The present invention relates to methods and systems for applying evolutionary algorithms to generate robust search strategies for problems including decision variables. The machine comprises a base, a headstock and a tailstock supported by the base for mounting respective ends of the workpiece such that it is rotatable about said longitudinal axis, and a carriage for carrying a tool to engage with the io workpiece. The line model setting unit sets linear line model information input from the panel for the macro information set by the macro information setting unit, and records the set line model information and macro information in the storage unit in correspondence with each other. Consequently, the second symbolic layout can be reused.