This paper considers a competing risk (degradation and sudden failure) maintenance situation. A maintenance model and a repair cost model are presented. The degradation state of the units is continuously monitored. When either the degradation level reaches a predetermined threshold or a sudden...

In recent years, many companies have come to recognize the crucial role that purchasing and materials management activities play in determining overall corporate performance. Of main concern in many companies is the supplier development program. To examine the role of supplier development in the...

In experiments with mixtures that involve process variables, if the response function is expressed as the sum of a function of mixture components and a function of process variables, then the parameters in the mixture part and in the process part can be estimated independently using orthogonal...

This paper presents a novel method of multi-objective optimization by learning automata (MOLA) to solve complex multi-objective optimization problems. MOLA consists of multiple automata which perform sequential search in the solution domain. Each automaton undertakes dimensional search in the...

For developing countries with advanced societies and growing economies, it is essential to accurately assess the technological innovation effect of capital goods imports on regional development quality. This study explores the path of high-quality urban development from the perspective of...