List of Available Results

Each time an individual completes service at a service station, a data record of that service is kept. The records should look something like the table below:

I.D	Class	Node	Arrival Date	Wait Time	Service Start Date	Service Time	Service End Date	Time Blocked	Exit Date	Dest.	Queue Size at Arrival	Queue Size at Depart.	Server I.D.	Record Type
22759	1	1	245.601	0.0	245.601	0.563	246.164	0.0	246.164	-1	0	2	1	‘service’
41129	0	1	245.633	0.531	246.164	0.608	246.772	0.0	246.772	-1	1	5	1	‘service’
00195	0	2	247.821	0.0	247.841	1.310	249.151	0.882	250.033	1	0	0	2	‘service’
…	…	…	…	…	…	…	…	…	…	…	…	…	…	…

You may access these records as a list of named tuples, using the Simulation’s get_all_records method:

>>> recs = Q.get_all_records() 

The data records contained in this list are named tuples with the following variable names:

• id_number

  • The unique identification number for that customer.

• customer_class

  • The number of that customer’s customer class. If dynamic customer classes are used, this is the customer’s previous class, before a new customer class is sampled after service.

• node

  • The number of the node at which the service took place.

• arrival_date

  • The date of arrival to that node, the date which the customer joined the queue.

• waiting_time

  • The amount of time the customer spent waiting for service at that node.

• service_start_date

  • The date at which service began at that node.

• service_time

  • The amount of time spent in service at that node.

• service_end_date

  • The date which the customer finished their service at that node.

• time_blocked

  • The amount of time spent blocked at that node. That is the time between finishing service at exiting the node.

• exit_date

  • The date which the customer exited the node. This may be immediatly after service if no blocking occured, or after some period of being blocked.

• destination

  • The number of the customer’s destination, that is the next node the customer will join after leaving the current node. If the customer leaves the system, this will be -1.

• queue_size_at_arrival

  • The size of the queue at the customer’s arrival date. Does not include the individual themselves.

• queue_size_at_departure

  • The size of the queue at the customer’s exit date. Does not include the individual themselves.

• server_id

  • The unique identification number of the server that served that customer.

• record_type

  • Indicates if the record describes a service, interrupted service, or a customer reneging.