The segmentation of the stationery market, analyzes the demand, the main trends, the prospects for development and the existing problems are considered in the work. It has been established that the main two segments over the past years are office supplies and educationproducts. Modeling of business processes of the office supply store network was carried out, IDEF0, DFD, IDEF3 diagrams were constructed using the IDEF methodology for the AS-IS variant. The conclusion is that re-engineering requires wholesale business processes related to theevaluation of suppliers, which is currently determined by subjective judgments about their activities of the store director. The main criteria for evaluation of office supply store suppliers are analyzedand their classification is given. The main criteria for selecting suppliers, such as security of supply, price of goods, average lead time and financial position, are determined. It is revealed thatthe most promising method of supplier evaluation is the method of expert evaluation. The methodology of complex supplier evaluation, based on the matrix implementation of the method ofexpert assessments, as well as the algorithm for calculating the reliability of one supplier's supply, is presented. Measures to reengineer the modeling of business processes of the office supply stores'shopping network based on the mathematical model are proposed. IDEF3 diagrams were constructed using the IDEF methodology for the TO-BE variant, and a comparative analysis of the original and post-reengineering diagrams was performed. The conclusion is made about the prospects of re-engineering other wholesale business processes as such, which provides the main revenue for the stationery store.