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We describe the decision support system RuttOpt, which is de- veloped,for scheduling logging trucks in the Swedish forest industry. The system,is made,up of a number,of modules. One module,is the Swedish road database,NVDB which,consists of detailed information of all the roads in Sweden. This also includes a tool to compute,dis- tances between,locations. A second module,is an optimization,routine that finds a schedule i.e. set of routes for all trucks. This is based on a two phase algorithm,where Linear Programming,and a standard,tabu search method are used. A third module is a database, storing all rel- evant information. At the heart of the system,is a user interface where information and results can be viewed on maps, Gantt schedules and result reports. We also describe the characteristics of the general rout- ing problem,in forestry together with a focus on the planning process and systems,in use in the Swedish situation. The system,RuttOpt has been,used in a number,of case studies and we describe four of these. The case studies have been made,in both forest companies,and hauling companies. The cases range from ten to 110 trucks and with a planning,horizon ranging from between,one and five days. The results show,that the system,can be used to solve large case studies and that

RuttOpt — a decision support system for routing of logging trucks