Use the P-graph framework to design supply chains for sustainability

Heriberto Cabezas, István Heckl, Botond Bertok, Ferenc Friedler

Research output: Contribution to specialist publicationArticle

16 Citations (Scopus)


The use of the P-graph (process graph) framework together with sustainability and profitability considerations for the design of supply chains is discussed. A P-graph contains two types of nodes, nodes for materials (Ms) and nodes for operating units (Os). The lines between the nodes signify that a material is input to or output from an operating unit. The input and output materials are consumed or produced according to the rates stated on the lines leading to and from the respective operating unit. The P-graph methodology cannot be successful without powerful software tools to model, draw, and solve PNS problems. While networks for small problems can be constructed manually, doing so for a moderate-sized problem is a time-consuming and error-prone undertaking. PNS Studio was created to address these issues and assist in building a problem from scratch or modifying an existing model. PNS Studio users do not have to deal with errors such as mistyping the name of an input material accidentally deleting a material that is used by an operating unit. Within the P-graph methodology, the cost of a network is the sum of the costs of the materials and the costs of the operating units.

Original languageEnglish
Number of pages7
Specialist publicationChemical Engineering Progress
Publication statusPublished - Jan 2015


ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering
  • Materials Chemistry

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