The HTO-concept used as a tool when designing a new VTS center in Sweden

Vessel Traffic Service (VTS) operations are defined by highly qualified personnel supported by advanced technology; an environment that exposes operators to a high cognitive workload. In 2009, Swedish VTS had to increase efficiency with maintained safety and quality. Through the HTO concept, all dimensions that affect the operators' performance were considered – human, technological and organizational aspects had to be balanced. The article discusses the experiences from using the HTO concept in the VTS domain, presents the results of this specific project and suggests some important principles needed to be in place to guarantee successful outcomes of reorganizing projects.