The doctoral thesis analyses the working methods and workload of workers in the technological sewing process. As part of the research, standard sets of motions of hand suboperations of technological sewing operations using the MTM (Method Time Measurement) system of predetermined times were developed and set up. Considering the size of the workpiece, the position of the bundles, the curvature and length of the seams, the arrangement of the workpiece layers and the method of laying the cutting layers, ten execution methods were developed for the taking suboperation. Five methods were developed for the suboperation of putting together, and three execution methods for the suboperation of positioning. In the technological suboperation of sewing four methods of workpiece guidance, three methods of seam bartacking, four methods of thread cutting, four methods of guiding using auxiliary devices and five methods of performing the suboperation in case of sewing interruption were developed. For the suboperation of laying off the workpiece three execution methods and nine methods of auxiliary motions were developed .Individual auxiliary hand suboperations contained in the technological sewing operation are presented as possible standard sets of motions depending on the size of the workpiece, the design of workplaces, the size and shape of work surfaces and the level of technical equipment of sewing machines. The time of the machine-hand suboperation of sewing straight and curved seams was determined by the application of the RAV and ZAK methods. The applicability of the defined standard sets of motions was investigated by recording and analysing the characteristic operations of sewing a men's jacket in real production systems. For the recorded technological operations, an analysis of the working method was performed, floor plan of the designed workplace was given, time norm, parameters of the working environment (temperature, relative humidity, lighting, noise, etc.) and workloads using the OWAS method and analysis of the workplace using the OADM method were determined. MTM analysis was performed using standard sets of motions for auxiliary hand suboperations defined in the doctoral thesis, and using RAV and ZAK methods for machine-hand sewing suboperations, the times of performing technological operations were calculated.. In order to speed up and facilitate the process of calculating normal times and time norms, based on the collected research results, a software solution was created in Microsoft Access®, for which a hierarchical cyclic structuring of models of set of motions and elementary motions for processing and storage within relational databases was previously performed. VIII Based on the conducted research, systematic analysis of the collected data and the obtained results, the applicability of the defined sets of motions of technological sewing operations using the MTM method in real clothing production systems has been proven.