Choice-point nets: A discrete-event modelling technique for analyzing health care protocols

Whittaker, Sarah-Jane; Rudie, Karen; McLellan, James A.; Haar, Stefan

doi:10.1109/allerton.2009.5394920

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…If the identities of actors are not important, it is sufficient to keep track of how many actors are in each possible state of the role, e.g., through aggregating models such as vector DES or Petri nets. This approach has been assumed, for example, in other work at our laboratory, [2], [3], or in the area of patient flows and health-care resource allocation [9]. However, as already discussed in Section I, the identity of actors cannot always be ignored.…”

Section: Dynamic Des With Instancesmentioning

confidence: 99%

“…In our previous research, we proposed a methodology where certain aspects of DES modelling can be simplified with the use of templates [1]. Recently, in cooperation with the Kingston, Frontenac and Lennox & Addington Public Health Unit, we have been interested in the application of DES supervisory control to the management of emergency situations, e.g., disease outbreaks [2], [3].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic discrete-event systems with instances for the modelling of emergency response protocols

Grigorov

Rudie

2011

Proceedings of the 2011 American Control Conference

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A type of model, dynamic discrete-event systems with instances, is proposed for use with time-varying systems where a number of system components may share common behavior. The motivation for this model comes from the area of emergency response protocols where systems may change unexpectedly, however, there are predefined types of actors. The model is based on previous work on dynamic discreteevent systems and on template design. Synchronization patterns are introduced which allow the generic definition of component interactions regardless of a particular system composition. The synchronous product operation is updated in order to employ these patterns. Advantages of the proposed model include compactness of representation, preservation of the identity (history) of individual components and, with the use of online control, amenability to dynamic changes of control specifications.

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Section: Dynamic Des With Instancesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic discrete-event systems with instances for the modelling of emergency response protocols

Grigorov

Rudie

2011

Proceedings of the 2011 American Control Conference

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“…Through the use of recursive algorithms and the given properties, it is then possible to ask questions about a protocol and receive answers. Preliminary research on choice-point nets, augmented reachability graphs and question restrictions has been published in [64], [65].…”

Section: Chapter 1 Introductionmentioning

confidence: 99%

Augmenting Petri Nets to Model Health-Care Protocols

Whittaker

Rudie

McLellan

et al. 2010

IFAC Proceedings Volumes

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An outbreak of an infectious illness can have a devastating impact on a population. Once confirmed, local health care organizations will attempt to reduce the spread of the disease by adopting a set of pre-defined guidelines. Modelling such a system presents a number of unique challenges: timing and probability constraints must be captured, scaling must be seamless and methods for analysis must be robust and efficient. To satisfy these requirements, an augmented form of Petri net known as a choice-point net is introduced in this thesis. In this data structure, timing is associated with event-based transitions that may fire multiple times to simulate the same event occurring several times in parallel. Events may result in several possible outcomes, or choices, each of which is given a probability of occurrence. A choice-point net may be scaled without requiring structural changes to the model and may be analyzed by unravelling it into a finite-state automaton representing (perhaps portions of) its behaviour. By translating questions about the protocol into the mathematical language of the net, recursive algorithms may then be employed to provide health-care professionals with answers to their questions. To demonstrate the expressiveness of choice-point nets, an actual, in-use protocol to control respiratory infection outbreaks in long-term care homes is modelled. Three similar abridged scenarios set in a small long-term care home are also modelled, analyzed and compared.

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A Summary of Some Discrete-Event System Control Problems

Rudie

2011

Implementation and Application of Automata

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Choice-point nets: A discrete-event modelling technique for analyzing health care protocols

Cited by 5 publications

References 15 publications

Dynamic discrete-event systems with instances for the modelling of emergency response protocols

Dynamic discrete-event systems with instances for the modelling of emergency response protocols

Augmenting Petri Nets to Model Health-Care Protocols

A Summary of Some Discrete-Event System Control Problems

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