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Benefits and limitations of queuing theory


Queuing theory has been used for many real life applications to a great advantage. It is so because many, problems of business and industry can be assumed/simulated to be arrival-departure or queuing problems, In any practical life situations: it is not possible to accurately determine the arrival and departure of customers when the number and types of facilities as also the requirements of the customers are not known. Queuing theory techniques, in particular, can help us to determine suitable number and type of service facilities to be provided to different types of customers. Queuing theory techniques can be applied to problems such as:-

(a)             Planning, scheduling and sequencing of parts and. components to assembly lines in a production system.

(b)              Scheduling of workstations and machines performing different operations in mass production.

(c)             Scheduling and dispatch of war material of special nature based on operational needs.

(d)             Scheduling of service facilities in a repair and maintenance workshop.

(e)             Scheduling of overhaul of used engines and other assemblies of aircrafts, missile systems, transport fleet etc.

(f)               Scheduling of limited transport fleet to a large number of users.

(g)             Scheduling of landing and take off from airports with heavy duty of air traffic and limited facilities

(h)             Decision of replacement of plant, machinery, special maintenance tools and other equipment based on different criteria.

Special benefit which this technique enjoys in solving problems such as above are

  1.         i.                        Queuing theory attempts to solve problems based on a scientific understanding of the problems and solving them in optimal manner so that facilities are fully utilised and waiting time is reduced to minimum possible.
  2.      ii.                        Waiting time (or queuing) theory models can recommend arrival of customers to be serviced, setting up of workstations, requirement of manpower etc. based on probability theory.