Cost and schedule deviation from the estimated baseline are common in construction projects and have a negative effect on construction activity, which is a substantial portion of the GDP in most countries. Previous research studies examined the causes of deviation in several countries including some Gulf Council Countries (GCC) like Kuwait and the UAE, but none were done on the considerable Qatari market, that is set to boom further with the upcoming preparations for hosting Qatar FIFA 2020 World Cup. Therefore, this study identified and ranked, using the relative importance index (RII) method, the significant factors influencing cost and schedule deviation in Qatari residential compound projects. A detailed questionnaire was developed on a Likert scale addressing these factors and was used to solicit the viewpoints of Grade A contractors. The collected project sample had a total capital investment of approximately $1.25 billion and the projects were executed within a five year period (2000)(2001)(2002)(2003)(2004)(2005). The study indicated that over 85% of the projects experienced cost and/or schedule deviation. Most importantly, the study revealed that most contractors viewed material delays as the most prominent issue influencing construction projects predictability in Qatar. Other top ten factors included design changes, labour shortages, deficient estimates and cash flow planning.

Embarking on the World Cup journey with circular collaborative strategies can positively impact the environment and socioeconomic outcomes to prosper development at the center of sustainability. World Cup mega-events are set with overriding priorities in cutting down environmental footprints to accelerate sustainable development across the Fédération Internationale de Football Association movement to leave an enduring legacy post-event in global sports. This paper conducts the first of its kind comprehensive critical analysis on ecological quality in life cycle impact assessment for 2022 Fédération Internationale de Football Association World Cup modular container stadiums in Qatar. A “cradle-to-cradle” life cycle assessment, including the material and resource production, construction, operation, and end-of-life (EOL) phase, is analyzed in this study, taking the case of Ras Abu Aboud stadium. Ecoinvent v3.7.1 life cycle inventory database was used to quantify the ecosystem damage-related impacts. Two scenarios were considered for the operation phase: scenario 1 (single year of operation) and scenario 2 (30 years of operation). A sensitivity analysis was used to understand the extent of impact per category indicator subject to material quantity variations. The results showed that the planned circularity contributed to savings in the EOL phase of more than 4.26 × 107 species.year compared with 1.7 species.year across the overall life-cycle impacts. Several perspective-based circular and sharing economy scenarios were assessed to reveal the benefits of circular collaborative economy applications in leveraging possible ecological burdens before, during, and post-mega events in sustainable construction. This research acts as a backbone for future single-sport mega-events to attempt to transition to a carbon-neutral, fully sustainable event with an everlasting legacy.