input uncertainty external driving forces uncertainty Uncertainty about the external driving forces that produce changes within the system (the relevant scenario variables and policy variables) and the magnitude of the forces (the values of the scenario and policy variables). Jinjing Guo Oliver He https://www.tandfonline.com/doi/abs/10.1076/iaij.4.1.5.16466 Jie Zheng 外部驱动力量不确定性