A Primer in Petri Net Design

Petri nets provide a formal framework for system modeling and validation which has proven to be very reliable in practice. This book presents variousnet models appropriate for designing specific systems, where systems are understood very generally as "organizational systems" in which regulatedflows of objects and information are significant. The models are interrelated in the sense that they have common interpretation patterns: together they can be understood as a method for specifying any given system or any section of such a system to any given degree of refinement. The simple and immediately understandable principles of system modelling with nets makes it possible to provide an illustrated description of this method without going into the mathematics behind it. The text is based on courses the author developed for project engineers and project managers in the area of embedded computer systems.

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.