I have created design concepts but i am having problems evaluating I dont know where to start and what methods I should use

Assessment Task: Automatic Touchless Hand Sanitizer Dispenser Now almost every shop in UK provide hand sanitizer or hand soap to public. The problem is people still use hand to touch the handle all the time, it can spread the coronavirus. The are some auto soap dispenser selling on the market, but they all use their own soap which is quite expensive. This project is to design a kit which can be used on common hand sanitizer bottle. It will include a sensor, a motor, an actuator and a batter pack. Your task in this first assignment is to perform a thorough research into current auto soap dispensers in order to select and determine customer requirements for an auto soap dispenser. The outcome of this research should be summarised in the form of a product design specification (PDS) which specifies specific values or descriptions for the customer/end user requirements. Using the PDS, a series of design concepts should be developed and evaluated