Grinding and/or erosion machine (10) for machining a chip-cutting rotary tool including a tool body (18) and several cutting plates (19) per existing pitch (TR). A control device (25) activates an axis arrangement (11) to move a machine tool (12) and the rotary tool (13) to be machined relative to each other. An interface device (26) triggers a data import function for reading-in the position data of the cutting plates (19). The position data (P) describe at least one angular value (1, 2), a first length value (z1) and a second length value (z2). The control device (25) imports the position data (P) in chaotic order and allocates the position data (P) of each cutting plate (19) in the imported machine data set (M) to respectively one separate virtual pitch (TV), independent of whether the cutting plates (19) belong to a common pitch of the rotary tool (13).

A data processing device includes: a collector that collects setting values in operating elements that control a production process for a product at prescribed intervals and collects brand information indicating a brand of the product; a first processor that performs a statistical process for the setting values, obtains representative values for the setting values as operation performance values while the product of the brand indicated in the brand information is being produced, and generates a performance value database; a second processor that performs a statistical process for operation performance values associated with brand information indicating a next brand to be produced in the production process among the operation performance values included in the performance value database, and obtains optimal setting values in the operating elements for producing the product of the next brand; and an outputter that outputs the obtained setting values.