Table 1.

Process-based Costing Pragmatic Decisions

Decision	Reasoning
Expert team and interventionist salaries will be based on national salary averages.	National averages of occupational salaries represent the national costs rather than institutional salaries at each site. National averages were determined from the 2017 U.S. Bureau of Labor Statistics National Occupational Employment and Wage Estimates (U.S. Bureau of Labor Statistics, 2018). The hourly salaries were abstracted for the interventionist and expert team.
Consistent occupations will be used for the interventionist and expert team costs.	Suggestions for the interventionist and expert team were based on qualitative exit interviews conducted with the expert panel (Williams, Shaw, Perkhounkova, Hein, & Coleman, Under Review). The interventionist will be a registered nurse. The expert team will include the nurse interventionist, a social worker, an occupational therapist, and a nurse practitioner.
Initial enrollment time will not include research related procedures.	The time used to complete the study consent and study surveys will be excluded from the time records for both the FamTechCare and attention control groups. The FamTechCare initial enrollment time will include VMU training and support description/socialization. The attention control enrollment time will include support description/socialization.
VMU will be mailed to and from each dyad.	To increase access to the intervention, the VMU will be delivered to and returned from the dyad via mail. Mail costs from dyads who used this procedure are averaged and imputed to all dyads.
VMU training will occur via the telephone.	To increase access to the intervention, telephone training reduces the need for the interventionist to be near the dyad (i.e., reduces mileage costs and interventionist travel time). The dyad training time will not be imputed for dyads who received in-person training compared to phone training. The time for phone training did not differ significantly from the time for in-person training (p = .353).
Each VMU will be used by 20 dyads.	Each set of VMU equipment will be estimated to last 5 years between a total of 20 dyads. In the current trial, one set of VMU equipment was used by four dyads per year. Additionally, all equipment was returned in working order and lasted the entire 4-year trial. No iPads needed replaced throughout the trial and would not have needed replacing at the end of 4-years.