Operations Research
Operations Management
Queuing Theory
Queuing Models
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Basics - 3
FORMULA - 1
Average Expected Mean Utilisation Rate or Traffic Intensity
The ratio of the average arrival rate to the average service rate is called utilisation rate or traffic intensity.
This is also known as Clearing Ratio.
Utilisation Rate actually expresses the capacity utilisation of the service system.
That means it shows that how much proportion of the installed capacity is utilised.
Mathematically Utilisation Rate ρ λμ ρ rho
While studying the relationship between λ and μ we ought to consider some natural possibilities.
1 If λ greater than μ:
i Infinite Queue
ii Service facility ALWAYS busy
iii Service system will eventually fail
2 If λ μ:
i Customer comes and served
ii No queue will be there
iii Server will be ALWAYS busy
3 If λ less than μ:
i The MOST REALISTIC situation
ii 1 - λμ 1 - ρ is the proportion of time the service facility would be idle.
Idle Rate 1 - ρ 1 - λμ
Average Expected Mean Idle Time Idle Rate x Service Facility Available 1 - λμ x t
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