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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 65 for “"Preventive Maintenance"”.
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Preventive Maintenance for a Multi-task System
This research models the behavior of a multi-task system with respect to time. The type of multi-task system considered here is one in which not all system components are required to perform each task. Each component may, however, be used for more than one task. Also, it is possible that some of …
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Reducing reagent waste through process improvement and preventive maintenance
… understand mechanical errors, I observed routine maintenance at four sites and found that business units did not consistently share best practices. Collaborating with vendor representatives and operators, I launched an Autonomous Maintenance (AM) pilot program in order to develop training …
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Component availability for an age replacement preventive maintenance policy
… which is maintained by an age replacement preventive maintenance policy. The availability function, A(t), is a function of time and is defined as the probability that the component functions at time t. The component is considered to have two states: operating and failed. In this policy, the …
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An algorithm for a two-phase strategy for preventive maintenance
… research was to develop a two-phase strategy for preventive maintenance and the critical number of units. Maintenance is done if the number of failures is equal to or greater than the critical number of units. The system under consideration had q components. The system failed when k (k < q) …
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The Economy of Preventive Maintenance of Concrete Bridges Due to Corrosion
… practice for physical evaluation and delayed maintenance of deteriorated concrete bridge is fundamentally wrong. This research presents a new approach for the evaluation of the condition states of steel reinforced concrete bridge members, which is based on their chemical conditions instead of …
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District Level Preventive Maintenance Treatment Selection Tool for Use in Virginia
Preventive maintenance has the potential to improve network condition by retarding future pavement deterioration. The Virginia Department of Transportation uses its pavement management system to determine maintenance targets for each district. The districts then use these recommendations to select …
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Preventive maintenance scheduling based on failure data in a medical device manufacturing facility
… S barrel molds for the purpose of predicting preventive maintenance (PM) schedule. Pareto Rule was utilized to filter out the defect-types that are causing 80% of the defect occurrences. Defect density was introduced, i.e. the ratio between total number of defects occurred per cavity position …
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Availability Analysis for the Quasi-Renewal Process with an Age-Dependent Preventive Maintenance Policy
… can also be used to model the increasing time of maintenance actions due to the increasing difficulty of maintaining an aging system by setting the parameter to a value larger than 1. We construct a model where the operating times follow a quasi-renewal process and the corrective/preventive …
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Integrating SMED, preventive maintenance, and standardized work practices: a study of productivity gains in metalworking SMEs
… sector with the use of tools such as Preventive Maintenance, SMED (Rapid Tool Change) and Standardized Work. The motivation behind this approach arises from the identification of problems related to productivity in production processes, specifically in relation to rework times, machine …
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On The Maintenance Modeling and Optimization of Repairable Systems: Two Different Scenarios
… we study two different scenarios on the maintenance modeling and optimization of repairable systems. First, we study the long-run availability of a traditional repairable system that is subjected to imperfect corrective maintenance. We use Kijima's second virtual age model to describe the …
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Assessment of Dynamic Maintenance Management
… which can directly affect human lives. The maintenance system plays an important role in achieving higher performance targets. In order to manage maintenance activities in more informed and rational manner, it is very important to understand the inherently complex and dynamic structure of …
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Incorporating station related maintenance and aging outages in composite system reliability evaluation
… removed from service in order to conduct preventive maintenance. The removal of equipment for maintenance creates a change in the station configuration and a more vulnerable system. The failure of a related major component during a station preventive maintenance outage can result in a …
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Reducing variability in equipment availability at Intel using systems optimization
… tool availability by planning for usage-driven preventive maintenance. A method and associated tools are proposed and investigated in the context of the Thin Films area in Intel's Hudson facility. The solution we propose incorporates the following characteristics: Drives towards a balanced …
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Modelling and simulation for the joint optimisation of inspection maintenance and spare parts inventory in multi-line production settings
… is developed to model the joint optimisation of preventive maintenance and spare parts inventory in multi-line settings. The multi-line machines are subject to failure, based on the delay-time concept, and a selection of policies are used for the replenishment of the machines’ critical component. …
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Heuristic rules to achieve pavement performance profile objectives
Most highway agencies adopt either a preventive or corrective maintenance strategy for pavement maintenance programming. Preventive maintenance is carried out when the segment distress value is below their respective warning level for defects whereas corrective maintenance is done when the segment …
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Mejora del proceso de abastecimiento del taller de mecánica automotriz autoservicios Untiveros S. A. C.
… company called Mighty to supply auto-parts to preventive maintenance. The issue mainly is no count with suitable purchase process for auto parts to preventive maintenance, it causes break of stock it reduces effectiveness and efficiency level. The research techniques were observation (visits to …
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Multi-objective system optimisation with respect to availability, maintainability and cost
… dependability is by designing the system with preventive maintenance (PM) in mind. A well articulated PM policy can reduce the occurrence of system failure, thereby improving dependability attributes such as safety, reliability and availability as well as cost.In a typical scenario, components …
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Impact of Lot Dedication on the Performance of the Fab
… lot dedication scheme performs the best under no preventive maintenance/breakdown case while, for the deterministic value of unscheduled breakdown times and preventive maintenance schedule used, 1-level lot dedication performed the best. Even though the 3-level lot dedication scheme is more …
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Exploring the Relationship between Environmental Operations and Supply Chain Practices, Complementary Assets, and Performance
… and operational performance. In contrast, preventive maintenance and volume and worker flexibility were found to only moderate environmental practices and environmental performance. Only quality practices were found to moderate both environmental supply chain practices and operational …
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