pickup-delivery transportation' system under dynamic vehicle dispatching. We present a procedure to determine a fleet size in which stochastic characteristics of vehicle travels are considered. Statistical approach and queueing theory are applied to estimate vehicle travel time and vehicle waiting time, based on which an appropriate fleet size is determined. Simulation experiments are performed to verify the proposed procedure.

A Study on Scheduling Considering Delivery and Production Efficiency in the JIT Systems (적시생산시스템에서 납기와 생산효율성을 고려한 Scheduling)

  • Kim, Jung
    • Journal of Industrial Convergence
    • /
    • v.5 no.2
    • /
    • pp.21-32
    • /
    • 2007
  • This paper deals with the sequencing problem in the operation of the manufacturing systems with the constraint of buffer capacity. Some of studies for this theme have been progressed for several years. And then most of them considered only one objective, such as maximum lateness, machine utilization, makespan, mean flowtime and so on. This study deal with two objectives of the delivery for customers and the idle time of machines for producers. For the decision of sequence, the utility function is used. The developed heuristic algorithm presents a good solution. Through a numerical example, the procedures of the job sequencing is explained.

  • PDF

Heuristic for Vehicle Routing Problem with Perishable Product Delivery (식품 배송의 특성을 고려한 차량경로문제의 발견적 해법)

  • Kang, Kyung Hwan;Lee, Young Hoon
    • Journal of Korean Institute of Industrial Engineers
    • /
    • v.33 no.2
    • /
    • pp.265-272
    • /
    • 2007
  • The purpose of Vehicle Routing Problem (VRP) is to design the least costly (distance, time) routes for a fleet of identically capacitated vehicles to serve geographically scattered customers. There may be some restrictions such as the maximal capacity for each vehicle, maximal distance for each vehicle, time window to visit the specific customers, and so forth. This paper is concerned with VRP to minimize the sum of elapsed time from departure, where the elapsed time is defined as the time taken in a moving vehicle from the depot to each customer. It is important to control the time taken from departure in the delivery of perishable products or foods, whose freshness may deteriorate during the delivery time. An integer linear programming formulation is suggested and a heuristic for practical use is constructed. The heuristic is based on the set partitioning problem whose performances are compared with those of ILOG dispatcher. It is shown that the suggested heuristic gave good solutions within a short computation time by computational experiments.

An Optimal Distribution Model under Consideration of Delivery Unit and Backlogging Costs (수송단위에 의한 지연납기를 고려한 최적 수송량 결정 모형)

  • Lee, Yang Ho;An, Joon-Hong;Choi, Gyunghyun
    • Journal of Korean Institute of Industrial Engineers
    • /
    • v.29 no.3
    • /
    • pp.206-212
    • /
    • 2003
  • In this paper, we propose a mathematical optimization model with a suitable algorithm to determine delivery and backlogging quantities by minimizing the total cost including the penalty costs for delay. The system has fixed transshipment costs and demands are fulfilled by some delivery units that represent the volume of delivery amount to be shipped in a single time period. Since, backlogging is allowed, demands could be delivered later at the expense of some penalty costs. The model provides the optimal decisions on when and how much to he delivered while minimizing the total costs. To solve the problem, we propose an algorithm that uses the Lagrangian dual in conjunction with some primal heuristic techniques that exploit the special structure of the problem. Finally, we present some computational test results along with comments on the further study.