Global ETD Search
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 28 for “"maintenance scheduling"”.
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Optimisation of heat exchanger network maintenance scheduling problems
… focuses on the challenges that arise from the scheduling of heat exchanger network maintenance problems which undergo fouling and run continuously over time. The original contributions of the current research consist of the development of novel optimisation methodologies for the scheduling of …
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Maintenance scheduling for modular systems-models and algorithms
Maintenance scheduling is an integral part of many complex systems. For instance, without effective maintenance scheduling, the combined effects of preventative and corrective maintenance can have severe impacts on the availability of those systems. Based on current Air Force trends including …
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City-scale eco-routing and pavement eco-maintenance scheduling for CO2 mitigation
… model is built and utilised in testing pavement maintenance scenarios. San Francisco is chosen as the case study area due to the availability of various traffic mobility and infrastructure condition data. In Chapter 3 of the thesis, the traffic simulation module is developed that implements the …
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Preventive maintenance scheduling based on failure data in a medical device manufacturing facility
… 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 to the …
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Optimal control methodologies for the optimisation of maintenance scheduling and production in processes using decaying catalysts
… solving problems involving the optimisation of maintenance scheduling and production in processes using decaying catalysts. Previously, such problems were solved using a category of methods which involve making decisions of discrete as well as continuous nature, called mixed-integer optimisation …
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An approach for structural maintenance scheduling using time variant reliability analysis of serviceability and ultimate strength models
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2002.
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Optimal scheduling of fighter aircraft maintenance
The effective scheduling of fighter aircraft maintenance in the Air Force is crucial to overall mission accomplishment. An effective maintenance scheduling policy maximizes the use of maintenance resources and aircraft availability. Currently, maintenance scheduling is a time consuming process that …
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Optimal Scheduling of Power Plant Maintenance with Gas Portfolio
Power plant maintenance scheduling aims at defining the sequence of preventive maintenance outages of each unit over the planning time horizon so that the overall costs are minimized and all the constraints are satisfied. Optimization in maintenance scheduling could reduce greenhouse gases and help …
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Best practices in aircraft engine MRO : a study of commercial and military systems
Maintenance, repair and overhaul (MRO) is a key activity in the lifecycle of an aircraft and its engines. Because of the typically long operational lifetimes expected from these costly assets, MRO is necessary to maintain these systems in a safe and functional condition, so that they can fulfill …
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Software agents : an application to the airline MRO industry
… of aircraft spare parts, human-related maintenance errors and the lack of coordinated decision-making in maintenance scheduling are some of the problems plaguing the airline MRO industry. Airlines, independent MRO providers and government agencies, particularly the Federal Aviation …
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SCHEDULING OF PAVEMENT MAINTENANCE ACTIVITIES
The focus of this study is on the optimal scheduling of pavement maintenance activities to reduce traffic delays at the network level using genetic algorithms. This thesis develops a new method of pavement maintenance scheduling at the road network level. Pavement maintenance management involves …
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Development of machine-vision technology for inspection of railroad track
… for defect growth trending and predictive maintenance scheduling. Ultimately, this system will provide consistent, quantitative track inspection data for not only increasing current inspection capabilities, but also deepening the understanding of track health over time.
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Variable selection for wind turbine condition monitoring and fault detection system
… as the most viable solution, which enhances maintenance scheduling and achieving a more reliable system. However, for an effective CMS, large number of sensors and high sampling frequency are required, resulting in a large amount of data to be generated. This has become a burden for the CMS …
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Data-driven models for reliability prognostics of gas turbines
… conditions; iii) downtimes due to scheduled maintenance and inspection events. These sources naturally lead to dynamics, where random (resp. forced) transitions occur due to switching in the operating mode (resp. trip and/or maintenance events). The degradation of the rotor is modeled by …
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Live Load Testing of Appalachia, Va Concrete Arch Bridges for Load Rating Recommendation
… bridges to aid in the process of load rating and maintenance scheduling for the two bridges.
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Predictive maintenance for industry 4.0, a holistic approach to performing predictive maintenance as a service.
… machines are complex and can only work in good maintenance conditions. Any failure of this equipment and related tools can easily lead to unintended disruption. Due to the collaborative nature of the manufacturing systems, one machine failure could result in undesired downtimes beyond single …
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University of Washington/Seattle Cancer Care Alliance Experience with Single Agent Ipilimumab in Advanced Unresectable/Metastatic Melanoma
… either the investigational 10 mg/kg dose (with maintenance scheduling) or the 3 mg/kg dose (without maintenance, similar to the FDA approveddose). Efficacy and safety outcomes and baseline characteristics were subjected to univariate analysis. Efficacy endpoints included overall survival (OS), …
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Optimal control reformulation for the solution of decision-making problems in chemical engineering
… Second, the Reverse Osmosis (RO) cleaning maintenance scheduling problem is examined. It is shown that the proposed framework can solve successfully this type of problem, even for large-scale configurations, long time horizons and arbitrary realistic model complexity of the underlying …
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Naval Submarine Maintenance: An Examination of Areas of Potential Availability Execution Risk
… trickled down to affect the nuclear submarine maintenance enterprise. Despite the recognition of that strain, problems continue to persist that are yielding significant ramifications on overall submarine fleet readiness. The urgency to consistently complete maintenance availabilities on time in …
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New approaches for integrating revenue and supply chain management
… well as in inventory management, logistics, and maintenance scheduling. In this problem, there are multiple item types that each has a given time-dependent sequence of demands that need to satisfied. Every time an order of item types is placed, there is an associated fixed setup cost that is …
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