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The purpose of this paper is to construct a fuzzy logic model that acts as a decision support system to minimize inventory-related costs in the field of industrial…
The purpose of this paper is to construct a fuzzy logic model that acts as a decision support system to minimize inventory-related costs in the field of industrial maintenance. Achieving a balance between the unavailability and over-storage of spare parts is a problem with potentially significant consequences. That significance increases proportionally with the ever-increasing challenge of reducing overall cost. Either scenario can result in substantial financial losses because of the interruption of production or the costs of tied-up capital, also called the “solidification of capital.” Moreover, there is that additional problem of the expiry of parts on the shelf.
The proposed approach relies on inputs from experts with consideration for incompleteness and inaccuracy. Two levels of decision are considered simultaneously. The first is whether a part should be stored or ordered when needed. The second involves comparing suppliers with their batch-size offers based on user-determined criteria. A mathematical model is developed in parallel for validation.
The results indicate that the fuzzy logic approach is accurate and satisfactory for this application and that it is advantageous because of its limited sensitivity to the inaccuracy and/or incompleteness of data. In addition, the approach is practical because it requires minimal user effort.
To the best of the authors’ knowledge, the exploitation of fuzzy-logic altogether with limited sensitivity experts' inputs were never combined for the solution of this particular problem; however, this approach's positive impact is expected to be highly significant in solving a chronic problem in industry.
Features of the maintenance problem are compared to those of the year 2000 (Y2K) problem. Similarities found suggest that lessons learnt from examining each problem can be…
Features of the maintenance problem are compared to those of the year 2000 (Y2K) problem. Similarities found suggest that lessons learnt from examining each problem can be applied to the other. Aspects of responsibility, communication, decision making and prioritisation are investigated. Asserts that further research would identify other useful lessons learned from other disciplines. Considers that using these ready‐made solutions is probably more effective than developing new ones since they have been successfully tried over a long time.
The prevailing discipline in dealing with the Year 2000 computer problem tends to be logistics, which is the main focus of this paper. However, the Year 2000 computing…
The prevailing discipline in dealing with the Year 2000 computer problem tends to be logistics, which is the main focus of this paper. However, the Year 2000 computing problem is considered a multi‐disciplinary problem, as it concerns fields of information systems, maintenance, decision making and crisis and risk management. The millennium problem is increasingly critical yet still it seems there is no systematic and unified approach that considers multiple criteria. The paper analyzes the process of formulating and evaluating an appropriate strategy using multiple criteria decision making (MCDM), based on the analytical hierarchy process (AHP), in order to deal with the millennium problem. The proposed methodology is developed to systematize the decision process. The model used was constructed to provide a generic framework for the formulation of an appropriate millennium problem‐solving strategy. The methodology is described and important issues of consistency and resource allocation, using the knapsack method, are tested.
Continuous improvement strategies are of increasing importance but difficult to establish and sustain. This paper uses multiple criteria decision‐making (MCDM), based on…
Continuous improvement strategies are of increasing importance but difficult to establish and sustain. This paper uses multiple criteria decision‐making (MCDM), based on the analytical hierarchy process (AHP), as a means of systematising the decision process underlying strategy determination. A generic framework is developed to formulate an ideal strategy for a continuous improvement process (CIP) using AHP. The paper also discusses issues relating to consistency and sensitivity analysis.
Reviews two selected papers: “Circle of risk”, and “Time runs out”. Bases the selection of papers on several factors. The first paper on circles of risk, is quite relevant…
Reviews two selected papers: “Circle of risk”, and “Time runs out”. Bases the selection of papers on several factors. The first paper on circles of risk, is quite relevant to the main theme of this issue, that is risk and crisis management. It offers a new modelling approach that could affect our perception of the extent of the millennium problem. The second paper summarises the state of the art related to the millennium problem from a global economic point of view. Criticism is embedded within the context of the summary of each paper.
High-reliability performance and high-hazard are intertwined in High-Reliability Organizations (HROs) operations; these organizations are highly safe, highly hazardous and…
High-reliability performance and high-hazard are intertwined in High-Reliability Organizations (HROs) operations; these organizations are highly safe, highly hazardous and highly significant for the modern society, not only for the valuable resources they have, but also the indispensable services they provide. This research intend to understand how HROs could produce high quality performance despite their challenging and demanding contexts. The research followed an emic approach to develop an organizational framework that reflects the contribution of the seeming traits of the organizations to the operations safety based on the workers point of views about the safety of workstations.
This research adopted mixed methods of in-depth interviews and literature review to identify the structural characteristics of high-reliability organizations (HROs) embedded in the organizations studies and developed a theoretical based structural framework for HROs. Furthermore, a systemic literature review was adopted to find the evidence from the organizations literature for the identified characteristics from the interviews from the first stage. The setting for this study is six Chinese power stations, four stations in Hubei province central China and two stations in the southern China Guangdong province.
The organizational framework is a key determinant to achieve high-reliability performance; however, solely it cannot explain how HROs manage the risks of hazard events and operate safely in high-hazard environments. High-reliability performance is attributed to the interaction between two sets of determinants of safety and hazard. The findings of this research indicate that HROs systems would be described as reliable or hazardous depending on the tightly coupled setting, complexity, bureaucracy involvement and dynamicity within the systems from one hand, and safety orientation, failure intolerance, systemwide processing, the institutional setting and the employment of redundant systems on other hand.
The authors developed an organizational framework of organizing the safety work in HROs. The applied method of interviewing and literature review was not adopted in any other researches.
Addresses problems with the practical implementation of total productive maintenance (TPM), and presents a rather appropriate approach to TPM implementation. This approach…
Addresses problems with the practical implementation of total productive maintenance (TPM), and presents a rather appropriate approach to TPM implementation. This approach is termed by the author as appropriate productive maintenance (APM). The APM concept offers a rigorous methodology that utilises several tools to achieve a world‐class manufacturing (WCM) status. A modelling tool, called IDEFO, is used to map the whole process. Presents a nine‐step framework for formulating the APM programme. Concludes that the integration of operational tools can contribute towards developing a strategic world class maintenance programme. Describes a computerised maintenance system, developed at a company in the automotive sector in the UK, as a practical example of the issues presented.
Competitiveness has forced companies to improve the overall performance of the business. In the area of maintenance, much has been written about strategies, such as total…
Competitiveness has forced companies to improve the overall performance of the business. In the area of maintenance, much has been written about strategies, such as total productive maintenance or reliability centred maintenance, in order to increase the reliability and therefore capacity of the industrial plants in their quest for world‐class maintenance. However, if a strategy is to be effective, it must be supported with an invaluable resource, information. In the present work, the role of computerised maintenance management systems (CMMSs) is discussed as a powerful tool necessary for obtaining information from raw data and support the decision‐making process. Furthermore, a CMMS has been designed, developed, customised and implemented for a disc brake pad manufacturing company based in England. In addition, a maintenance maturity grid has been proposed to support the CMMS implementation. The grid shows that the complexity of the CMMS will increase as the maintenance function moves from a reactive to a proactive culture. The implemented CMMS aims to reduce total downtime and frequency of failures of the machines by improving the efficiency and effectiveness of the maintenance force. The computer program simplifies and reduces the time of data capture compared to the currently used paper‐based reporting system. It also provides the maintenance planners with a platform for decision analysis and support often ignored in the commercial CMMSs available in the market.
In this paper, an investigation of the characteristics of computerised maintenance management systems (CMMSs) is carried out to highlight the need for them in industry and…
In this paper, an investigation of the characteristics of computerised maintenance management systems (CMMSs) is carried out to highlight the need for them in industry and identify their current deficiencies. A proposed model provides a decision analysis capability that is often missing in existing CMMSs. The proposed model employs a hybrid of intelligent approaches. This hybrid system is analogous to the Holonic concept. The distinction between these two features is important. The rules function automatically. Practical implications. The main practical implication of this paper is the proposal of an intelligent model that can be linked to CMMSs to add value to data collected in the form of provision of decision support capabilities. A further implication is to identify the need for information to aid maintenance, followed by the provision of reasons for current deficiencies in existing off‐the‐shelf CMMSs.
This paper describes industrial research in which the implementation of a computerised maintenace management system (CMMS) was used as an effective tool that supports…
This paper describes industrial research in which the implementation of a computerised maintenace management system (CMMS) was used as an effective tool that supports decision making with the objective of acheiving world‐class manufacturing status. Breakdown trends and performance levels were analysed in a continuous improvement environment. Critical performance measures were then identified and these became the driving force for specific benchmarking metrics and improvement techniques which enabled approaches to eliminate breakdown losses to be formulated. Data collected were analysed using a multiple criteria decision making (MCDM) methodology and the MCDM technique was implemented into the software in order to add value to the data. This gave increased support to decision making and enabled appropriate maintenance strategies to be implemented.