Coming back to "Sustainability" it may be relevant to look at ISO 14000 on the environment. Also the guidance on ISO 9000 uses the same word or is heading that way. See ISO website as a starting point.

The Deming SIG is not yet ready to launch the documents on a sustainability model but meetings continue. Next one probably in June, details will be on the website.

There could be more dialogue with academics. Plan - Do - Check/Study - Act is arguably a learning cycle.