“…Many publications in the last twelve years have assessed the determinants of scale-up success and laid out frameworks and practical guidance to support the scale-up process (Simmons et al, 2007;Hartmann & Linn, 2008;ExpandNet & World Health Organization, 2009, 2010, 2011Yamey, 2011;Chandy & Linn, 2011;Chandy et al, 2013;Cooley & Linn, 2014;Milat et al, 2015;Barker et al, 2016;Milat et al, 2016;Management Systems International, 2016;Spicer et al, 2018;Bulthuis et al, 2020). Other publications have focused on sharing in-country project experience of scale-up activities (Ghiron et al, 2014;Igras et al, 2014;Spicer et al, 2014;Keyonzo et al, 2015;Aichatou et al, 2016;Fajans & Simmons, 2016;Omimo et al, 2018;Mai et al, 2019;Benevides et al, 2019;Oku, 2019;Expand-Net, 2021). These have all contributed to shifting the global health and development paradigm away from more conventional project approaches (Keyonzo et al, 2015) to ones that use knowledge about what works for scale-up to shape the introduction of new interventions and their subsequent expansion and institutionalization.…”