Concept Of Production System Research Articles

Production System Changes in the Korean Consumer Electronics Sector

ABSTRACT:This paper establishes the concept of production system as an analytical framework to embrace recent industrial changes. Five dimensions of production system changes are posited. A case study of the Korean consumer electronics sector shows that the companies have experienced diverse patterns of changes, but these changes are generally related to plant location, ownership, export orientation, and company size.

Modular production system concept for a water tap assembly

An idea for a modular and flexible water tap assembly system is presented. In the assembly system there are modular independent workstations with local, distributed control. Flexibility is due to modularity, reconfigurability and expandability. The modular approach makes it easy to adjust for changes in production.

Environmental Control of a Single-cluster Greenhouse Tomato Crop

In this paper we review our research of light effects on tomato production. It was demonstrated that, during the production of greenhouse tomatoes, the total fruit yield, as well as time of harvest, was related to light. The date of harvest was inversely correlated with the amount of light the crop received during the seedling phase of growth, while fruit weight was positively correlated with light during the production phase. Additionally, we present information that shows that light was most effective in promoting fruit development between 15 and 45 days after flowering. Some of these relationships were quantified and used to develop a predictive model to help a grower plan a tomato crop to meet market demand. The concept of the Single-cluster Tomato Production System was developed, and the rewards of using our understanding of plant-environment interactions to control plant growth and, therefore maxim&profits were shown. Furthermore, the need to create a more dynamic model and the methods for doing so were discussed.

Flexibility, hierarchy and regional development: The changing structure of industrial production systems and their forms of governance in the 1990s

This paper develops the concept of production system for understanding and comparing some of the success stories of regional development in recent years, and for comparing their developmental tendencies. The production system has an input-output structure (a set of units of production of different sizes linked together), a structure of governance (authority and power) and a territoriality (whether it is dispersed or territorially concentrated).

Development of flexible production systems for strip mining

Since the inception of the concept of flexible production systems (FPS) in the early nineteen sixties, FPS have been applied successfully to manufacturing, and, of late, to construction as well. As the mining production process exhibits some similarities to both manufacturing and construction, it is appropriate to consider the applications of FPS to strip mining with the objective of deriving the same process benefits as have already been obtained in manufacturing. The concepts of flexibility as understood in manufacturing are introduced and particular concepts for flexible strip mining systems (FSMS) are developed. The paper shows how FSMS can be applied and realized. The organizational and managerial prerequisites for such applications are discussed. A knowledge base for the consequent development of flexible strip mining is prepared and the application of current FMS planning and design concepts to strip mining is described. The paper concludes with the statement that FSMS is a viable new technology approach to the planning, design and equipment allocation in strip coal mines. Though the degree of flexibility is considerably lower in strip mining than in construction or manufacturing, strip mining can still be analyzed within the FPS framework. There is a potential for successful application of FPS in strip mining, especially in larger, more diverse mines.

Review and appraisal of concept of sustainable food production systems

Environmental degradation, competition for resources, increasing food demands, and the integration of agriculture into the international economy threaten the sustainability of many food production systems. Despite these concerns, the concept of sustainable food production systems remains unclear, and recent attempts to appraise sustainability have been hampered by conceptual inconsistencies and the absence of workable definitions. Six perspectives are shown to underpin the concept. Environmental accounting identifies biophysical limits for agriculture. Sustained yield refers to output levels that can be maintained continuously. Carrying capacity defines maximum population levels that can be supported in perpetuity. Production unit viability refers to the capacity of primary producers to remain in agriculture. Product supply and security focuses on the adequacy of food supplies. Equity is concerned with the spatial and temporal distribution of products dervied from resource use. Many studies into sustainable agriculture cover more than one of these perspectives, indicating the concept is complex and embraces issues relating to the biophysical, social, and economic environments. Clarification of the concept would facilitate the development of frameworks and analytical systems for appraising the sustainability of food production systems.

Statistical precision and robustness of the AMSAA continuous reliability growth estimators : Tariq Ziad and Paul M. Ellner. Proc. A. Reliab. Maintainab. Symp., 210 (1990)

This study proposes the concept of subsea production systems with a seabed storage tank to provide an alternative to conventional floating facilities and performs the reliability, maintainability and availability study for the seabed storage tank. The reliability assessment of the seabed storage tank performs a four-step procedure. A four-step procedure is to define the system boundary, collect the reliability data, construct a fault tree and estimate the reliability. The failure and repair data are obtained from the component of the lowest level of the seabed storage tank because the seabed storage tank is a new system unknown reliability data. Reliability of the seabed storage tank is estimated with a consideration of critical events. The total failure frequency of the SST is estimated approximately 2.27· 10−4/hour. The maintainability analysis is estimated in accordance with MIL-HDBK 472 Procedure V. The elements of repair time is obtained from the subsea JIP 2000 and RAM study of field data. Active repair time from OREDA 2009 is regarded as the repair/replace of repair time elements. The total repair time is mainly effected by the preparation time of repair time elements. The system availability for the seabed storage tank under normal operation is calculated as approximately 91.8%.

Knowledge-based system for rapid prototyping

In recent years it has been noticed that rapid prototyping produces better software products. Research on combining Artificial Intelligence and software engineering has also been conducted for a number of years. A knowledge-based system for rapid prototyping is presented. In the system, the Frame-and-Rule Oriented Requirements Language and a methodology are developed to provide an integrated means of prototyping throughoyt the software life cycle. The particular application domain to be modelled is represented in terms of objects and activities. FRORL, which uses the concept of frames and production systems, describes the problem domain's objects and activities in a natural way. With the support of a knowledge base, a software prototype can be rapidly developed using FRORL. The system has been implemented using Prolog on a VAX-11/780 computer.

Application of Production Systems Analysis to Determine Completion Sensitivity on Gas Well Production

A completely new approach is presented to show the effect of completion parameters on high volume gas wells typical of the Gulf Coast. The solution can be summarized in graphical form and it will consider the following sections of the total producing system: 1) flow in the porous media, 2) effect of completion, and 3) flow conduit performance. The result is that the controlling parameter in the total production system can be determined. Many wells are capable of producing very high rates but are restricted due to very restricted gravel pack parameters, while wells with very efficient gravel pack completions are tubing-dominated. The procedure presented approaches the completion sensitivity analysis from a complete production system concept.

An Electric Industrial Robot—‘Motoman’

Yaskawa developed a new and unique motor‐operated handling equipment “Motohand®” which is used in various fields of industries. Today more than 300 sets are operating in actual production lines. According to the development of automation concept and tools, the main theme becomes the automation of the sophisticated operations with flexibility. The sophisticated operations mean: • handling in the integrated manufacturing, • operation caused by variation of work type, • operation which depends upon experiences of the operator, • and so forth. The unfavorable work is also one of the main themes which much worries operators. At this step the new concept of production system and tools for these requirements must be developed. Here, in this paper, an industrial robot “Motoman®” is introduced as one of the new automation tools. The robot “Motoman®” consists of: • 5 degrees of freedom with electric digital servo drive, a 16‐bit microcomputer, 5 degrees of freedom make it possible to reach any point in the operation space and to set any posture. The microcomputer, organically connected to the robot mechanism, makes it very simple to make operation program in both teach‐in play‐back and programmed sequencial operation. Using the robot with know‐how and specification of the respective application, we can enlarge the horizon of automation and challenge to release human from the unfavorable work.

New Developments for the Offshore Oil Industry

More than a decade ago, oil drillers and naval architects started to use vessels instead of fixed structures for offshore drilling. A multitude of novel platform concepts were developed which allowed the tremendous spreading of offshore oil activities. Today, search for oil spreads into areas of greater depth and farther away from the shores. This requires new developments of technology over a broad spectrum. The latest concepts of underwater oil production systems are briefly described.