5.11 A market test exercise is an ideal time to review the specifications for soft services. The public sector client can, of course, seek to change requirements in a PPP at any time, but by linking the changes to a market test it gives it the chance to change requirements in a competitive environment. However, it must be alive to the cost and value for money implication of any decision to change the specification. It should be aware that in a market test costs are just as likely to increase as reap savings, particularly when a fresh specification is introduced. A change in specification may also result in the PPP contractor and its funders reviewing the remaining risks in the PPP contract and this could lead to an increased unitary charge