An activity cycle diagram (ACD) is a graphical modeling tool to depict interactions among objects in a system.
Origin
The ACD is a modeling tool that was developed in 1960 following the flow diagram method of
K.D. Tocher. It pertains to the activity-based paradigm of system modeling, as opposed to
process-oriented or
event-based paradigms. The activity-based modeling is a natural way to represent the knowledge about a system in the activity paradigm of
discrete event simulation
A discrete-event simulation (DES) models the operation of a system as a (discrete) sequence of events in time. Each event occurs at a particular instant in time and marks a change of state in the system. Between consecutive events, no change in th ...
.
Characteristics
The activity cycle diagram is characterized by its focus on the life cycle of the components of a system, distinguishing for each component a "dead" state and an "active" state.
Implementation
In activity-based modeling, the
dynamics of system is represented as an ACD which is a network model of the
logic
Logic is the study of correct reasoning. It includes both formal and informal logic. Formal logic is the study of deductively valid inferences or logical truths. It examines how conclusions follow from premises based on the structure o ...
al and temporal relationships among the activities. An ACD is easily implemented with the activity scanning method of
simulation
A simulation is an imitative representation of a process or system that could exist in the real world. In this broad sense, simulation can often be used interchangeably with model. Sometimes a clear distinction between the two terms is made, in ...
execution.
External links
INTRODUCTION TO DISCRETE EVENT SIMULATION
MODEL DEVELOPMENT LIFE CYCLE
ACTIVITY CYCLE DIAGRAMS
SIMULATION USING ARENA
ADVANCED SIMULATION USING ARENA
SIMULATION OUTPUT ANALYSIS
Sources
Systems theory
Diagrams
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