Steel bridges that are under severe chloride exposure due to deicing salts or marine environmental effects require frequent maintenance and repair activities to extend their service life and maintain an adequate performance level. In addition to the direct maintenance cost, these maintenance actions may lead to indirect costs associated with traffic delays and environmental effects that can sig...

Nowadays, multiple constraints imposed by economical, social and environmental considerations undergo maintenance planning optimization into a major challenge to designers, owners and users of infrastructure. This study presents a simplified methodology to evaluate the sustainability of maintenance strategies used in reinforced concrete structures exposed to chlorides. The proposed approach is ...

This paper presents an original software tool based on a model of expert system that has been developed to satisfy the requirements of fault diagnosis, repair and maintenance of electrical machines in industrial, educational or other applications. This software comprises an SQL server database and provides different user levels (simple user, power user and administrator). By the introduction of...

The high reliability of modern engineering systems is achieved by performing predictive maintenance. Mathematical models based on stochastic timed colored Petri nets are an effective tool for developing complex production processes Industry 4.0. This article discusses the maintainability evaluation used in hierarchical net models. simulation model was built using nets, and constructed with four...

This work has two important goals. The first one is to present a novel methodology for preventive maintenance policy evaluation based upon a cost-reliability model, which allows the use of flexible intervals between maintenance interventions. Such innovative features represents an advantage over the traditional methodologies as it allows a continuous fitting of the schedules in order to better ...

Maintenance activities are crucial for all manufacturing industries. To ensure availability and lifetime of production equipment, operations management logistics support maintenance need to evolve year after year. Besides, Centralised Workshops one the most interesting approaches reduce cost time required repair faulty equipment. Generally known in research community as ‘repair shops’, they aim...

ophthalmic equipment, including surgical instruments and diagnostic devices, can be compared to the maintenance of a motor vehicle, something many of us understand well. If you had a car, would you drive it until the fuel runs out or until a tyre punctures, and then abandon it to buy a new car? Of course not. However, many eye care units purchase (or receive as a donation) expensive and delicat...