Do you know PowerBI case studies?

Hello,

I'm searching PowerBI for persuade all my organization to change to Power BI.

I only found a blog post with 10 case studies, but they are very short and without data. (For example the revenue of the EXAMPLE INC increase 20% or something similar).

The blog post is from:

http://www.cio.com/article/2368862/business-intelligence/156609-10-microsoft-power-bi-for-office-365-success-stories.html

Regards,