Prof. dr. ir. Tiedo Tinga is presently chairing the Dynamics based Maintenance group at the University of Twente and is also associate professor Maintenance Technology at the Netherlands Defence Academy. He is leading research programs at both institutes on predictive maintenance, reliability engineering and maintenance optimization. Prior to joining the universities, he has been working as a s...

An effective warranty servicing strategy should be made considering both warranty cost and product availability. Based on the two-dimensional free repair warranty, a strategy combining the imperfect preventive maintenance and minimal repair is proposed where the imperfect preventive maintenances are implemented in a special subregion of the warranty and all other failures are repaired minimally...

In this article we give an overview of the literature on multi-component maintenance optimization. We focus on work appearing since the 1991 survey A survey of maintenance models for multi-unit systems by Cho and Parlar (1991). This paper builds forth on the review article by Dekker et al. (1996), which focusses on economic dependence, and the survey of maintenance policies by Wang (2002), in w...

Opportunistic maintenance has been an essential part of all systems-maintenance, implicitly if not explicitly. However, as systems become more expensive and complex, the decisions involving opportunistic maintenance activities become more complicated. In this paper, we discuss a few issues that arise while carrying out the opportunistic maintenance, and try to resolve them with the help of a po...

We introduce FORM 4.2, a new minor release of the symbolic manipulation toolkit. We demonstrate several new features, such as a new pattern matching option, new output optimization, and automatic expansion of rational functions.

An application of a combination of scheduling theory, simulation modelling and combinatorial optimization is presented. The system under study deals with human resource and assets management to perform maintenance in large support networks. The paper includes the development of the framework of the software tool that will be embedded into the commercial maintenance package called INGRID. Follow...

This paper proposes a condition-based maintenance approach for availability optimization problem. The system to be maintained is subject to stochastic degradations and assumed to be continuously monitored. Imperfect preventive maintenance actions are made on the basis of the hybrid hazard model and the condition to perform a preventive maintenance corresponds to a system reliability threshold. ...

This paper presents a hybrid particle swarm optimization based genetic algorithm and hybrid particle swarm optimization based evolutionary programming for solving long-term generation maintenance scheduling problem. In power system, maintenance scheduling is being done upon the technical requirements of power plants and preserving the grid reliability. The objective function is to sell electric...

This paper deals with optimal control interval determination using minimization the financial costs. It clears conceptual, mathematical and simulation model of the problem solution. It enumerates and evaluates results of the simulation.