Concrete Vehicle Scheduling Based on Immune Genetic Algorithm

Table 1

Definition of model parameters.

Notation	Corresponding meaning
	The loading time of concrete mixing plant i
	The moment of loading of the kth mixing truck dispatched from concrete mixing plant i to construction site j
	The moment of departure of the kth mixing truck dispatched from concrete mixing plant i to construction site j
	The moment of arrival of the kth mixing truck dispatched from concrete mixing plant i to construction site j
	The moment when the kth mixing truck sent from concrete mixing plant i to construction site j starts pouring
	The return moment of the kth mixing truck dispatched from concrete mixing plant i to construction site j
	Transportation time from concrete mixing plant i to construction site j
	The time required to return from construction site j to concrete mixing plant i
	Waiting time of the kth vehicle dispatched from concrete mixing plant i to construction site j for unloading
	Construction site waiting time for the mixing truck to deliver concretes
	The unloading and pouring time of the mixing truck of concrete mixing plant i
	The maximum transport time of the mixing truck that is acceptable for the construction site
	The maximum time interval between two consecutive deliveries
	The set of delivery depots
	The set of mixing trucks