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To recognize different bearing fault patterns under different operating conditions, a novel multi-team competitive optimization (MTCO) algorithm is proposed. The algorithm is inspired by the competitive behaviors among multiple teams. In the structure, it consists of a three-level optimization organization structure, so that the more potential optimal areas can be searched. Meanwhile, some new strategies...
To better describe the reality that repaired systems are neither in “as good as new” nor “as bad as old” conditions, many imperfect maintenance models have been developed in the past decades to mathematically characterize the maintenance quality from various points of view. However, without complete knowing the potential physics of failures and the mechanism of improvement from repair, but only with...
In this paper, we generalize a multi-state element (MSE) replacement optimization problem to multi-state systems (MSS), in which a global optimal MSE replacement policy is obtained to achieve better outcome than local optimal MSE replacement strategy which does not consider the system performance rate dependency. It can be also concluded from the illustrative case of a power station coal transportation...
Life cycle cost is the total cost incurred in the life cycle of a product, including design, development, production, operation, maintenance, support and disposal. Life cycle cost analysis can help engineers to identify equipment and process selection not on the initial purchase cost but rather on the total cost. A reasonable life cycle cost model can lead to a reliable design. In this paper, several...
For the management of a software development project, a software quality prediction model is very helpful since it can provide the management with useful information needed for decision-makings. Many software quality prediction models and techniques have been proposed and studied in the literature. Nevertheless, the complicated situations of software development process call for a more flexible model...
Warranty obligations in product service involve additional costs to the manufacturers. Building diagnostic features into a product can reduce the warranty costs because of; 1) fewer visits needed by warranty service representatives (through self-guided user repairs for simple problems) and 2) shorter service times (via reduced diagnostic time) for each failure. However, this approach increases the...
The success of a new product depends on both engineering decision (product reliability) and marketing decisions (price, warranty). Better reliability results in higher manufacturing cost and higher sale price. Consumers are willing to pay a higher price only if they have assurance about product reliability. Product warranty is one such tool to signal reliability with longer warranty period indicating...
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