Petri nets provide a formal framework for system modelingand validation which has proven to be very reliable inpractice. This book presents variousnet models appropriatefor designing specific systems, where systems are understoodvery generally as "organizational systems" in whichregulatedflows of objects and information are significant.

1 Principles of System Design with Nets.- 1.1 An Example.- 1.2 Passive and Active Components.- 1.3 The Change to Dynamic Behavior.- 1.4 Relationships Between Net Representations.- 2 Condition-Event Nets.- 2.1 An Example.- 2.2 Rules.- 2.3 Conflicts.- 2.4 Contacts and Their Avoidance Through Complementation.- 2.5 Processes of Condition-Event Nets.- 2.6 Further Examples.- 3 Place-Transition Nets.- 3.1 An Example.- 3.2 Arrow Weights.- 3.3 Rules.- 3.4 Contacts and Their Avoidance Through Complementation.- 3.5 Further Examples.- 4 Individual-Token Nets.- 4.1 An Example of Constant Arrow Labels.- 4.2 Rules for Nets with Individual Tokens and Constant Arrow Labels.- 4.3 Further Possibilities for Constant Arrow Labels.- 4.4 An Example of Variable Arrow Labels.- 4.5 Rules for Nets with Individual Tokens and Variable Arrow Labels.- 4.6 Further Possibilities for Variable Arrow Labels.- 4.7 Individual-Token Nets.- 5 Channel-Agency Nets.- 5.1 An Example.- 5.2 Rules.- 5.3 Further Examples.- 6 Refinement and Embedding.- 6.1 Refinement.- 6.2 Token-Preserving Refinement.- 6.3 Embedding.- 7 Nets as a Design Method.- 7.1 Preliminary Considerations for the Design of Computer-Integrated Systems.- 7.2 An Example.- 7.3 The Switch to Other Net Models.- 7.4 Additions to the Example.- Solutions.- References.