Method for identifying print control elements in the form of colour measurement strips for obtaining data on quality, comprising the following steps of • encoding specific information on the position of the print control element as text in a four-part identification code , said specific information in the form of a relative position and a side of the printing substrate, information on the position of the print control element on the printing substrate in a zone transverse to the printing direction and information on the position of the print control element on the printing substrate in an order from the print start along the printing direction as well as the type of measurement device to be used • encoding specific print job information and the identification code as a bar code into a data code • positioning the data code and the identification code next to the associated print control elements thereof on the printing substrate • photographing the printed print control element and the adjacent machine-readable data code by means of the information of the adjacent identification code in that a machine operator obtains information on how to photograph the control element from the identification code , and processing the data using a mobile communication device that has a camera function and a communication interface • exporting the generated image data to a support computer via the communication interface of the mobile communication device • decoding the machine-readable data code • analysing the image data on the support computer by means of the information obtained from the decoded machine-readable data code • forwarding the results of the analysis from the support computer to the mobile communication device and presenting the results of the analysis via the graphical user interface of the mobile communication device • correcting the faulty settings found as a result of the analysis of the image on the printing machine that produces the printed products in that the machine operator makes corrections • encoding specific information on the position of the print control element as text in a four-part identification code , said specific information in the form of a relative position and a side of the printing substrate, information on the position of the print control element on the printing substrate in a zone transverse to the printing direction and information on the position of the print control element on the printing substrate in an order from the print start along the printing direction as well as the type of measurement device to be used • encoding specific print job information and the identification code as a bar code into a data code • positioning the data code and the identification code next to the associated print control elements thereof on the printing substrate • photographing the printed print control element and the adjacent machine-readable data code by means of the information of the adjacent identification code in that a machine operator obtains information on how to photograph the control element from the identification code , and processing the data using a mobile communication device that has a camera function and a communication interface • exporting the generated image data to a support computer via the communication interface of the mobile communication device • decoding the machine-readable data code • analysing the image data on the support computer by means of the information obtained from the decoded machine-readable data code • forwarding the results of the analysis from the support computer to the mobile communication device and presenting the results of the analysis via the graphical user interface of the mobile communication device • correcting the faulty settings found as a result of the analysis of the image on the printing machine that produces the printed products in that the machine operator makes corrections <EOS>