! Arrival rate of customers/ hour;

  AR = 25;

! Service time per customer in minutes;

  STM = 6;

! Service time per customer in hours;

  STH = STM/ 60;

! Fraction customers finding all servers busy;

  FB = .05;

! The PEL function finds number of servers

 needed, NS;

  FB = @PEL( AR * STH, NS);

Model: EZQUEUE