14. A control unit for a laser machine tool, the control unit having a dialogue system for examining a laser cutting operation which is carried out on the laser machine tool to establish a proposal for improving at least one quality feature of a subsequent laser cutting operation, the dialogue system comprising: input means through which an operator can identify the quality feature that is to be improved; and a proposal module that is configured to access stored expert knowledge, and to provide at least one proposal for improving the quality feature, wherein, to provide the at least one proposal, the proposal module is further configured to read data provided from a sensor system of the laser machine tool and image data of at least one laser cut edge of a processed metal sheet together with associated metal sheet material and processing data.
14. A control unit for a laser machine tool, the control unit having a dialogue system for examining a laser cutting operation which is carried out on the laser machine tool to establish a proposal for improving at least one quality feature of a subsequent laser cutting operation, the dialogue system comprising: input means through which an operator can identify the quality feature that is to be improved; and a proposal module that is configured to access stored expert knowledge, and to provide at least one proposal for improving the quality feature, wherein, to provide the at least one proposal, the proposal module is further configured to read data provided from a sensor system of the laser machine tool and image data of at least one laser cut edge of a processed metal sheet together with associated metal sheet material and processing data. 15. The control unit according to claim 14 , wherein the control unit is constructed such that automatic adaptation of at least one control program of the subsequent laser cutting operation can be carried out based on the proposal established for the subsequent laser cutting operation by means of the dialogue system.