Optimal Emergency Ordering Policy for Inventory with a Random-Ending-Time Supply Disruption

Table 1

Notations.

Symbol	Description
	Fixed order cost
	Demand rate
	Holding cost per unit time per unit
	Selling price
	Normal purchase price
	Remaining inventory when supply disruption occurs
	The time when remaining inventory is depleted
	Ending time of supply interruption
	The deadline of ending time of supply interruption
	The emergency ordering time under one-emergency-order policy
	The emergency ordering quantity under one-emergency-order policy
	The first emergency ordering time under two-emergency-order policy
	The second emergency ordering time
	The first emergency ordering quantity under two-emergency-order policy
	The second emergency ordering quantity under two-emergency-order policy
	Indicates the optimal value