quality control loops

From the production site Salzgitter of the MAN Nutzfahrzeuge AG CKD-sets (Completely Knocked Down) for trucks and bus chassis are sent to a global production network. In the receiving countries the CKD-sets are assembled with support of MAN. The main chances of the CKD- production are the exploitation of new markets and the increase of competitiveness. The CKD production was traditionally attached to the business unit logistics. Since 2009 it is an integral part of the production at the MAN Nutzfahrzeuge AG. This allows to adapt the “lean principles”, which are used in the local production lines, much more easily. Hereby it is possible to react to the high requirements of the production and logistics processes in the CKD production. In this paper special requirements of the CKD production and solutions will be shown. The main focus is on approaches to process optimization within the production network and the transfer of lean management methods from the field of production in the ...

Metrology supplies valid information about the production. Utilized in control loops metrology often is the enabler to a capable production. Benefits in terms of a contribution to the production’s value added is generally unknown. This paper answers the question how the use of or investments in metrology can be rationally justified - not only on the basis of a cost minimization, but as an assessment of production performance due to measurements. A decision-theoretical model comparing the deployment of metrology with compared to an abdication of measurements enables the necessary quantification of the benefits. Embedding the decision model in quality control loop shows that the feedback of measurement information leads to a considerable process improvement.