I have a solution to prevent this, which doesn't prejudice Mike for having a bit of weed 2 weeks ago camping. Also it will filter out those unfit to work from legal medication, or tiredness.
Make workers do a 30 second ability test before going on shift. Design the test to measure reaction speed, short term memory, etc.
[follow up thought] - Test must be immune to practice/muscle memory. Don't want a drunk passing the test through familiarity, then performing shit on the job.
Make workers do a 30 second ability test before going on shift. Design the test to measure reaction speed, short term memory, etc.
[follow up thought] - Test must be immune to practice/muscle memory. Don't want a drunk passing the test through familiarity, then performing shit on the job.