The time is here. The period of preparation is over and the implementation can begin. The period of execution will usually be shorter than the period of preparation. Due to good preparation, the often expensive desired changes in the work will probably not or hardly ever be an issue anymore and construction errors can also be avoided. During construction, the architect will chair the construction meetings and prepare the reports and/or make working visits and ensure that construction is carried out according to drawings and specifications. In addition, he has ad hoc consultations with the contractor and advises on unforeseen matters. The architect supplies any revision drawings, manages the additional and less work and draws up the delivery report together with the contractor.