ID	FCNS-11
Title	Functions should do precisely one thing well, and encapsulate a single idea.
Priority	Strongly recommended
Severity level	4
Description	Single responsibility principle : all sub-functions and most functions should do one thing very well, and encapsulate a single idea.
Rationale	The single responsibility principle makes code more readable, modular, and testable. Multi-purpose functions can often be split up into atomic units which are called on the input data in sequence. Functions should not try to be all things to all users.