Compute average lead / quote duration

[Anonymous]

Dear Community

I have 2 sales process.

- A customer is a lead, that generates oppotunities, then a quote and an order

- A customer is requiring a quote (no lead, no oppotunity) and an order

I'd like to compute the average lead duration  = between the lead validation and order validation based on a events, or average quote duration , or opportunity to quote average duration.

Can you help me ?

Sample file :

https://drive.google.com/file/d/1SGuss45viN9LG86tF8lloSIm-2kfF9IO/view?usp=share_link