“…We inter‐viewed managers in the positions of a product manager, business controller, R&D director, and project manager in order to acquire multi‐perspective data from portfolio, program, and project management roles (following Blomquist & Müller, ). With this empirical setting, we try to avoid the single informant bias mentioned, for example, by Teller (, p. 48) who promoted examining portfolio‐level risks by analyzing project and portfolio managers; we also include stakeholders from outside the project management office (Jerbrant & Gustavsson, ); in other words, from business and financial management (Rabino, ). We contribute to the PPM literature by highlighting the variety of managers relevant to identifying and managing uncertainty stemming from the environment, organi‐zational complexity, and single projects, with the help of management control systems.…”