The Baumann Skin Type System, developed by dermatologist Dr. Leslie Baumann, was first introduced in her 2006 book "The Skin Type Solution". This system presents a more detailed approach compared to traditional skin type classifications and has been highly regarded as the importance of personalized skincare has grown.

PIE has referenced the classification method of the Baumann Skin Type System; however, the classification criteria and supporting data have been established based on PIE's proprietary scientific skin analysis algorithm.