Step 10: Prevent Future Occurrence
Take as many of the following actions as appropriate:
Often the customer or user inadvertently did something to cause the problem. By (tactfully) giving him or her instructions on how to avoid repeat problems, the customer will perceive a better level of service and you'll free up time that would have gone to repeat repair.
By sharing your finding with your co-worker, you can save him or her hours of troubleshooting similar problems. Additionally, it's part of your Take Pride step.
Same as above. Note that some shops have databases to document this information.