Ron Jeffries is author of Extreme Programming Adventures in C#, the senior author of Extreme Programming Installed, and was the on-site XP coach for the original Extreme Programming project. Ron has been involved with Scrum, Extreme Programming, and Agile for over ten years, presenting numerous talks and publishing papers on the topic.
Ron is the proprietor of www.XProgramming.com, a highly-ranked source of Agile Software Development information. He was one of the creators, and a featured instructor in Object Mentor's popular XP Immersion course. Ron is a well-known independent consultant in Scrum, XP and Agile methods, recently specializing in helping Scrum teams get Done-Done.
Ron is one of the original authors of the Agile Manifesto.
Articles I've written
Scrum, Technical Practice, and the CSD
Before we joined the dark side and became Certified Scrum Trainers ;-), we spent much of the previous five years working with Scrum teams that found they weren't able to meet their commitments. The story was usually the same: the end of the sprint came and the development team hadn't finished all the work they had promised. They had tried...