Papers by Keyword: Maintenance Interval

Abstract: Lack of preventive measure is currently the problem that implicates poor maintenance outcome. Scheduled maintenance is claimed as a maintenance strategy to tackle the problem. However, the effectiveness of scheduled maintenance can be greatly influenced by the length of predetermined maintenance interval. Thus, this paper aims to study the relationship between length of predetermined maintenance interval and maintenance performance. The literature review identifies the length of predetermined maintenance interval as an importance characteristic of scheduled maintenance strategy. A quantitative approach is adopted and carried out through questionnaire survey. Subsequently, descriptive analysis and correlation analysis are used to analyse the collected data. Then, research result demonstrates that the length of predetermined maintenance interval is significantly correlated to the maintenance performance. The length of predetermined maintenance interval must be considered in maintenance planning and execution. The research recommends continuous monitoring or regular inspection of building systems and components to identify their condition and update the length of predetermined maintenance interval regularly. Consequently, the effective maintenance execution helps to avoid systems failure occurs and optimises maintenance performance.

Abstract: Properly performed preventive maintenance is one of the basic conditions for ensuring the operability of the mobile machines. The authors proposed new method of using the modern technology of Global Positioning System and General Packet Radio Services, in order to make proper maintenance decision making and furthermore to reduce costs of preventive maintenance.

Abstract: The unavailability equations of several aging scenarios of standby safety component are derived and the risk of standby safety system is quantified. The different maintenance strategies are adopted for no aging scenario and several aging scenarios respectively. The two kind of test and maintenance (T&M) policies are adopted for no aging scenario and several aging scenarios. A numerical example is introduced for the illustration. The system unavailabilities under different configurations of parallel safety system and T&M policies are computed and compared. It can be derived that the combination of different T&M policies and configurations is significant effect on the risk of standby safety system and optimal STI and T&M interval.

Abstract: The maintenance tasks in present studies for the maintenance optimization of multi-component systems are mostly simplex, while the compound maintenance that integrates several kinds of maintenance types existing in practice are seldom studied. To optimize the compound maintenance intervals of multi-component systems, the group maintenance strategy was introduced in this paper, the maintenance cost structure and composition were analyzed from system point of view, and the mathematical models were established for expected maintenance cost per unit time. Finally, a numerical example was illustrated to prove the validity of the strategy and models above.