alguidelines/content/docs/NAVPatterns/3-cal-coding-guidelines/design/class-coupling/index.md

+++ title = "Class Coupling" weight = 320 +++ Do not write functions that have high class coupling. This makes the code hard to maintain.

Bad code

Any procedure / trigger that has class coupling of > 30  

Good code

Any procedure / trigger that has class coupling of <= 30\.
Class coupling is computed by summing the unique instances of the following in a code block:
- every unique usage of a complex C/AL data type (table, codeunit, etc) as 1\.
- every unique usage of a DotNet type as 1\.