Monday, May 25, 2020

Essay about Case Study - 1128 Words

ISyE 6203 Transportation and Supply Chain` Systems Spring 2013 Case Study: Arc Routing The Bridges of Konigsberg 1) Was there ever a date at which an Eulerian walk over the steel bridges of Konigsberg were possible, without using any wooden bridges? If so, when? If not, show that it was never possible. For a Eulerian walk to be possible two conditions must hold a) The undirected graph must be connected b) Each node must be of even degree. Name of the bridge | Date built | Honey Bridge (7) | 1879-1882 | Slaughter Bridge (3) | 1886 | Blacksmith’s Bridge (4) | 1896 | Salesman Bridge (1) | 1900 | Timber Bridge (5) | 1904 | Emperor’s bridge (8) | 1905 | Green Bridge (2) | 1907 | High Bridge (6) | 1937 |†¦show more content†¦2) What idealized arc routing problems have been used for roadway snow and ice control? Idealized models treat RSIC problems as a variant of a) Chinese Postman Problem b) Rural postman problem c) Capacitated Arc Routing Problem d) Sometimes node routing problem instead of arc routing problem 3) What reasons are given for the problems encountered when attempting to implement routing software for roadway snow and ice control? Inability to consider all the nuances of real world operations. Poor implementation and user unfriendly software, distrust of computer based (black box) approaches by public work personnel, unappreciated operational complexities. 4) What beneï ¬ ts were contributed by early roadway snow and ice control software? They focussed attention on savings from better routes. They recogonized the importance of savings from using a rational and analytical approach to fleet size and service level. For eg., the SnowMaster system provided a major advance in the trend towards optimization by encouraging user involvement in route design. 5) Explain the relationship between the duration of a route and the service level provided to the road segments on the route. Service level is the time limit for traversing a route. Trucks usually travel at 20 mph while servicing and 40 mph while deadheading. So, it might not be possible to satisfy a route which is very long. The service level canShow MoreRelatedCase Studies : A Case Study Approach Essay1157 Words   |  5 PagesA case study is a specific instance that is frequently designed to illustrate a more general principle (Nisbet and Watt, 1984). Hitchock and Hughes (1995) further suggest that the case study approach is particularly valuable when the researcher has little control over evens. 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