156 Production The designer's role After formal presentation, and once the client has approved the final design drawings, it is the designer's job to produce a set of `working drawings' or `production drawings'. The number of these will vary from project to project, but their function remains the same. They will provide the building contractor, and anyone else involved in the construction process, with a comprehensive description in drawings and words of the full extent and quality of the work necessary to complete the project satisfactorily. They will also act as a formal record of the details of the contractual agreement between client and builders. The designer must not only provide plans and sections of the complete project but of every element within that project, in order to describe in detail the materials to be used, the sizes of components and the method for their assembly. Right and below These drawings show how essential information about one,