Optimization Model Of Maintenance Planning And Auto-Evaluation Process To MRO Enterprise

The dissertation concerns with models and algorithms for various fuzzy aggregate maintenance planning . The major works are given as follows:(1) First, presents a systematic methodology to construct a reliability prediction model for aircraft reliability based on spare parts invalidation data. SOM is used to combine the analytic the scatter spare parts invalidation data into a sequence model based on the time-to-failure data extracted from the repair registers. Its effectiveness is illustrated by Mean Time Between Failures (MTBF) study and analysis of real invalidation data. The proposed method can help proactively diagnose spare parts faults with a sufficient lead time before actual system failures to allow preventive maintenance to be scheduled thereby reducing the downtime costs.(2)Secondly, a hierarchy model is established about the evaluation of servicing process. When the model is analyzed by analytical hierarchy process (AHP), the weighted coefficients influencing the evaluation and selection process are obtained, and the evaluation matrix is establish by data envelopment analysis (DEA). The hierarchy structure model is implemented based on .NET, the simulation credibility of this method is proved validity.(3)Then, considered strong seasonal characteristics of the aviation maintenance market, aircraft maintenance planning model with fuzzy demand and production capacity constraints was proposed through analyzing the aircraft maintenance process for the airline, spare parts requirement and airline flights planning. Under the background of aircraft maintenance enterprises, the model and algorithm on maintenance planning for the decision-making system in uncertainty environment were put forward. Based on theories of fuzzy math and probability , maintenance planning and control model was designed to establish a reconfigurable optimized maintenance planning.(4) A solution based on .NET Framework and Web Services technology is presented,which illuminates how to construct the spare parts order and repair system for the exigent requirements of airline company after the analysis and discussion of business requirements and .NET architecture. By the full use of Service-Oriented Architecture(SOA) and Role-based Control(RBAC),the solution makes the supply chain more fluent inside the airline company.