ABT emphasis on Strength, Opportunities and Challenges instead of Weaknesses, Threats and Problems.
Toyota Culture celebrates mistakes and view it as opportunities to improve. Read the experience of Micheal Hoseus in "Toyota Cultiure" ("I mess up" p.27). Yearly, the collected almost 2 millions suggestions to improve their sytem. They adopted 90% of the suggestions form employees
Toyota places challenges as one of the supporting pillar in Toyota Way 2001 (p.xxviii).
The Human Systems Model of Toyota has a qualiry people values stream mapping to develop the strength of their people from attracting talents to inspiring talents.
I urge for those who intent to implement lean culture to read Asset Based Thinking to engineer the changes of the people development.