Some people are very passionate about lean manufacturing, so passionate that people recognize them for that. The lean journey is so tough that even for that people is close to impossible to be successful on their lean journey if they are the only driven factor.
For a successful journey, we need more than one person with lean knowledge. I found a couple of plant managers that believe that having one person with the words lean manufacturing on his/her title is the first step for the lean transformation. This person would be dedicated to the lean manufacturing implementation, through training and kaizen events facilitation. It is also expected that this person will do everything on its own and that is the first mistake. Change attitudes and thinking ways is not easy, there are so many things that need to take care of, so much coaching, follow-up, training, facilitation, learning, and preparation. Without the resources or the authority to make it happen, the lean transformation is not feasible.
Every lean transformation effort needs a strong leader with the authority to make things happen, someone who can take bold decisions, somebody that the people will follow and respect. This person does not need to be a lean expert, just someone who believes in lean and has the power to change things. Of course, he or she will need resources that will introduce lean concepts to the whole organization beginning with the managers. Authority without knowledge or knowledge without authority, either one of them will not work.
I have seen people in the position where he or she is the person with the knowledge but no authority to make or force changes. That is an awful position, never hire or pointed someone to implement lean if you do not intend to give he or she the authority to make decisions and change things or you if do not plan to be there 100% of the time supporting the transformation, taking those decisions and changing things yourself. People will think the change is optional when is not and even when this person is very passionate, know a lot about lean and has the skills to coach and facilitate changes; pretty soon the plant will go back to its old ways. Without support, it is impossible to make this journey.