Fitness functions
On This Lesson 4 topics
This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.
In this lesson
define fitness functions that express important qualities as checks.
Planned topics
- A fitness function measures one architectural quality: performance, coupling, security, cost, or operability.
- Good ones are specific, have a threshold, and an owner who acts when it fails.
- Pick qualities tied to business goals, such as checkout latency or cost per order.
- Few, meaningful functions beat dozens nobody reads.
Draft outline details
Demonstration
a table with five rows: quality, measure, threshold, owner. For example, coupling: "no domain depends on another domain's internal packages", threshold zero violations, owner domain team.
Check your understanding
What four things should every fitness function name?
Show answer
The quality, the measure, the threshold, and the owner.
Practice
Apply this lesson with the module's lab, exercises and quiz.
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