The present invention relates to defining a model used for automatic control of a mobile mining machine (1), wherein the model is defined of a production area environment and/or route of the mining machine (1) in the production area in a computer-aided manner with a model definition application. The definition of said model is arranged as a route definition process comprising several steps that are executed in a predefined order. This means defining (51) according to predefined step-wise definitions the actions allowed in the current step of the model definition process; displaying (52) to the user,information defined to be displayed for the current step according to predefined stepwise definitions;executing (53) automatically at least some of the functions related said model definition step according to the predefined stepwise definitions;and allowing (52) a user to select only actions allowed in said step and to move only according to the predefined order to an allowed model definition process step.