Which statement about software development life cycle $($SDLC$)$ is incorrect:

An SDLC specifies the temporal relationships among the software processes, e$.$g$.,$ which process produces other processes' inputs.

An SDLC describes software processes for the development of a software product.

An SDLC includes the control mechanisms for applying the entry and exit criteria of the processes.

An SDLC consists of one software process.