In this paper, we analyze a repair shop serving several fleets of machines that fail from time to time. To reduce downtime costs, a continuous-review spare machine inventory is kept for each fleet. A spare machine, if available on stock, is installed instantaneously in place of a broken machine. When a repaired machine is returned from the repair shop, it is placed in inventory for future use i...

Successful application of a TBM in a project requires investigating both the ground conditions and the machine and backup system design features. Prediction of the machine performance is very important as it has a big effect on the duration of the project and the costs. In this respect, both penetration rate and advance rate must be estimated. Utilization factor, which depends on the type of op...

Current lower bound estimates of the economic burden wildlife strikes make use mean cost assignment to impute missing values in National Wildlife Strike Database (NWSD). The accuracy these estimates, however, are undermined by skewed nature reported data and fail account for differences observed strike characteristics—e.g., type aircraft, size damage, animal struck, etc. This paper makes modern...

AIMS AND OBJECTIVES To assess the impact of robotic dispensing machines in community pharmacies on staff efficiency and sales of over-the-counter drugs. SETTING The study was done on 253 community pharmacies in Germany that use a robotic dispensing machine manufactured by ROWA during 2008. METHOD Data concerning the financial and economic impact of using a robotic dispensing machine in comm...

This paper develops an integer mathematical programming model to design the cellular manufacturing systems under data envelopment analysis. Since workers have an important role in doing jobs on machines, assignment of workers to cells becomes a crucial factor for fully utilization of cellular manufacturing systems (CMS). The aim of the proposed is to minimize backorder costs and intercellul...