1. Ownership Rule – the person who first detects the problem is responsible for finding the root cause of the problem.
2. Quickly Rule – the problem must be dealt with and solved within 30 minutes, not put on a list or in a report for action at another time.
3. Actually Rule – if possible play back or recreate the process that occurred before the defect.
4. Support Rule – the person who detects the problem has primary responsibility for solving it, but supervisor and fellow workers can stop working and lend problem solving support.
5. Shut Up Rule – the discoverer is expected to solve the problem and be allowed time to discuss the problem and attempt to solve it. Others can help but the supervisor or manager must keep quiet and give the person a chance to solve the problem.
From Dr Ryuji Fukuda