Over the past 15 years, ‘platform of values’ texts presenting core values have become common in most Swedish public authorities. This article presents a study of how this genre is understood and used in professional practices. The aim is to show how semiotic vagueness in such texts serves a number of previously under-researched purposes in public organizations, including, rather paradoxically, concrete goal achievement. The framework of critical genre analysis enables the analytical process to move from text to practice, and further to the superordinate level of professional culture. Three different data sets are analysed: 47 ‘platform of values’ texts; a focus group discussion with seven senior civil servants/managers; and a quantitative questionnaire study answered by civil servants from three public authorities. The findings suggest that vagueness serves as a means to exercise managerial control through the promotion of interpretative work and continuous, identity-related dialogues on value related issues. The article argues that even though such uses of the ‘platform of values’ genre may be functional in neo-bureaucratic organizations, it is also problematic when semiotic vagueness is used as a tool for concrete actions such as internal promotions.