Coordination is integral to operational efficiency of construction projects. Coordination process relies on managing dependent activities and the structural centrality in social networks is strategic to project actor's management activity. This study aims to explore the effects of network centrality on coordination performance. Network centrality concepts and coordination theory are examined via e-mail communication data of İstanbul Sabiha Gökçen International Airport's (ISGIA) New Terminal Building Wayfinding and Signage Design Project (WSDP) actors. E-mail data mining for identifying different coordination dependencies is derived from the constructs of Malone's (1988) coordination theory and used to measure the actors' coordination scores. Social network matrix of information exchange network is constructed to calculate degree, betweenness and closeness centrality measures. ISGIA data analysis suggests a significant relationship between out-degree, outcloseness centrality and coordination. Findings highlight that out-network centralities support the ability of an actor to coordinate the dependent actions of other project actors; and the design and construction practices rely on the central position in a network in mapping effective coordination processes. INTRODUCTIONBuilding design and construction represent a collective effort from project participants. A construction project involves diverse participants essentially collaborating closely. They are usually geographically separated when making interdependent decisions. This requires coordination to maintain compatibility. Coordination refers to specific protocols and procedures in conjunction with smooth flow of communication in all directions to achieve project objectives (Chitkara, 1998). Technical interdependency and organizational independency of construction projects demand improvement of coordination process to facilitate the efficient information flow and thus product quality (Saram and Ahmed, 2001;Mokhtar et al., 1998). Research that was made on critical success factors identified the efficiency of information exchange as a key factor in delivering high-performance projects (Chan, et. al., 2004). Project performance depends mainly on the effectiveness of coordination process results in communication networks rather than traditional benchmarks for the common factors of time, cost, and quality (Chinowsky, et al.,