What word indicates that a procedure is recommended?

The word "should" is used to indicate that a procedure is recommended, suggesting a strong preference or advice for a certain action to be taken, while still allowing for the possibility of alternatives. It implies that following the procedure is advisable based on best practices or expert opinion, though it does not imply an absolute requirement.

In contrast, "must" indicates a requirement or obligation that must be followed without exception. "May" suggests permission or the possibility for an action but does not imply that it is recommended. "Can" denotes ability or capability, which does not convey any indication of recommendation. Therefore, "should" effectively balances the necessity and flexibility of guidance, making it the appropriate term for indicating a recommended procedure.