A computer-implemented method for managing user story requirements includes collecting, by a processor, a plurality of requirements, creating, by the processor, a plurality of content space specification files that includes the plurality of requirements, processing, by the processor, the plurality of content space specification files to generate a plurality of content space-based testable units, and managing, by the processor, the plurality of requirements to reduce gaps and overlap between individual content space testable units in the plurality of content space-based testable units.