Module 3: Boundaries

Overview

In this module, you'll learn to define what's inside your system vs. what's outside (the environment). Understanding boundaries is crucial for clear ownership, risk management, and integration planning.

Learning Objectives

By the end of this module, you'll be able to:

• Define system boundaries clearly
• Model internal vs. external components
• Identify and document dependencies
• Create bounded contexts for services
• Plan integrations at boundaries

Lessons

• Lesson 1: Understanding Boundaries - What boundaries are and why they matter
• Lesson 2: Internal vs External - Differentiating and marking boundary elements
• Lesson 3: Crossing Boundaries - Modeling integrations and dependencies

Prerequisites

• Completed Module 2: Parts and Relationships

Time Investment

Approximately 1-1.5 hours to complete all lessons and exercises.

What's Next

After completing this module, you'll learn about Module 4: Flows.