This study develops a procedure to prioritize delay factors of industrial projects. The concept of delay factors, and other related concerns have been examined in previous studies on construction projects. However, the delay factors of industrial projects are less examined. Furthermore, this problem is poorly linked with novel Multiple-Criteria Decision Making (MCDM) models such as Best-Worst Method (BWM). In this regard, to fill the gap of previous literature, two linked phases have been addressed to obtain different objectives of this research. The initial phase of this study investigates different delay factors of industrial projects. To do so, a literature review is conducted to develop numerous factors which cause delays in industrial projects. Next, the second phase of this research applies a BWM to investigate and prioritize these factors. According to the obtained results, contractors, consultants, climate, customers, shortages of raw materials, financial issues and poor manpower are the most important delay factors of industrial projects, respectively. Finally, a conclusion and some future research directions are provided in the final section of this research.