Gap analyses compare the magnitude and scope of a problem with existing resources to address that problem, revealing unmet need for resources. Data on the problem are gathered from a variety of sources such as surveys, interviews with stakeholders, existing documents, social indicators, and existing data systems. Information on existing resources is also compiled from similar sources. Putting these data together shows where services are needed but are not currently available. These results can then be used to create targeted plans for the expansion of existing services or creation of new services.