Showing 1 - 8 of 8
Navigational systems assist drivers in finding a route between two locations that is time optimal in theory but seldom in practice due to delaying circumstances the system is unaware of, such as traffic jams. Upon arrival at the destination the service of the system ends and the driver is forced...
Persistent link: https://www.econbiz.de/10010730950
of delays of trains. A key issue for the acceptability of the duties is the included amount of variation per duty. The …
Persistent link: https://www.econbiz.de/10010731013
Real-time railway operations are subject to stochastic disturbances. However, a railway timetable is a deterministic plan. Thus a timetable should be designed in such a way that it can absorb the stochastic disturbances as well as possible. To that end, a timetable contains buffer times between...
Persistent link: https://www.econbiz.de/10010731135
Based on a literature survey, we aim to answer our main question: “How should we plan and execute logistics in supply chains that aim to meet today’s requirements, and how can we support such planning and execution using IT?” Today’s requirements in supply chains include...
Persistent link: https://www.econbiz.de/10010731472
Railway rolling stock (locomotives, carriages, and train units) is one of the most significant cost sources for operatorsof passenger trains, both public and private. Rolling stock costsare due to material acquisition, power supply, and material maintenance. The efficient circulation of rolling...
Persistent link: https://www.econbiz.de/10010731560
Transshipments, monitored movements of material at the same echelon of a supply chain, represent an effective pooling mechanism. With a single exception, research on transshipments overlooks replenishment lead times. The only approach for two-location inventory systems with non-negligible lead...
Persistent link: https://www.econbiz.de/10010837546
In this paper we deal with a common problem found in the operations of security and preventive/corrective maintenance services: that of routing a number of mobile resources to serve foreseen and unforeseen tasks during a shift. We define the (Mobile Re-Allocation Problem) MRAP as the problem of...
Persistent link: https://www.econbiz.de/10010731075
disruptions and at least as many causes for delays to spread around in space and time. One way to increase the reliability is to …Reliability is one of the key factors in transportation, both for passengers and for cargo. This paper examines … reliability in public railway systems. Reliability of railway services is a complex matter, since there are many causes for …
Persistent link: https://www.econbiz.de/10010731209