Answer is Lesson Leaned to be well record!

Why?

Keep good record of lesson learned for following reasons:

1. Do not follow wrong things happened in the past.

2. Act as training materials

3. To be assest to company for competition edge.

4. Sharing knowledges among colleagues so that every one is growing up in his skills and mindset.

5. Record to be acting as case study presenting to potential Client to win a project!