Many companies are struggling with the question, how can sustainability reporting assist in decision making process and continuous learning. This development-oriented case article explores what systematically repeated assessments and written explanations reveal about sustainability work — and how that knowledge could be utilized as a support of organizational renewal. The case study highlights the difficulty of understanding what lies behind the sustainability reporting: how the reporting affects the RDI project itself within time, what is to be learned, and how the results could affect future projects.