Software maintenance involves different categories of activities: corrective, adaptive, perfective, and preventive. However, research regarding these distinct activities is hampered by lack of empirical data that is labeled to identify the type of maintenance being performed. A promising dataset is provided by the more than 800 versions of the Linux kernel that have been released since 1994. Th...

introduction: in health care services, preventing problems and failures is more efficient than concentrating on correcting them. repairs are always expensive, as they require highly specialized personnel and costly spare parts. regular inspecting and servicing, using manual services and checklists, would maximize the impact of maintenance and minimize the costs. it is thus important to introduc...

Equipment failure and production shortfalls can cause significant impacts on companies. Preventive maintenance potentially increase equipment reliability availability, helping companies achieve their corporate goals while reducing operation costs. However, determining the optimal interval between interventions involves balancing various factors such as costs, risk of failures, need for correcti...

Efficient and on-time maintenance plays a crucial role inreducing cost and increasing the market share of an industrial unit. Preventivemaintenance is a broad term that encompasses a set of activitiesaimed at improving the overall reliability and availability of a systembefore machinery breakdown. The previous studies have addressed thescheduling of preventive maintenance. These studies have co...

In this paper two similar models for the maintenance of a production-inventory system are considered. In both models, an input generating installation supplies a buffer with a raw material and a production unit pulls the raw material from the buffer. The installation in the first model and the production unit in the second model deteriorate stochastically over time and the problem of their opti...

Health Care Organizations are large consumers of energy resources. This is due to the large number of services they must offer continuously, the strict requirements of temperature and humidity for patients and comfort for all visitors. Facilities for thermal energy production are critical as they guarantee the proper working of care services by producing primary air, eliminating legionella, and...