On 6th of July, a refreshed version of the Scrum Guide was released in a live webinar by Ken Schwaber and Jeff Sutherland.
The refresh basically consists in adding the Scrum values into the guide, the values as they were featured in the last chapter of the first book on Scrum (Agile Software Development with Scrum). Ken and Jeff identified these values while working at Patient Keeper and consider them to be very important to a successful Scrum adoption in companies.
You can watch the webinar below:
Some references from the webinar:
* Jeff mentions a study of 70,000 Scrum teams where the speed of delivery was measured. Two links related to this are mentioned in the comments: * [Quantifying the Impact of Agile Software Development Practices](https://www.infoq.com/articles/quantifying-impact-agile) * [The Impact of Agile. Quantified.](https://www.rallydev.com/sites/default/files/ImpactofAgileQuantified2015.pdf) * Ken mentioned an article written for Harvard Business Review magazine called [Embracing Agile](https://hbr.org/2016/05/embracing-agile)