United States of America for productivity techniques and methodologies and Lean Management development.   
 
The PRODUCTIVITY Inc. consultants have provided integrated consulting and training services to almost every Fortune 500 company.
 
Productivity Inc. provides everything you need for Lean:

CONSULTING AND TRAINING: Productivity consultants assist and help their customers in the development of their own Lean Roadmap. They tailor and implement Lean tools to meet the strategic goals of their customers and train employees in Lean techniques in order to get real and long lasting results.

LEARNING TOOLS: Productivity designs and develops first class training material to involve all employees in the Lean process. Productivity's Learning Tools are complete, award-winning packages to educate, motivate and train the workforce: videoapes, CR-Rom, multimedia programs... 

CONFERENCES AND PUBLIC EVENTS: Productivity has been developing for over twenty years complete and structured workshops designed around practical applications on the job on all the different Lean methodologies and approaches. In addition to these ongoing events, our annual Lean Management and TPM Conference is a major event in the US which gives participants the opportunity to interact with leading industry practitioners, consultants and business executives. 
   
PRODUCTIVITY PRESS: Productivity Press was the first American company to publish the Japanese manufacturing techniques. Today, Productivity Press provides the mosut up-to-date and compelling books on the Lean theory and practice and other productivity improvements.