The term “platform height” refers to the height of the tower, i.e., the height at which you can physically stand on it.
“Working height”, on the other hand, is the estimated reach based on the person using the equipment.
The working height is defined as 2 m above the platform height. It is a standard practice in the access industry. This standard will help you to compare different products and get the right one for your needs without engaging in dangerous solutions.