“…By shadow systems, we refer to autonomous software systems or extensions to existing systems that a central IT department neither develops nor controls (Behrens, 2009;Fürstenau & Rothe, 2014;Zimmermann, Rentrop, & Felden, 2014). Shadow systems and related terms 1 have increasingly grown in practical and academic attention due to the emergence of cloud computing (Mell & Grance, 2011;Müller, Holm, & Søndergaard, 2015), softwareas-a-service (Winkler & Brown, 2013), bring-your-own-device (BOYD) programs (Miller, Voas, & Hurlburt, 2012), IT-related workarounds (Alter, 2014), low-entry programming in spreadsheets (Leon, Abraham, & Kalbers, 2010), and other important trends in the technological landscape toward decentralized and userdriven computing innovations (Györy, Cleven, Uebernickel, & Brenner, 2012).…”