A Disruption Recovery Problem with Time Windows Change in the Last Mile Delivery of Online Shopping

Table 1

Notions used in formulation.

Sets
G	Network,
V	Node set,
	Depot set,
	Customer set,
	SDF set,
E	Arc set,
	Delivery arc set,
	Pickup arc set,
Parameters
M	Number of SDFs
N	Number of customers
	Distance of arc
	Travel time of arc
	Pickup cost of arc
	Pickup time of arc
	Time window of customer
	Unit opening cost of SDF p
L	Large positive number
	Sub-weight of delivery delay time
	Sub-weight of pickup distance
	Weight of pickup cost
	Weight of routing cost
	Weight of SDFs opening cost
	Server radius of the SDFs
Decision variables
	Binary variable, , if arc(i,j) is used by courier; otherwise,
	Binary variable, , if customer is assigned to SDF ; otherwise,
	Integer variable, arrival time to node