Design of heterorhythmic construction work flows based on the modification of the critical path method
Abstract
Design of heterorhythmic construction work flows based on the modification of the critical path method
Incoming article date: 13.11.2025This 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