Each time an individual completes service at a service station, a data record of that service is kept. Data records are Named Tuples with the following attributes:
| Attribute | Description |
|---|---|
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 class that they were when they received service at that node. |
original_customer_class |
The number of the customer's class when they arrived at the node. |
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 immediately 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 what type of data record this is. See below. |
- The attribute
record_typecan be one of: "service": a completed service"interrupted service": an interrupted service"renege": the waiting time while a customer waited before reneging"baulk": the record of a customer baulking"rejection": the record of a customer being rejected due to the queue being full
You may access these records as a list of named tuples, using the Simulation's get_all_records method:
>>> recs = Q.get_all_records() # doctest:+SKIP
By default, all record types are included. However, we may only want some of the record types, and these can be filtered by passing a list of desired record types to the only keyword argument. For example, to only receive service and reneging customers, we can use:
>>> recs = Q.get_all_records(only=["service", "renege"]) # doctest:+SKIP