Mary Poppendieck’s first job was programming the #2 Electronic Switching System at Bell Labs in 1967. She has worked on systems that control roll-goods processes, interpret digitized images, and support statistical process control. She spearheaded the implementation of a just-in-time production system and led new product development teams, commercializing products ranging from digital controllers to lighting systems. Mary is a popular writer and speaker and co-author of the book Lean Software Development: An Agile Toolkit, which was awarded the Software Development Productivity Award in 2004. A sequel, Implementing Lean Software Development: From Concept to Cash was published in 2006. A third book, Leading Lean Software Development: Results are Not the Point was published in November 2009, and a fourth book, The Lean Mindset: Ask the Right Questions was published in 2013.