Voice of process

Voice of process (VOP) is the performance of a process over a time period. The upper and lower limits can be plotted on process control charts, histograms etc. showing the difference between the voice of customer and the voice of process. This plotting with the VOC has two conditions:
* Voice of process is inside the voice of customer, this means that the process is going well.
* Voice of process is outside the voice of customer, this means that the process has many wastes and may require an improvement project.
Understanding the process
Produced parts attributes include maximum and minimum, average, deviation, observation that lies an abnormal distance from other values. The limits of the manufacturer's abilities can be extracted from the voice of process. If the plant is making products with a typical weight between 10 and 15 kg. This is called voice of process. The voice of process could be acceptable to the buyer or not. Statistical process control is a type of voice of process. While making the voice of process designer should consider the voice of customer.

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