engleski

Assessing print production process capability

Process capability refers to the proportion of units conforming to specification that a process is able to produce. In print production, process control standards specify aimed and tolerance values for specific process control parameters. However, producers and customers have to agree on the acceptable quality level (AQL), i.e. tolerated proportion of nonconforming units. In order to agree on the AQL, the producer has to know the capability of his process. In addition, process capability can be determined in a number of different ways, depending on how the data is collected and analyzed. The experiment presented in this paper shows how different ways of data analysis affect the assessed process capability. In order to avoid confusions and arguments between producers and customers, it is necessary to agree on the way of data analysis (determination of proportion of waste). This part is not covered by process control standards as they can only serve to determine whether a given unit conforms to them or not.

print production; process capability; process control

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