“…The results of qualitative interviews helped to develop three categories for common sources of disputes as “project uncertainty, contract and process, people and behaviour issues.” The questionnaire survey by Awwad et al (2016) concluded that common dispute causes, as perceived by different stakeholders in the Middle East construction industry, were contractual causes including “opportunistic behaviour of contract parties, incomplete and contradictory contract documents, the ill-defined scope of work, and unfair risk apportionment.” A similar questionnaire survey conducted by Mahamid (2016) in Saudi Arabia also concluded that the top five factors causing disputes were “delay in progress payment by the owner, unrealistic contract duration, change orders, poor quality of completed works, and labour inefficiencies.” Another questionnaire survey among key stakeholders in large construction projects in Saudi Arabia was employed to rank the dispute factors and assess their relative significance (Assaf et al , 2019). According to the survey results, the most significant contributors to construction disputes were found to be “change or variation orders due to new requirements from the client, variations in quantities due to new requirements from the client, delay caused by contractor, design errors or omissions, and inconsistencies in the drawings and specifications.” Yildizel et al (2016) also applied the questionnaire method for the discussion of the current major constructional dispute reasons in Turkey. Questionnaire results demonstrated that the major factors causing disputes were “poor quality of performed works, delays in progress payments, inefficient site management, poorly written contracts, and design mistakes.” By investigating 48 legal cases in the United Kingdom, Barman and Charoenngam (2017) believed that core reasons for construction disputes can be grouped into five categories, which were “delay, defects, payment, termination, negligence, and performance.” A recent questionnaire survey conducted among professionals representing various stakeholders in Sri Lanka by Illankoon et al (2019) identified “failure to administer the contract, error omissions in contract documents, incomplete design information or employer requirement, failure to understand and/or comply with its contractual obligations, and poorly managed construction process” as the main factors leading to construction disputes.…”