This article examines the fundamental principles of the combined critical path method/line of balance (CPM-LOB) method, used in foreign practices for scheduling repetitive construction projects, and the corresponding algorithm for calculating the parameters of heterorhythmic construction flows based on the duration of critical path activities within a single local work front (work unit) and the project-wide deadline. The article identifies the method's key shortcomings and their potential solutions. A modification of the CPM-LOB method, utilizing parallel work by crews on multiple work units within cycles, is presented. A method for coordinating related work performed by crews within cycles, the "Delta-shift" method, is described. Finally, the article assesses the applicability of this method to designing heterorhythmic work flows in domestic scheduling practices for construction, reconstruction, and major repair projects involving buildings and structures.

Keywords: construction organization, flow method, scheduling, flowline chart, network diagram, critical path method, construction work flow, work front, work unit, Delta-shift method

The article considers the problems of using construction materials of improper quality in Russia. The concepts of sub-standard, fraudulent and counterfeit construction materials (SFC materials) are defined. The distinctive features of SFC products in the construction materials market and the consequences of non-compliance with general requirements for their quality are highlighted. Features of digital marking of construction materials in Russia are analyzed. Key problems of incoming inspection made by the contractor and their causes are highlighted. In conclusion, recommendations are given to improve the efficiency of the incoming inspection system for construction materials.

Keywords: construction materials, quality, fraudulent products, counterfeit products, labeling, safety of buildings and structures, construction control, incoming inspection