"This team member sent me an email on a non-working day. It shows her commitment" said a business leader in conversation. This statement is not only assessing the team member. It says a lot about the beliefs and assumptions of this business leader too. Assumption and beliefs held closely by the team, shapes organisational and team cultures. In this edition of The OWL on Agile & Experiments, let us explore how assumptions shape organisational culture. We also discuss, how to spot and change assumptions, to shape your organisation’s culture.