The gradual evolution away from the organization's purpose into ancillary activities that may eventually result in an organization that is very unfocused is called:

The answer is Mission Creep. The mission creep is the development of a project or undertaking further than its original objectives often after initial achievements. The mission creep is usually reflected objectionable due to the unsafe path of each attainment breeding more ambitious tries, discontinuing only when a final often catastrophic failure happens.