A novel time, cost, quality and risk tradeoff model with a knowledge-based hesitant fuzzy information: An R&D project application

•A novel approach for identifying the best implementation situation for each activity in a project.•Optimizing and balancing time, cost, quality, and risk criteria under uncertain circumstances via hesitant fuzzy linguistic term sets (HFLTs).•Model validation thru a real-world case study from an R&a...

Ausführliche Beschreibung