Implication: Traditional accounting defines perfection as meeting predetermined standards. In a lean structure, empowered teams at every level within the value stream strive to continuously improve their processes so as to provide perfect, high-value products and/or services to their customers. Improvement is not driven by projects; this continuous improvement is relentless and permanent. The accounting and measurement systems need to actively support the quest for perfection. They must provide timely, valid, and understandable information to provide control and motivate continuous improvement. More in-depth discussion of these lean principles can be found in Lean Enterprise Fundamentals.