Expanded models of the project portfolio selection problem with loss in divisibility
针对多期项目组合选择问题，首次引入三种项目执行中断的损失假设，并建立数学模型，通过基准算例和实际案例验证模型的有效性。
This research develops three new models for the project portfolio selection problem with multiple periods. To reflect some real situations, three loss assumptions are considered for the interruption of project execution for the first time. The mathematical representations of the loss assumptions are provided and proved. Besides, the workload constraint, capital flow constraint, cardinality constraint, and precedence relationship are incorporated into the models. One benchmark example and one real-world application case are used to demonstrate the capability and characteristics of the proposed models.