Senior Seminar course project

Customers visit some kind of store and get a service number and are fed into
one a checkout lane.  Some times the customers are dissatisfied and they need
to be helped a second time.

This simulation was written to determine weather having a priority queue for
dissatisfied customers will improve the throughput of the store.

Dependences:
SimPy - simpy.sourceforge.net
Python - python.org

Running:
./shopping.py
or
python shopping.py
on unix systems.

Output:
with a priority queue
using seed value 99999:
	Average wait in queue for  99 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for  99 transactions was 2.754     minutes.
	min: 2.00642607315 max: 4.77794964078
	Average Total time for  99 customers was 2.754 minutes.
	min: 2.00642607315 max: 4.77794964078
	Max number of servers busy: 3
without a priority queue
using seed value 99999:
	Average wait in queue for  99 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for  99 transactions was 2.754     minutes.
	min: 2.00642607315 max: 4.77794964078
	Average Total time for  99 customers was 2.754 minutes.
	min: 2.00642607315 max: 4.77794964078
	Max number of servers busy: 3
with a priority queue
using seed value 99998:
	Average wait in queue for  89 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for  89 transactions was 2.651     minutes.
	min: 2.0131218271 max: 4.78106155754
	Average Total time for  89 customers was 2.651 minutes.
	min: 2.0131218271 max: 4.78106155754
	Max number of servers busy: 5
without a priority queue
using seed value 99998:
	Average wait in queue for  89 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for  89 transactions was 2.651     minutes.
	min: 2.0131218271 max: 4.78106155754
	Average Total time for  89 customers was 2.651 minutes.
	min: 2.0131218271 max: 4.78106155754
	Max number of servers busy: 5
with a priority queue
using seed value 99997:
	Average wait in queue for  99 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for  99 transactions was 2.687     minutes.
	min: 2.01156586559 max: 4.09037219053
	Average Total time for  99 customers was 2.687 minutes.
	min: 2.01156586559 max: 4.09037219053
	Max number of servers busy: 4
without a priority queue
using seed value 99997:
	Average wait in queue for  99 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for  99 transactions was 2.687     minutes.
	min: 2.01156586559 max: 4.09037219053
	Average Total time for  99 customers was 2.687 minutes.
	min: 2.01156586559 max: 4.09037219053
	Max number of servers busy: 4
with a priority queue
using seed value 99996:
	Average wait in queue for  82 transactions was 0.000 minutes.
	min: 0.0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for  82 transactions was 2.555     minutes.
	min: 2.01360544171 max: 4.14947477808
	Average Total time for  82 customers was 2.555 minutes.
	min: 2.01360544171 max: 4.14947477808
	Max number of servers busy: 3
without a priority queue
using seed value 99996:
	Average wait in queue for  82 transactions was 0.000 minutes.
	min: 0.0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for  82 transactions was 2.555     minutes.
	min: 2.01360544171 max: 4.14947477808
	Average Total time for  82 customers was 2.555 minutes.
	min: 2.01360544171 max: 4.14947477808
	Max number of servers busy: 3
with a priority queue
using seed value 99995:
	Average wait in queue for 125 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for 125 transactions was 2.593     minutes.
	min: 2.0286448651 max: 4.20389419631
	Average Total time for 125 customers was 2.593 minutes.
	min: 2.0286448651 max: 4.20389419631
	Max number of servers busy: 4
without a priority queue
using seed value 99995:
	Average wait in queue for 125 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for 125 transactions was 2.593     minutes.
	min: 2.0286448651 max: 4.20389419631
	Average Total time for 125 customers was 2.593 minutes.
	min: 2.0286448651 max: 4.20389419631
	Max number of servers busy: 4
with a priority queue
using seed value 99994:
	Average wait in queue for  99 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for  99 transactions was 2.629     minutes.
	min: 2.0149649517 max: 4.38541672312
	Average Total time for  99 customers was 2.629 minutes.
	min: 2.0149649517 max: 4.38541672312
	Max number of servers busy: 3
without a priority queue
using seed value 99994:
	Average wait in queue for  99 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for  99 transactions was 2.629     minutes.
	min: 2.0149649517 max: 4.38541672312
	Average Total time for  99 customers was 2.629 minutes.
	min: 2.0149649517 max: 4.38541672312
	Max number of servers busy: 3
with a priority queue
using seed value 99993:
	Average wait in queue for  91 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for  91 transactions was 2.616     minutes.
	min: 2.00039361946 max: 4.42934944582
	Average Total time for  91 customers was 2.616 minutes.
	min: 2.00039361946 max: 4.42934944582
	Max number of servers busy: 3
without a priority queue
using seed value 99993:
	Average wait in queue for  91 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for  91 transactions was 2.616     minutes.
	min: 2.00039361946 max: 4.42934944582
	Average Total time for  91 customers was 2.616 minutes.
	min: 2.00039361946 max: 4.42934944582
	Max number of servers busy: 3
with a priority queue
using seed value 99992:
	Average wait in queue for 120 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for 120 transactions was 2.693     minutes.
	min: 2.00549102365 max: 4.45827442839
	Average Total time for 120 customers was 2.693 minutes.
	min: 2.00549102365 max: 4.45827442839
	Max number of servers busy: 5
without a priority queue
using seed value 99992:
	Average wait in queue for 120 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for 120 transactions was 2.693     minutes.
	min: 2.00549102365 max: 4.45827442839
	Average Total time for 120 customers was 2.693 minutes.
	min: 2.00549102365 max: 4.45827442839
	Max number of servers busy: 5
with a priority queue
using seed value 99991:
	Average wait in queue for  95 transactions was 0.000 minutes.
	min: 0.0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for  95 transactions was 2.663     minutes.
	min: 2.00604226383 max: 5.4938031153
	Average Total time for  95 customers was 2.663 minutes.
	min: 2.00604226383 max: 5.4938031153
	Max number of servers busy: 3
without a priority queue
using seed value 99991:
	Average wait in queue for  95 transactions was 0.000 minutes.
	min: 0.0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for  95 transactions was 2.663     minutes.
	min: 2.00604226383 max: 5.4938031153
	Average Total time for  95 customers was 2.663 minutes.
	min: 2.00604226383 max: 5.4938031153
	Max number of servers busy: 3
with a priority queue
using seed value 99990:
	Average wait in queue for 106 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for 106 transactions was 2.628     minutes.
	min: 2.00745987078 max: 4.97484479401
	Average Total time for 106 customers was 2.628 minutes.
	min: 2.00745987078 max: 4.97484479401
	Max number of servers busy: 4
without a priority queue
using seed value 99990:
	Average wait in queue for 106 transactions was 0.000 minutes.
	min: 0 max: 0.0
	Average queue length was 0.000 customers.
	min: 0 max: 0
	Average time server took in lane for 106 transactions was 2.628     minutes.
	min: 2.00745987078 max: 4.97484479401
	Average Total time for 106 customers was 2.628 minutes.
	min: 2.00745987078 max: 4.97484479401
	Max number of servers busy: 4