This volume contains the proceedings of the 14th International Conference on Application and Theory of Petri Nets. The aim of the Petri net conferences is to create a forum for discussing progress in the application and theory of Petri nets. Typically, the conferences have 150-200 participants, one third of whom come from industry, while the rest are from universities and research institutions. The conferences always take place in the last week of June. The previous conferences were held in- Strasbourg, France (1980), Bad Honnef, Germany (1981), Varenna, Italy (1982), Toulouse, France (1983), Aarhus, Denmark (1984), Espoo, Finland (1985), Oxford, United Kingdom (1986), Zaragoza, Spain (1987),
Venice, Italy (1988), Bonn, Germany (1989), Paris, France (1990), Aarhus, Denmark (1991), Sheffield, United Kingdom (1992).