We often talk about ‘evidence-based decision making’ or becoming ‘data-driven organisations’. But how much faith should we put in data? ODI CEO Jeni Tennison will look at how complex using data in decision making can be, and how, to get the best result, sometimes we should limit our use of data. About Jeni Tennison Jeni Tennison is the CEO of the Open Data Institute. She gained her PhD from the University of Nottingham then worked as an independent consultant, specialising in open data publishing and consumption, before joining the ODI in 2012. Jeni was awarded an OBE for services to technology and open data in the 2014 New Year Honours.