MODEL:
! Model of a queuing system with N servers, each of
which costs $17/hour. Arrivals occur at a rate of
70 per hour in a Poisson stream. Arrivals finding
all servers busy are lost. A lost customer costs
$35. The average time to process a customer is 5
minutes;
! Minimize total cost =
service costs + lost customer cost;
[COST] MIN = SCOST + LCOST ;
! Cost of servers;
SCOST = 17 * N ;
! Cost of lost customers;
LCOST = 35 * 70 * FLOST ;
! The fraction of customers lost;
FLOST = @PEL( 70 * 5 / 60 , N);
END
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