In the production of pizza, which of the following four variables is not aninput variable?a. The amount of dough prepared for the pizzab. The temperature of the ovenc. The type of cheese on the pizzad. The time that the customer leaves the pizza in the refrigerator

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A: The answer is as below:

Statistical Process Control

The use of statistical methods to observe and manage a process to make sure that it operates at its full potential and thus produce a confirming product is called Statistical Process Control.