Final answer:
True, Deming emphasizes that dispersion is a key factor in determining if a process is in control, with consistent dispersion indicating predictability and adherence to quality standards.
Step-by-step explanation:
According to Deming, to speak about a process being in control, it is indeed necessary to speak about dispersion. Dispersion refers to the spread of data points in a process. Deming's philosophy stresses the importance of reducing variation to achieve a state of statistical control within a process. A process that is in control will exhibit a consistent level of dispersion over time, indicating predictability and the ability to meet quality standards. Therefore, understanding and controlling dispersion is crucial to ensure a process is in control.