milial home from care placements earlier than they would have been able to without this information. We assume there are other instances of similar longer term outcomes occurring, but practitioners found such examples difficult to identify, and processes to capture these on an ongoing basis were not in place. As such, we were unable to include estimations of value of this type as part of our cost-benefit analysis. Much of the value of the TFD may always remain hidden, in terms of avoiding child risk and vulnerability that is difficult to discern even on a qualitative level. This range of different benefits is therefore not included in our calculations. Finally, our calculations focus on cost of an hour of work as a proxy for financial value. However, in reality, the hours saved do not necessarily translate to fewer full-time equivalents (FTE) or direct bankable cost savings. Interpretation Focusing solely on time saved, a proxy of the monetary benefit generated by the TFD/TFE is £1.9 million in benefits since its inception, covering 130% of the £1.5m costs. As only a portion of the benefits have been accounted for, this might suggest that the TFD / TFE may be enabling even greater efficiency benefits. However, given the above caveats, such a conclusion should be viewed with caution. To best assess the cost efficiency benefits of such a tool, further evaluation would benefit from baseline data and the inclusion of monetised service users outcomes, which would require ongoing measurement. For more details on the methodology underlying the CBA, please refer to Appendix 9. Social Finance Limited +44 (0) 20 7770 6836 87 Vauxhall Walk, London SE11 5HJ socialfinance.org.uk 51 Cost summary Years 2015 2016 2017 2018 2019 2020 2021* 2022 2023 Total Total initial development £180,