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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

A Study of Work Order Dispatching Model for Hybrid Production Systems

Leu, Li-Kao 29 July 2000 (has links)
There are many business in Taiwan that their production type are indistinct between make-to-stock and make-to-order. This kind of production type can shorten the lead time of order and decrease the fluxion of customer¡¦s demand, on it¡¦s technology of predicting customer¡¦s demand for pre-production and inventory. Thus, the efficacy of production must depend on it¡¦s precision of predicting customer¡¦s demand. Recognition that traditional work order dispatching made to some specific standardization. Therefore, it is leaded to customization product and less flexible. And the decision-maker must choose one goal between minizing inventory cost, WIP¡¦s level and lead time. The production type, work order dispatching must have flexibility,and it must accomplish the customer¡¦s order on time considering inventory cost and customer service. This thesis hopes that it would be to develop a work order dispatching method to improve the efficiency of WIP administering, the flexibility for work order dispatching and decreasing lead time of customer¡¦s order. According to production¡¦s characteristic of different manufacturing stage, it can create one applicable dispatching rules to increase the production efficiency. Finally, using simulation software, applying to case study comparing the performance of the real case and new work order dispatching
22

Integrated applications of expert system and system simulation for oil-barge dispatching study - case of Kaohsiung Harbour

Chen, Ching-Chuan 18 July 2002 (has links)
The oil barge operation in Kaohsiung harbor is one of typical systems of resources allocation problems in a complex and dynamic environment. Such system is far more difficult to deal with than a static and deterministic system and often depends on experienced human experts for the oil barge assignment. One of the major dilemmas faced by the system is that decision makers do not know the managerial efficiency under the current dispatching mechanism. Besides, if the dispatching rules have been modified due to the resource variation in the future, how would the changes affect the system? The current research is trying to develop an evaluation system for oil barge assignment. The objective of the system is to evaluate the overall performances of the oil barge operation in Kaohsiung harbor. Both expert system and system simulation techniques would be applied for such analysis. To acquire the current heuristic of oil barge assignment and then transfer it to a rule-based knowledge in an expert system, the interview with the engineer, who is responsible for making such decision, is the crucial step. With the knowledge base and the reasoning mechanism available, it is possible to imitate the current oil barge assignment. To further evaluate the performance of such assignment rule, the current research has developed the system simulation model of oil barge operation. This model is able to quantify the service quality under various assignment scenarios. The results of simulation can further be presented to the decision makers with easy-understanding animations. The case study would focus on Kaohsiung harbor¡¦s oil barge operation. The integrity and suitability of the expert system and simulation model have been validated through extensive statistical analysis. At last, various scenario analysis based on such integrated models have been conducted to improve the current oil barge operation and to set the appropriate response plans confronted by the future development of Kaohsiung harbor as the Asia-Pacific transshipment center.
23

A Study of IT Specialists Dispatching and Outsourcing in IT Department - A Case Study of A Company

Chen, Chia-Li 08 September 2009 (has links)
The current IT manpower outsourcing business growing soon, this is a case study of a electronic corporate IT department, and understand the current status of IT specialists dispatching and outsourcing in IT department. The main study is Dispatching and Outsourcing IT specialists, in order to explore the work motivation of IT specialists engage in the dispatching and outsourcing job, and the issue and effect in IT departments. Conclusions of this study would like to provide a reference to the IT department of related industries for the application of outsourcing, The main conclusions of the study are as follows: 1. The working motivation of IT specialists mostly based on personal career planning. And the feeling of fairness of the dispatching job and psychological contract breach about transferred to regular works would reduce the IT specialists¡¦ working motivation. 2. IT specialists engaged in outsourcing job were mostly in line with the company's business services, when they got low organization support and coun¡¦t fill the psychological need about ability to be recognized, the working motivation would be reduced. 3. For the long term, IT department hired dispatching IT specialists for saving HR cost, and reach the target in current organization. 4. Based on professional recognition, IT specialists were maladaptive in the human dispatching system that was low unique and value, and companies hired dispatching workers with cognitive bias would cause IT specialists to feel unfair, and created many issues. 5. IT department hired dispatching and outsourcing IT specialists to excute software project, but the requirement change was out of control caused the project scope extended without limitation, schedule delayed and cost raised.
24

Transportation relay network design

Hunt, Gregory William 08 1900 (has links)
No description available.
25

Probabilistic simulations of the optimal-secure operation of an electric power system

Reinstein, David. January 1984 (has links)
No description available.
26

Probabilistic simulations of the optimal-secure operation of an electric power system

Reinstein, David. January 1984 (has links)
No description available.
27

IDSF II: Integrated Decision Support Framework and its Application for Dispatching Policy Based on Part Similarity

Guo, Jia 18 April 2012 (has links)
No description available.
28

The Research of Advanced Planning & Scheduling System for Solving Supply Chain Production & Sales Collaboration Problems - A Case Study of IC Substrate Plant

Kung, Hao 06 September 2004 (has links)
Semiconduct industry is facing the various supply chain uncertainty problems at present. MRP/ERP (Material Resource Planning/Enterprise Resource Planning) solution can¡¦t satidfy the requirement of production planning and scheduling for the enterprise. In this research¡Aon APS (Advanced Planning & Scheduling) system was proposed for an IC (Intergrated Circuit) substrate industry to replace manual planning process and to solve the resource constraint problems of production. Following topics was addressed :
29

The impact of decentral dispatching strategies on the performance of intralogistics transport systems

Klein, Nils 17 July 2014 (has links) (PDF)
This thesis focuses on control strategies for intralogistics transport systems. It evaluates how switching from central to decentral dispatching approaches influences the performance of these systems. Many ideas and prototypes for implementing decentral control have been suggested by the scientific community. But usually only the qualitative advantages of this new paradigm are stated. The impact on the performance is not quantified and analyzed. Additionally, decentral control is often confused with distributed algorithms or uses the aggregation of local to global information. In the case of the latter, the technological limitations due to the communication overhead are not considered. The decentral prototypes usually only focus on routing. This paper takes a step back and provides a generic simulation environment which can be used by other researchers to test and compare control strategies in the future. The test environment is used for developing four truly decentral dispatching strategies which work only based on local information. These strategies are compared to a central approach for controlling transportation systems. Input data from two real-world applications is used for a series of simulation experiments with three different layout complexities. Based on the simulation studies neither the central nor the decentral dispatching strategies show a universally superior performance. The results depend on the combination of input data set and layout scenario. The expected efficiency loss for the decentral approaches can be confirmed for stable input patterns. Regardless of the layout complexity the decentral strategies always need more vehicles to reach the performance level of the central control rule when these input characteristics are present. In the case of varying input data and high throughput the decentral strategies outperform the central approach in simple layouts. They require fewer vehicles and less vehicle movement to achieve the central performance. Layout simplicity makes the central dispatching strategy prone to undesired effects. The simple-minded decentral decision rules can achieve a better performance in this kind of environment. But only complex layouts are a relevant benchmark scenario for transferring decentral ideas to real-world applications. In such a scenario the decentral performance deteriorates while the layout-dependent influences on the central strategy become less relevant. This is true for both analyzed input data sets. Consequently, the decentral strategies require at least 36% to 53% more vehicles and 20% to 42% more vehicle movement to achieve the lowest central performance level. Therefore their usage can currently not be justified based on investment and operating costs. The characteristics of decentral systems limit their own performance. The restriction to local information leads to poor dispatching decisions which in return induce self-enforcing inefficiencies. In addition, the application of decentral strategies requires bigger storage location capacity. In several disturbance scenarios the decentral strategies perform fairly well and show their ability to adapt to changed environmental conditions. However, their performance after the disturbance remains in some cases unpredictable and relates to the properties of self-organizing complex systems. A real-world applicability has to be called into question.
30

The Relationship among Job Characteristics, Job Satisfaction, Job Burnout, & Turnover Intention of Staff in Employee Dispatching Industry

Cheng, Jyh-jiuan 27 August 2007 (has links)
In recent years because of the multiplex duty border plan & the globalization competition environment competition, developed ¡§the Atypical Employment Relationship¡¨ gradually the manpower dispatch pattern¡CThe globalization increased enterprise's competitive power, in order to be survived under the entire competition, the most enterprises tend to adopt a flexible HRM system to reduce the cost, the production diversification as well as promote the product quality, except will move to the manpower cost inexpensive area, will also use the Non-traditional Employment Relationship in the non-core business execution, will create the biggest superiority. But in domestic, the Executive Yuan economic construction could announce ¡§service industry development guiding principle & the course of action¡¨ in Apr. 2004, the manpower dispatch is included one of 12 prioritize industries, in this plan to the manpower dispatch service entrepreneur hoped could achieve 1000~2000 market capacities, but to dispatched the laborer to hope could achieve 300,000 people ¡CThis plan, attracts the entrepreneur who favors this market sesame seed cake to take place of the fallen invests this industry. Is engaged in the manpower dispatch industry personnel therefore increasing, & provide their profession & customize service to these needs enterprise. Although the manpower dispatch in domestic is already in fashion for many years, at present in domestic is engaged in the dispatch industry personnel also closely 80,000 people(According to the Council of Labor Affairs Executive Yuan in 2003 estimates, but it estimates the scope also to contain includes the service to contract the jobholders),however, a job dem& the manpower dispatch is often decided by these needs enterprise, confronting positions to dispatched worker, therefor these staff in Employee Dispatching Industry will blend with each othere. The goal of the thesis is to provide a dispatching industry study and analysis of: 1) The job characteristic of the employee dispatching industry. 2) The relations between the job characteristic of the employee dispatching industry and turnover. 3) The effect of the job characteristic and job satisfaction on distpatching industry turnover, and 4) The effect of the job characteristic and job burnout on distpacthing industry turnover. During this study, there are 400copies of the questionnaire were sent out to those staff in employee dispatching industry, 102 were returned. The return rate was 25.5%. From this research, we can conclude that: 1.These staff in Employee Dispatching Industry mostly are university degree, female, single & within 3 years experience in this industry. We think that because female characteristics compare job characteristics. 2.The job characteristics category, resigning intention can be restrained by increasing working autonomy . Skill variety has outst&ingly direct effect on turnover. 3.The job characteristics category, internal satisfaction can be improved by increasing skill variety, task significance & working feedback, but external satisfaction can by improved by increasing working autonomy. 4.Job burnout has mediating effect between the job characteristics & turnover.

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