@article{YangDumasGarciaBanuelosetal.2012,
  author    = {Yang, Yong and Dumas, Marlon and Garcia-Banuelos, Luciano and Polyvyanyy, Artem and Zhang, Liang},
  title     = {Generalized aggregate quality of service computation for composite services},
  series = {The journal of systems and software},
  volume    = {85},
  journal   = {The journal of systems and software},
  number    = {8},
  publisher = {Elsevier},
  address   = {New York},
  issn      = {0164-1212},
  doi       = {10.1016/j.jss.2012.03.005},
  pages     = {1818 -- 1830},
  year      = {2012},
  abstract  = {This article addresses the problem of estimating the Quality of Service (QoS) of a composite service given the QoS of the services participating in the composition. Previous solutions to this problem impose restrictions on the topology of the orchestration models, limiting their applicability to well-structured orchestration models for example. This article lifts these restrictions by proposing a method for aggregate QoS computation that deals with more general types of unstructured orchestration models. The applicability and scalability of the proposed method are validated using a collection of models from industrial practice.},
  language  = {en}
}
@article{PolyvyanyyGarciaBanuelosDumas2012,
  author    = {Polyvyanyy, Artem and Garcia-Banuelos, Luciano and Dumas, Marlon},
  title     = {Structuring acyclic process models},
  series = {Information systems},
  volume    = {37},
  journal   = {Information systems},
  number    = {6},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0306-4379},
  doi       = {10.1016/j.is.2011.10.005},
  pages     = {518 -- 538},
  year      = {2012},
  abstract  = {This article studies the problem of transforming a process model with an arbitrary topology into an equivalent well-structured process model. While this problem has received significant attention, there is still no full characterization of the class of unstructured process models that can be transformed into well-structured ones, nor an automated method for structuring any process model that belongs to this class. This article fills this gap in the context of acyclic process models. The article defines a necessary and sufficient condition for an unstructured acyclic process model to have an equivalent well-structured process model under fully concurrent bisimulation, as well as a complete structuring method. The method has been implemented as a tool that takes process models captured in the BPMN and EPC notations as input. The article also reports on an empirical evaluation of the structuring method using a repository of process models from commercial practice.},
  language  = {en}
}