There is a growing interest of assessment approaches in manufacturing companies, and a wide range of assessments of progress and performance of production systems are found in literature and industry. The purpose of this paper is to investigate potentials of an assessment approach for production systems, developed within a larger automotive company in Sweden. The approach presented include assessors and practitioners experiences involved in the development process, during a pre-development phase and their reflections from sharp runs at plants in Europe, North America, South America, and South East Asia. The methodology studied is regarded as a self-assessment on a higher organizational level. Results identify benefits of the assessment approach according to its contribution to global cross-organizational learning and potential learning within individual plants. However, the assessment process highly effect the type of outcome and benefits.