I accepted an invitation to speak at a lean conference in Monterrey Mexico on September 6th and 7th. I delivered the opening keynote and two workshops all on the topic of 4 Types of Problems. The book will be published in a couple more months (I hope) by the Lean Enterprise Institute. I will post updates as soon as I am informed of any release dates. In the mean time for those who attended the conference I promised to post the main files on-line. Below are links to the two files.