Table 2.

Costs of programme implementation estimated retrospectively for the trial (delivery in one round, to 270 families) and modelled at scale (delivery in three rounds, over 1 year, to up to 1000 families)

	Costs during trial		Modelled costs at scale
	Cost (US$)	%	Cost (US$)	%	Key scaling assumptions
Set-up
Preparation	6511	5%	25 135	9%	Recruitment and community liaison occurs ahead of each round of implementation (includes preparation staff costs)
Training	7153	5%	7153	3%	Training costs are fixed; one 2-week training for a year of implementation (includes training staff costs)
Programme delivery
Staff costs	79 108	58%	112 645	43%	Staff costs for 42 weeks covers three rounds of 14 weeks, whereas staff were employed for up to 36 weeks for one round during the trial
Material costs*	33 483	25%	106 567	40%	Material costs scaled for three rounds of implementation; transport and food costs increase proportional to the number of families
Overheads
Overheads†	9700	7%	14 880	6%	Decreased level of management support, otherwise overheads normalised to a full year
T o tal	135 954		266 380
Cost per family	504		266

*Material costs include transport for facilitators and participants, food for participants, venue hire and required materials. Physical materials for this programme were minimal, but are assumed to have a replacement rate of 15% over the course of the year.

†Overheads include management support from the main NGO office, and local office running costs, including rent, limited supplies and communication costs (ie, internet, airtime).