New Zealand's beleaguered National Oracle Solution (NOS) project is likely to end up costing more than $NZ100 million but is not well set up to successfully deliver the promised benefits, a review of the project has found.

Nonetheless, in a review of the project released by Health Minister David Clark yesterday, consulting firm Deloitte has recommended that wave 1 of the project go ahead, with a roll out to the first four district health boards at Waikato, Canterbury, Bay of Plenty and West Coast.