Synthesized answer
The provided passages do not contain the answer to what questions remain unanswered. The passages mention a guide on Statistical Process Control and cite articles by W. Edwards Deming related to quality and productivity [1]. However, they do not list any specific unanswered questions from the book "Quality, Productivity, and Competitive Position."
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: Statistical Process Control by Berger Description: This guide aims to strip away the mystery surrounding statistical process control and to present its concepts and principles in as simple and straightforward a manner as possible. It is directed primarily at American business managers. Categories: Science Pages: 86 Snippet: ... <b>Quality</b> Control , May 1959 , pp . 2-6 W. <b>Edwards Deming</b> . " Improvement of <b>Quality</b> and <b>Productivity</b> through Action by Manage- ment . " National <b>Productivity</b> Review , Winter 1981-82 , pp . 12-22 W. <b>Edwards…