Abstract: The present disclosure generally relates to a computer system adapted to determine how well user manipulation of a first object using a second object is complying with a predefined task to be performed in relation to the first object. This in line with the present disclosure achieved by applying a machine learning based object processing scheme to determine a state of the first object when the user has manipulated the first object using a second object, and compare this state with data defining processing steps to be performed for completing the predefined task. The present disclosure also relates to a corresponding computer implemented method and a computer program product.