Use of the ppm and its function in the production process

Today's market environment in both engineering and non-engineering industry considers an indicator ppm as one of the most important regarding the evaluation of the efficiency of their processes. This paper describes what the ppm represents and what to use his dimensionless value that describes it for. There is explained how the ppm should be properly used by the customer, as well as how a supplier should work with those requirements of the customer This paper will also concern the other alternatives of evaluation of an industrial process, the process eligibility, its target values and setting of specific boundaries in order to become noncritical and the derived ppm fulfil customer requirements. Finally, it shows an example of the use of all connections with the ppm described in the contribution.