Module 24: Software Architecture

MODULE 24 · 3 LESSONS

Evolve a modular system with clear boundaries, recorded decisions and manageable failure modes.

Project checkpoint: Write the CourseFlow architecture decision record and scaling plan.

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Module 24 learning loopA four-step visual showing cohesion, coupling, modules, service extraction.Module 24 learning loop1Cohesion2Coupling3Modules4Service Extraction

Module 24 learning loop

  1. 1Cohesion
  2. 2Coupling
  3. 3Modules
  4. 4Service Extraction
Module 24 learning loop: a practical sequence used in this lesson.

What this module changes in your work

  • Start with cohesive modules and explicit interfaces before paying distributed-system costs.
  • Integrate the entire course into a secure, tested and deployable learning product.
  • Use cohesion, coupling, modules in one coherent implementation.
  • Complete this evidence-backed checkpoint: Write the CourseFlow architecture decision record and scaling plan.

Lessons

PROJECT CHECKPOINT

Turn software architecture into evidence

Write the CourseFlow architecture decision record and scaling plan.

  • Write acceptance criteria for cohesion before implementation.
  • Keep the change small enough that a reviewer can connect it to the intended behavior.
  • Use the most direct check available for coupling and save the result.
  • Record one decision you would keep and one you would revisit after feedback.

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