2.17 Scope changes can provide cost reductions in PFI contracts but these also entail the public sector agreeing to a reduction in the type or standard of service provided. There is little incentive for an SPV to agree to these changes unless it improves its profit margin or return on investment. Nevertheless these types of changes can reduce cash costs. Queens Hospital Romford reduced its unitary charge by around two per cent through renegotiating service terms. This included reducing the number of hot meals provided each day from two to one. The Ministry of Defence also reported savings, which were achieved by reducing facilities management standards in some of its living and working accommodation.