“…Process efficiency or pathway interventions used a variety of strategies to improve patient flow, such as elements of lean thinking approaches, changes to referral criteria, new patient pathways and changes to the model of care such as increased use of groups. There were 11 studies in this category (Table 2 ), including three in autism services (Austin et al, 2016 ; Lemay et al, 2018 ; Rutherford et al, 2018 ), two in occupational therapy services (Horton & Hall, 2008 ; F. Millar et al, 2013 ), four in mental health (Butz et al, 2019 ; Rocks et al, 2020 ; Wenning & King, 1995 ; Woodhouse, 2006 ) and one each in early intervention(Bell et al, 2010 ) and general rehabilitation (Camden et al, 2013 ). All but one (Rocks et al, 2020 ) reported reductions in waiting time (Figure 2b ), with eight of these cases being reductions of more than 50%.…”