The article describes the model for improving the technological preparation of small-scale and single production. At the heart of the model is division of the part into separate elementary surfaces with subsequent analysis of the acceptable technological methods and means used in their processing. The presented model of technological preparation of production allows to choose the optimal variant of the technological process of manufacturing a batch of parts taking into account the available production schedule. The choice of the optimum variant of the technological process is made on the basis of comparative analysis of a combination of different methods and means of production used in the process of manufacturing the part. An example of the choice of the optimal variant of the technological process of manufacturing a "Flange" part is considered. A scheme is presented for splitting the part into elementary surfaces and combining them into blocks of surfaces. The optimal variant was chosen based on the comparative analysis.