Urban Logistics Services Supply Chain Process Modelling Based on the Underground Logistics System via the Hierarchical Colored Petri Net

Table 2

Parameter setting.

Process	Operating time (min)	Operational cost (yuan/min)
Demand management	(1–5)	0.02
Bookkeeping	(1–5)	0.01
Information process	(1–5)	0.04
Pickup	(10–30)	0.04
Warehousing	(5–10)	0.08
Circulation processing	(5–10)	0.06
Transportation	(3–7) in each node	0.06
Transshipment	(1–4)	0.08
3PL distribution	(5–30)	0.10
Conveyor belts	(10–30)	0.08
Unmanned vehicles	(10–30)	0.06
Order review	(1–4)	0.02