queuing theory


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queuing theory

A theory by Danish mathematician AK Erlang (1878-1929), which he developed to determine the capacity of telephone networks. Queuing theory (QT) becomes immediately applicable to UK medical practice by substituting hospital beds for Erlang’s telephone lines, call arrival rate for admission rate into beds and average call duration for average length of stay. QT explains why average bed occupancy depends on the size and functional requirements of each specialty bed pool: whereas large hospitals in the USA and Europe have a 77–78% national average bed occupancy rate, the UK average is 87%, a rate which results in larger patient turnaway (e.g., due to queues for a bed, cancelled operations, medical patients in surgical beds), missed waiting time targets and organisational chaos manifested by increased use of antidepressants by overworked staff, increased hospital errors, cross-infection and patient deaths.

R Jones, author of a 2011 paper linking QT to the UK’s chronic bed shortage, argued that the Stafford Hospital scandal and the subsequent 400+ excess deaths were linked to the unrecognised role of excessive whole-hospital occupancy.
References in periodicals archive ?
This phenomenon is analogous to reneging in case of queuing theory.
2]L which is a domain specific modelling language based on queuing theory.
In [6], a simple on-off physical layer model was assumed in [6] and multiple access channel model with homogeneous users was studied in [7] & [8] through combined information theory and queuing theory.
Queuing theory in function of planning the capacity of the container terminal in port of Rijeka, Scientific Journal of Maritime Research, Vol.
Chapter 10 deals with the Queuing theory to determine the service level which minimizes the relevant cost.
The interaction between machines in most sets of earthmoving machinery consisting of excavators and haulers (trucks), found on construction sites, can be analysed from a systemic perspective, using the queuing theory [1-3].
Statistical queuing theory confirms that with intentional scheduling a more economical one-call response system with greater reliability is feasible.
This case applies queuing theory in a small business.
The queuing theory (Waldinger 1996), for example, argues that ethnic minorities are situated in a labour queue based on the immigration history of their group.
In 2000, one magazine editor used a form of maths called queuing theory to prove a mathematical rule: The Law of Inconvenience
A branch of queuing theory known as factory physics is introduced, and its agreement with lean philosophy is demonstrated.
The well-developed theory of interruption processes involves particle cluster arrival at the sensor described using a Poisson distribution--as used in queuing theory.