Agent

Definition #

An autonomous computational entity designed to emulate human-like behavior, perception, and decision-making within a simulated environment.

Role: It is the individual actor inside a simulation.

The Problem That Led to It #

Real-world systems contain many individuals who perceive situations, make decisions, and act differently. Treating everyone as one large group hides this individual behavior.

What Problem It Solves #

An agent represents an individual entity so we can model its:

Perception → Decision → Action

What Happens If Not Used #

We cannot easily represent individual decision-making and interactions between individuals.

Easy Wording #

An agent is a digital actor that can perceive, decide, and act.

Layman Example #

A person in a city:

Sees a job opportunity → decides whether to apply → applies.

Technical Example #

Environment ↓ Agent perceives information ↓ Agent makes decision ↓ Agent takes action ↓ Environment changes

Limitation #

A single agent only represents an individual actor. To study how many actors collectively affect a system, we need ABM.

Solution #

Agent-Based Modeling puts multiple agents together and studies their interactions.