Porcelain Tile Crack Analysis

I need a skilled professional to determine the cause of cracks in my porcelain tiles. These tiles, located in my living room, were installed more than 5 years ago. I am seeking a solution within this month. The ideal freelancer should have:
- Expert knowledge in porcelain tiles, installation, and detection of issues
- Experience in troubleshooting and identifying causes of cracks
- Ability to provide a detailed report with findings and proposed solutions.