Three-Echelon Inventory Model with Permissible Delay in Payments under Controllable Lead Time and Backorder Consideration

Table 1

Lead time data of numerical example.

Lead time component, 𝑗	Normal duration, 𝑇𝑗 (days)	Minimum duration, 𝑡𝑗 (days)	Crashing cost, 𝐶𝑗 ($/day)
1	20	14	1.2
2	16	10	5