This standard has been developed for use in contractual relationships in which one party (the contractor) undertakes to execute building or civil engineering work (including installations, new buildings, maintenance, repairs and alterations), for the other party (the client), and in which most of the drawings, descriptions and calculations are to be provided by the client. The standard should not be used in cases in which many contractors are working on the construction site simultaneously. The standard is suitable for contractual relationships in which the circumstances are such that the client’s financial, progress-related and quality-related controls and supervision can be implemented without formal notification procedures. In contractual relationships in which, due to the organisation or scope of the project, there is a need for more extensive obligations related to notification and coordination, NS 8405 Norwegian building