One requirement placed on open hypermedia technology is the ability to support relationship management in large-scale information environments. We examine the issues of scalability encountered in supporting open hypermedia in a large-scale software development environment. The World Wide Web is discussed as an alternative approach to supporting relationship management in these environments and we identify reasons why open hypermedia is a superior approach. We also report on a research project where the Chimera open hypermedia system was used to support the relationship management needs of an industrial-scale development project of an aerospace organization. The results of this project supply insights to developers about the implications of supporting data scalability in open hypermedia systems. We conclude by evaluating the level of scalability achieved by our efforts and describe our future plans with respect to supporting additional orders of magnitude.