Master measuring processes to minimize quality unit costs

Current trends of measurement technology concern analyzing process capability.
In this context, the Bosch booklet 10 is to be mentioned as an important guide. This includes descriptions like the procedure of %GRR methods, which just allows 1/40th of the tolerance as a variation between repeating individual measured value. E.g., a tolerance of 1 µm will be no more than 14 nanometers. This in turn leads to more multi-axis machines by at least a minimum level of reduced influence of the user in the history of measurement technology development.


  • A greater measuring security through automation with multi-axis measuring machine
  • A greater measuring accuracy through a minimal of user influences
  • A greater measuring accuracy to advance adjusting processes through SOT/SOP
  • This main failure of measuring substantially influences the closed loop! A successful closed loop is determined by the quality of measuring! (Process ability of measuring technology)


Link between measured values of various production steps

  • Assessment of the process status
  • Visualization for measuring technique in the control station
  • Rules of the adaptive scope of testing and/or
  • Adaption of the control tolerances for the next production steps aiming a reduction of control cost/overhead costs

Closed loop as the control of the producing machine through the results of the measuring station is already state of the art. Most important is that a stable connected measuring process operates without any outlier effect. Otherwise the process will be “uncontrollable”. In the future, closed loop will be focused on the combination of processing machine vs. measuring station.