Correcting errors/root cause analysis

Mistakes happen, that is normal and perfectly acceptable.

The same mistake happening again is not acceptable.

There are many well established techniques for preventing the same mistake happening again. I like the sites below. Remember these key points

• Processes fail, not people.
• back to standard fixes are just fire fighting. e.g. fix a puncture
• improving the standard is what you want. e.g. puncture proof tyres, new route with less debris.

The 3Cs - Cause, Concern, Corrective actions 5W - Five whys
http://www.panview.nl/en/lean-production-lean-toolbox/practical-problem-solving-3c-5w
https://en.wikipedia.org/wiki/5_Whys

Fish tail Diagrams (Ishikawa Diagram)
https://en.wikipedia.org/wiki/Ishikawa_diagram
These can be really good when more than one contributing factor is present.

Finding waste
http://www.panview.nl/en/lean-production-toyota-3m-model/finding-muda-waste-your-process 
The more steps you have, the more processes, the more opportunity for failure. Remove the waste, make your processes lean and there is less opportunity for failure to occur.