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Simulation

Discrete event simulation is the set of logical, mathematical, and probabilistic relationships that integrate the behavior of a system under study when a given event occurs

System

Entity

Attribute

It’s an object of interest in the system.

It’s an entity property.

Activity

State of a System

The collection of variables needed to describe the system at any time.

Event

It is defined as an instantaneous occurrence that can change the state of the System.

It represents a specific time period. (It is a property of an entity).

Disadvantages of simulation

Simulation is not an optimization tool.

can be expensive when you want to use it on relatively simple problems

It takes a long time and not all analysts are willing to wait that long to get feedback from the system.

Analyst must master use of simulation package and have solid statistical knowledge to interpret the results

Sometimes customer may have false expectations of simulation tool and be related to conditions like a predict future.

advantages of simulation

It is a good tool to know the impact of the changes in processes, without to carry in reality.

It improves the knowledge of the current process and allows analyst to see how generated model behaves under different scenarios

can be used as a means of training for decision-making

It is more economical to do a simulation study than to make many changes in real processes.

It allows to test several scenarios in search of the best working conditions

In complex problems, the simulation allows you to generate a good solution.

the simulation software packages are simpler

These animation tools are part of many packages it is possible to see how a process will behave when it is improved.

Simulation of discrete event systems

In a system of discrete events, one or more phenomena of interest change value or status at discrete points in time, rather than continuously over time.

State changes in a model occur when an event happens.

A simulation of discrete events is when state changes occur at

discrete points in time as triggered by events.

is a set of elements that interrelate to function as a whole; (from a simulation point of view, the elements must have a clear boundary)

Salma Abigail Bautista Ortiz