Linear repetitive projects, which are resource-driven in nature, are characterized by a series of repetitive activities in which the resources share the same space either in sequential or parallel manner. The frequent movement of resources over limited shared space needs to be well-planned to avoid potential issues during the execution of linear projects. As such, schedules developed for these projects needs not only to take into account all the logical, project-dependent and precedence constraints of activities but also to incorporate the space and time constraints that co-exist for the movement of thei8r resources. Negligence in incorporating spatial and temporal constraints in developing and improving schedules of linear projects increases the risk of delays and workspace congestions that can substantially hinder the performance of the activity resources. The study presented here proposes and develops an uncertainty-aware scheduling and control framework for linear projects to address the needs mentioned above. For this purpose, first, a new type of float was introduced as the Space-Time Float. The Space-Time Float is an envelope for all possible movement patterns that a linear activity or its associated resources can take considering the time and space constraints of that activity. The next endeavor in the development of the uncertainty-aware linear scheduling and control framework was to augment the current linear scheduling methods by presenting an uncertainty-aware optimization method to optimize the duration of linear projects while minimizing their potential congestions. A constraint satisfaction approach was used for the two-tier optimization of duration and congestion, and a fuzzy inference system was incorporated to assess the inherent uncertainty in linear activities. A new type of buffer, Uncertainty-Aware Productivity Buffer is also introduced to account for the uncertainties inherent in project activities. Spatial progress of activities needs not only to be considered in the planning phase but also to be closely monitored during construction. The framework presented in this study also applies to the monitoring and control of linear projects. While most of the current methods still do not accommodate real-time bi-directional control of linear projects, this framework is based on the Cyber-Physical Systems (CPS) architecture and bi-directional communication of data. To this end, a CPS-based application for Earned Value (EV) monitoring and control of road and highway projects is presented. Different steps of the generated framework are validated through various literature and field-based case studies. The results demonstrate the effectiveness of the presented method in planning and control of unforeseen variations from the planned schedules of linear projects. As such, the present study contributes and adds to the current body of knowledge of linear projects by presenting an efficient scheduling and control framework that takes into account logical, spatio-temporal and project-based constraints of linear activities. / Thesis / Doctor of Philosophy (PhD)

En nuestro país se viene impulsando la ejecución de obras viales y de saneamiento, debido a la falta de infraestructura a nivel nacional. Ambos sectores se encuentran en prioridad de la inversión nacional, ya que fortalecen el crecimiento económico del país. Estas obras tienen cierta similitud, ya que debido a su extensión ambas son de carácter lineal y continuo. Sin embargo, la productividad de este tipo de proyectos presenta algunas deficiencias, debido al tipo de método de planificación y control. En países de Europa se emplean los métodos de programación lineal que han demostrado obtener buenos resultados. Entonces, se deben conocer y aplicar técnicas que busquen ponderar el trabajo productivo a través de métodos eficientes. El objetivo de este estudio es desarrollar una guía de aplicación del Linear Schedule Method durante el proceso de control en proyectos de carreteras y saneamiento en el Perú. Para optimizar este método hemos implementado el uso del Last Planner System y la Gestión del Valor Ganado. Se ha desarrollado el método en 2 proyectos lineales para identificar sus beneficios y así realizar una guía optimizada. En un tercer proyecto se aplicó la guía, la cual nos ayudó a aumentar la confiabilidad de la planificación y control, viéndose reflejada en su productividad ante otros métodos de control de proyectos lineales. / In our country, the execution of road and sanitation works is being promoted due to the lack of infrastructure at national level. Both sectors are priority of the national investment, as they strengthen the country's economic growth. These works have certain similarity; due to their extension, both of them are linear and continuous. However, the productivity of this type of projects present some deficiencies due to the type of planning and control method. For example, in some Europe countries are in practiced methods of linear programming that have proven to be successful. Therefore, it is important to know and apply techniques that seek to weigh productive work through methods efficient. The objective of this study is to develop an application guide for the linear programming method during the control process in highways and sanitation projects in Peru. To optimize this method, we have to implement the use of the Last Planner System and the Management of the earned value. The method has been developed in two linear projects to identify their benefits and thus make an optimized guide. In a third project, the guide was applied which it help us to increase the reliability of planning and control, being reflected in its productivity compared to other methods of controlling linear projects. / Tesis