http://repub.eur.nl/res/concept/jel-L92/ Recent publications classified by JEL Code L92 en http://repub.eur.nl/static-eur/img/logo.png http://repub.eur.nl http://repub.eur.nl/res/pub/7659/ 2006-03-31T00:00:00Z This report is the second part of a PhD project entitled "The Econometrics of Maritime Safety – Recommendations to Enhance Safety at Sea" which is based on 183,000 port state control inspections and 11,700 casualties from various data sources. Its overall objective is to provide recommendations to improve safety at sea. The second part looks into the probability of detention across several port state control regimes while the third part looks at the effect of inspections on casualties as well as the evaluation of target factors. Using binary logistic regression, a method can be established that visualizes the differences of port state control inspections across several regimes. The results indicate that the differences towards the probability of detention are merely reflected by the differences in port states and the treatment of deficiencies and not necessarily by age, size, flag, class or owner. The analysis further shows that there is room for further harmonization in the area of port state control. Knapp, S. Franses, Ph.H.B.F. http://repub.eur.nl/res/pub/7328/ 2006-02-10T00:00:00Z Eén van de laatste onderdelen van het planningsproces voor het vervoeren van treinreizigers is operationele rangeerplanning. Rangeerplanning richt zich op de logistiek binnen een station en de directe omgeving ervan. De vraag naar transport varieert gedurende de dag en daarom heeft een spoorvervoerder buiten de spits vaak rollend materieel over. Vaak wordt dit overtollig materieel tijdelijk opgesteld op een rangeerterrein zodat de hoofdinfrastructuur gebruikt kan worden door andere treinen. Het toewijzen van aankomend materieel aan vertrekkend materieel, het routeren van materieel door stations, het reinigen van materieel, en personeelsplanning zijn, naast het opstellen, onderdelen van rangeerplanning. "Algoritmische Beslissingsondersteuning voor Rangeerplanning” introduceert de karakteristieken van rangeren en zet een eerste stap in de richting van kwantitatieve modellen en algoritmen voor het ondersteunen van de rangeerplanning. Verschillende algoritmen voor het oplossen van verschillende kwantitatieve modellen lijken in meerdere en mindere mate op de huidige praktijk van rangeerplanners. Rekenresultaten gebaseerd op realistische data laten zien dat goede oplossingen vaak binnen enkele minuten rekentijd worden gevonden. Daarnaast zijn deze algoritmen ontworpen om interactie met rangeerplanners te stimuleren. De algoritmen vormen een solide basis voor een geavanceerd beslissingsondersteunend systeem voor rangeerplanners. Lentink, R.M. http://repub.eur.nl/res/pub/7895/ 2006-01-01T00:00:00Z The lack of trust in the maritime industry between all the industry organizations and regulators has created an inspection industry which is heavily controlled by oil majors in order to limit their liability. This report is an introductory part of a PhD project called "The Econometrics of Maritime Safety – Recommendations to Enhance Safety at Sea" which is based on 183,000 port state control inspections1 and 11,700 casualties from various data sources. Its overall objective is to provide recommendations to improve safety at sea. This part identifies all inspections that are performed in the name of safety onboard vessels, their estimated costs and frequencies and brings them in relation with insurance claim costs from P&I Clubs. The probability of casualty is analyzed per frequency of inspection and detention. The results reveal that certain ships are inspected frequently and that over-inspection does not necessarily decrease the probability of having a casualty but can rather increase it. Knapp, S. Franses, Ph.H.B.F. http://repub.eur.nl/res/pub/7896/ 2006-01-01T00:00:00Z This report is the third part of a PhD project entitled "The Econometrics of Maritime Safety – Recommendations to Enhance Safety at Sea" which is based on 183,000 port state control inspections and 11,700 casualties from various data sources. Its overall objective is to provide recommendations to improve safety at sea. The second part looks into the differences across port state control regimes based on the probability of detention while the third part is measuring the effect of inspections on the probability of casualty which can be measured for very serious casualties but not for serious or less serious casualties. It further determines the magnitude of improvement areas for targeting substandard vessels and gives an evaluation of the target factor. Knapp, S. Franses, Ph.H.B.F. http://repub.eur.nl/res/pub/7897/ 2006-01-01T00:00:00Z This report is the fourth part of a PhD project called "The Econometrics of Maritime Safety – Recommendations to Enhance Safety at Sea" and is based on 183,000 port state control inspections and 11,700 casualties from various data sources. Its overall objective is to provide recommendations to improve safety at sea. The fourth part looks into measuring the effect of inspections on the probability of casualty on either seriousness or casualty first event to show the differences across the regimes. It further gives a link of casualties that were found during inspections with either the seriousness of casualties and casualty first events which reveals three areas of improvement possibilities to potentially decrease the probability of a casualty – the ISM code, machinery and equipment and ship and cargo operations. Knapp, S. Franses, Ph.H.B.F. http://repub.eur.nl/res/pub/6773/ 2005-07-06T00:00:00Z Michiel Vromans was born on January 31, 1976, in Veghel, the Netherlands. In 1994- 1995 he visited the Emporia State University, Emporia, Kansas, USA. His focus that year was on both geography and mathematics. In 1995 he started his study in Econometrics at the University of Groningen, with a major in Operations Research. He graduated in 2000 with a Master’s thesis on the automation of train crew planning. This thesis was written during a nine month internship at NS Reizigers, the largest Dutch passenger railway operator. In October 2000, he started as a Ph.D. student at the Rotterdam School of Management, Erasmus University Rotterdam. His Ph.D. research considered the improvement of the reliability and punctuality of railway systems. Much of his research was carried out at, and in cooperation with the logistics department of NS Reizigers. From February 2002 until August 2003, he supported NS Reizigers with two practical studies on human resource management for train personnel. This also led to an article in Interfaces. Several other of his articles, related to this thesis, are forthcoming in scientific journals and books. Several research papers have been published conference proceedings. He has also presented his research work at various international conferences and workshops. In October 2004 the joint paper Reliability and Heterogeneity of Railway Services with Leo Kroon and Rommert Dekker won the first prize in the 2004 student competition of the Rail Applications Special Interest Group of INFORMS. In November 2004, he was awarded the IT&L-award of TRAIL and AVV, with a joint paper entitled Stochastic Optimization of Railway Timetables. In January 2005 he joined ProRail, the Dutch railway infrastructure manager. His work there, partially in line with his dissertation research, focuses on the capacity of the Dutch railway network and timetabling norms. Vromans, M.J.C.M. http://repub.eur.nl/res/pub/6636/ 2005-06-07T00:00:00Z The Port of Rotterdam is a key container transshipment hub for Europe. Inland container shipping is important to connect the hinterland (40% market share). Barges visit several terminals per round-trip through the Port, thus requiring a proper planning support – to avoid planning problems such as double-bookings. A pilot version of an inter-organizational system has been build, titled APPROACH. This paper describes an industry workshop where a gamesetting was used to evaluate the current manual planning practices with the APPROACH outcome – and delivered interesting findings; both for actual implementation of the system as well as it unveiled issues for further research. Moonen, J.M. Rakt, B. van de Miller, I. Nunen, J.A.E.E. van Hillegersberg, J. van http://repub.eur.nl/res/pub/1076/ 2003-12-16T00:00:00Z 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 disruptions and at least as many causes for delays to spread around in space and time. One way to increase the reliability is to reduce the propagation of delays due to the interdependencies between trains. In this paper we attempt to decrease these interdependencies by reducing the running time differences per track section, i.e. by creating more homogeneous timetables. Because of the complexity of railway systems, we use network wide simulation for the analysis of the alternative timetables. We report on both theoretical and practical cases. Besides a comparison of different timetables, also general timetabling principles are deduced. Vromans, M.J.C.M. Dekker, R. Kroon, L.G. http://repub.eur.nl/res/pub/973/ 2003-10-17T00:00:00Z Ports provide jetty facilities for ships to load and unload their cargo. Jetty capacity is costly and therefore limited, causing delays for arriving ships. However, ship delays are also costly, so terminal operators attempt to min imize their number and duration. Here, simulation has proved to be a very suitable tool. However, in port simulation models, the impact of the arrival process of ships on the model outcomes tends to be underestimated. This report considers three arrival processes: stock-controlled, equidistant, and uncontrolled. We assess how their deployment in a port simulation model, based on data from a real case study, affects the efficiency of the loading and unloading process, making a case for careful modeling of arrival processes in port simulations. Uncontrolled, which is an assumed arrival process property in many client-oriented simulations, actually performs worst in terms of both ship delays and required storage capacity. Stock-controlled arrivals perform best with regard to large vessel delays and storage capacity. Additional control of the arrival process through the application of a priority scheme in processing ships further impacts efficiency in all three cases. Asperen, E. van Dekker, R. Polman, M. Swaan Arons, H. de Waltman, L.R.