Introduction to Process Control Charts

Donald J. Wheeler, PhD is a world-renown expert in continuous
improvement, having worked with W. Edwards Deming and later writing
the classic book Understanding Variation. Wheeler once wrote and
said, Statistical Process Control is, at its heart, about getting
the most from your processes. It is about the continual improvement
of processes and outcomes. And it is, first and foremost, a way of
thinking... with some tools attached.