Modeling and optimizing linear projects using LSM and Non-dominated Sorting Genetic Algorithm (NSGA-II).

Linear projects are a special type of repetitive projects. Major disadvantages have been shown when using the critical path method (CPM) for linear project problems. So, to overcome these shortcomings linear scheduling method (LSM) was used to analyze linear projects. There are different types of activities in linear projects. However, existing mathematical models for LSM cannot represent all types of linear project activities. Therefore, this paper presents a mathematical model that can represent all types of activities using matrices. Moreover, the mathematical model is then used to create an optimization model that minimizes the project duration and cost using non-dominated sorting genetic algorithm II (NSGA-II). The two models can help project managers in scheduling real-life linear projects and find optimum linear project schedules. This paper introduces an optimization model for linear projects that utilizes matrices, offering a different approach in the field of linear project optimization. • Different types of activities in linear schedule method (LSM) are identified • New mathematical formation for (LSM) is developed using matrices • Mathematical formation helps in representing all types activities • Mathematical formation was used to build an optimization model • Optimization model solves time cost tradeoff problem for linear project [ABSTRACT FROM AUTHOR]