Mathematical modeling of the operation processes automotive engine oils allows to optimize time their use during operation. A certain significance for changing qualitative properties motor is introduced by such an operational indicator as „waste” oil consumption. The article describes causes and parameters consumption, well mathematical model changes in physico-chemical one that will allow us p...

In this paper, we investigate two dimensional leased contracts for a dump truck operated in a mining industry. To keep the truck in a good operational condition, an imperfect preventive maintenance (PM) policy is applied. When the truck fails then corrective maintenance (CM) is done. PM and/or CM can be leased to an external agent or a lessor for an economic reason. The situation under study is...

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 ...

ccess to an offshore wind turbine is greatly limited by the environment; consequently operation and maintenance (O&M) can become more sporadic and infrequent. This reduces the turbine availability, thus decreasing the generated output [1]. O&M is already a large part of the life costs of a turbine, but with offshore turbines, this will increase greatly with the inclusion of vessel hire costs [2...

This paper deals with the problem of integrating noncyclical preventive maintenance and tactical production planning for a single machine. We are given a set of products that must be produced in lots during a specified finite planning horizon. The maintenance policy suggests possible preventive replacements at the beginning of each production planning period, and minimal repair at machine failu...

The role of visual information and action representations in executing a motor task was examined from a mental representations approach. High-skill (n = 20) and low-skill (n = 20) soccer players performed a passing task to two targets at distances of 9.14 and 18.29 m, under three visual conditions: normal, occluded, and distorted vision (i.e., +4.0 corrective lenses, a visual acuity of approxim...

Productivity is a key weapon for manufacturing companies to stay competitive in a continuous growing global market. Increased productivity can be achieved through increased availability. This has directed focus on different maintenance types and maintenance strategies. Increased availability through efficient maintenance can be achieved through less corrective maintenance actions and more accur...

In this paper, the maintenance optimization problem of multi-component system is considered. It assumed that exact cause failure might be masked. That is, unknown, and we only know it belongs to a set called mask set. Both opportunistic perfect preventive (OPPM) corrective are Threshold OPPM inter-inspection interval considered as decision parameters which optimized using long-run cost rate cri...