From product shortages to capacity constraints in the freight sector, coronavirus pandemic has impacted supply chains continuously if inconsistently. As COVID-19 continues disrupt global economy, will chain disruptions continue, too?

Supply chain disruption risk usually poses a serious challenge to the management of emergency supplies procurement between government and enterprises in cooperation. To research impact supply on demand sides for disaster relief, model based quantity flexibility contract is constructed. The introduces stockout measure degree uses per unit material relief value quantify benefits. Further, it anal...