Due to the complexity of optimum replacement problems over finite lime horizons various asymptotic criteria based upon … fixed age replacement policies have been employed in the literature and in practice. In this paper the relationships between … of these is obtained, and for distributions with Increasing Hazard Rate an ordering of the optimum replacement time is …

(MDP) model, using it to obtain replacement policies for the exhibitor. We examine the effect of differences in quality and …

replacement ratio are identical. Yet, the authors reached opposite conclusions and the latter's view prevailed, which is weaker in …

be used as replacement for R134a in domestic refrigerator. …

water is appropriate for recovering CH4 with CO2. For the replacement mechanism, it is assumed that the CO2–CH4 replacement … kinetics model was constructed to describe the replacement process, which considers not only the kinetic reaction of CH4–CO2 … replacement but also the reaction between CO2 and free water. The calculated results agree well with the experimental data. The …

. Final services offer more examples of actual or potential replacement, including the highly controversial example of … geoengineering for climate regulation. Finally, there are numerous examples of replacement technologies for environmental goods … pharmaceuticals). The full economic costs of replacement technologies have rarely been explored, and in some cases it appears that the …

This paper develops an optimal replacement strategy for capital intensive equipment with long delivery lead time. The … strategy is based on an extended version of the real options approach to repeated replacement decisions, in which the goal is … to determine the operating cost and delivery lead-time conditions upon which a replacement should be ordered. …