In recent years, many companies around the world have adopted different forms of quality systems, such as ISO-based quality systems, or BS-based quality systems. A quality-based company provides higher quality services and products in comparison with non quality-based companies. As a result, quality-based companies have become reputable and attract more customers. In projects construction field, quality has become very essential for both contractors and owners. Contractors tend to provide high quality deliverables to satisfy their clients, and to remain successful in this turbulent business...