The perfect companion for the industrial engineer working on queue problems and situations. Determine the theoretical queue length, the time in the system, the probability of having zero customers in a system, the probably of having any number of customers in a system, and more. This user friendly app can determine these characteristics for M/D/1, M/C/1, M/M/C, and M/M/C/K systems. Let me know if you want more! firstname.lastname@example.org.