Libraries that shift their focus from acquisition to access needs to realize its implication for other parts of their operation this often requires a significant investment in equipment and training. It requires the development of an infrastructure to support document delivery. The process of selection can became even more time-consuming for a library that is pointing users to remote materials than for a library that is buying its own material (this is particularly true on the world wide web where pointers have to be constantly maintained, and where there are fewer clues as to the reliability of information resources)