The document describes how a French software company called Theodo struggled with client unhappiness, high employee turnover, and low profits when using a traditional development methodology. They adopted agile Scrum practices but clients remained uninvolved until they switched to billing based on time spent rather than fixed price contracts. This engaged clients and improved outcomes. Theodo's success is now attributed to balancing agile Scrum practices with Lean principles while respecting clients, employees, and continuous improvement through tools like visual boards.