General prefixes:
* Non-standard: Indicates something that deviates from the standard.
* Substandard: Indicates something that falls below the standard.
* Superstandard: Indicates something that exceeds the standard.
* Hyperstandard: Indicates something that is extremely high standard.
Specific prefixes based on fields:
* Industry standard: Widely accepted practices in a particular industry.
* De facto standard: A standard that has become widely adopted, even without formal approval.
* Gold standard: The highest standard or benchmark.
* Best practice: A generally accepted method or procedure.
Other options:
* Pre-standard: A proposed standard that has not yet been adopted.
* Post-standard: A standard that has been updated or replaced.
The best prefix to use will depend on the specific meaning you want to convey.