Jouni Lyly-Yrjänäinen has a PhD in Industrial Management and been conducting interventionist research projects in the field of cost management for over ten years. Deep involvement in the development processes of the case companies has led to numerous research papers as well as several patents. Petri Suomala holds M.Sc. (Eng) and Dr.Tech. in Industrial Engineering and Management. Currently the head of Department of Industrial Management and the director of Cost Management Center (CMC), she has been involved in various interventionist research projects in the field of cost management for about fifteen years.