The Free On-line Dictionary of Computing (30 December 2018):

Semidetached Mode

    A term used by COCOMO to describe a project
   development somewhere between organic and embedded.  The team
   members have a mixture of experienced and inexperienced
   personnel.  The software to be developed has some
   characteristics of both organic and embedded modes.
   Semidetached software can be as large as 300K DSIs.

   (1996-05-29)