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  • 1.
    Säfwenberg, Oscar
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Digitala projektstyrningsverktyg: Ett sätt att minska risker och kostnader i vägprojekt2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Since the mid-1990s, construction costs have increased drastically in Sweden, meanwhile competition from foreign entrepreneurs has increased, which means that Swedish entrepreneurs must find new solutions to lower production costs in order to remain competitive. Here unnecessary costs associated with inadequate planning emerges in the form of downtimes and poor utilization of resources.

    Earthwork operations in road construction, which accounts for about 25% of the total construction cost, provides opportunities for optimizations and alternative solutions to lower the construction cost. This master thesis are therefore focused on examining how digital project management tools can contribute to reducing costs and risks for contractors in cut & fill activities in road projects using mass optimization and location-based time planning methods.

    Three research questions have been posed:

     

    RQ 1: What methods are available for production planning of road projects and how can they be implemented?

    RQ 2: How can digital mass optimization and time planning reduce the costs for the contractor?

    RQ 3: How can digital mass optimization and time planning reduce the risks for the contractor?

     

    To answer the research questions, a literature study in mass optimization and time-planning has been carried out along with a case study of a road construction project in Segersta, Sweden. The case study consists of an 850-meter-long new road section and an underpass below the existing railway. The software Dynaroad have been used to plan the road construction in the case study. The case study was divided in three main steps; (1)  data collection, (2) a Dynaroad model based on the original time schedule that was made prior to the project and (3) the optimized model was then compared against the bid calculation and the original schedule.

     

    The results of the case study show that the potential for improvement exists in a number of points, such as Time Planning, Resource Planning, Mass Optimization and examination of bid calculations prior to production start.

    The case study shows that the cost of dumpers in the project can be reduced by about 20% compared to the bid estimate. The cost of production resources, such as excavators and rollers, can be reduced by 30% compared to what the original timetable had cost, which corresponds to a total saving of 12% in terms of the cut & fill activities in the project.

    Today's software makes it possible for contractors to implement methods such as the Line of Balance & Mass optimization to improve their production planning in a much simpler way than previously possible. With Line of Balance schedules the contractor can quickly see improvement areas such as production clashes and activities that may need more or less resources. This gives the contractor greater control over the execution, which can contribute to keeping the budget set in the bid calculation. Combined with a mass optimization, it delivers two strong tools to improve today's production planning that should have a central role in the planning and execution of future road projects.

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