The Voice of the Process


Moran, John W.; Duffy, Grace L.   (ASQ; Moran, John W.; Duffy, Grace L.)   Public Health Foundation

   Vol. 66    No. Anaheim, CA
QICID: 34956    May 2012    pp. 1-6
List $10.00
Member $5.00

You will need to be signed in.
New to ASQ? Register here.

Article Abstract

The Voice of the Process (VOP) is how the process communicates with the organization on performance against customer needs and expectations. This communication takes place through process measures which are descriptors of how the process is performing in its current state. It is critical to understand how the current state is operating to define a baseline before attempting any change or improvement activities. It is important not to change a process before understanding where performance is centered or the amount of variation currently present. The most common statistical measures of a process are mean and standard deviation. Once these measures have been calculated, conducting a capability study is possible. A capability study measures the number of standard deviations between the process mean and the nearest specification limit in sigma units. In general, as a process’s standard deviation rises, or the mean of the process moves away from the center of the tolerance, fewer standard deviations will fit between the mean and the nearest specification limit. This proximity to the upper or lower limits of tolerable range increases the likelihood of items outside specification, allowing more errors to occur.


Process capability; Process improvement; Customer satisfaction; Voice of the customer; Measurement; Customer requirements; Process performance

Browse QIC Articles Chronologically:     Previous Article     Next Article

New Search

Featured advertisers

ASQ is a global community of people passionate about quality, who use the tools, their ideas and expertise to make our world work better. ASQ: The Global Voice of Quality.