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首先,本文在已有可打断项目组合选择模型的基础上,引入了消耗性资源和可更新资源约束,构建了一个更符合实际的新模型;其次,为了达到模型简化的目的,本文给出了资金约束的现值表示,并给出了理论证明;最后,利用GAMS对模型进行了算例分析。数值实验结果表明:1)资源约束下的项目打断有时可以给企业带来积极效益,这有别于已有的研究;2)在考虑资源约束的情况下,资源消耗少且同时收益高的项目应优先执行;3)当资源的供给量较少时,资源约束是决定项目选择的关键因素。此外,通过企业实际的案例对数值实验结果进行了验证。
First of all, based on the existing models that can interrupt the project portfolio selection, this paper introduces the consumptive resources and renewable resources constraints, and builds a new model that is more realistic. Secondly, in order to achieve the purpose of model simplification, this paper gives The current value of the financial constraints that, and gives the proof of theory; Finally, the use of GAMS model analysis. The numerical results show that: 1) Interruptions of projects under resource constraints can sometimes bring positive benefits to the enterprise, which is different from the existing research; 2) In the case of resource constraints, resource consumption is low and both benefits are high Projects should be prioritized; 3) Resource constraints are the key determinants of project selection when there are fewer resources available. In addition, the numerical experiment results are verified through the practical cases of enterprises.