well checklist or not being able to correct comes with experience and playing with settings if you see higher hash rate than you expected(by atleast 20 - 30 percent) there can be some algo issues or miner is outdated even driver issues they can all have their signs.
for example check miner's github and see if it fixes some issues in the algo you are mining right now in its log
also try using hiveos farm os for mining it has watchdog that will restart miner or rig itself if hashrate be lower than what you specify for it based on time it being off, its free until 4 rigs.