The present invention relates to a method for generating control data for controlling a shoe part production machine for making shoes or elements for optimizing traction properties of the shoe by customizing modules to be mounted on the sole for a specific user, said method comprising the steps of: receiving user profile data describing the characteristics of the user where the user profile data comprise use data and test data, receiving a user selection identifying a selected shoe from a number of shoe models or a selected element influencing the property of a shoe, generating modified template data by modifying a shoe sole template corresponding to the selected shoe model or by modifying an element influencing the properties corresponding to the selected element, said modifications being performed based on said received user profile data, generating control data based on said modified template data.