Halliday & Matthiessen (2014: 232):
In a ‘transformative’ clause, the outcome is the change of some aspect of the Actor (‘intransitive’) or the Goal (‘transitive’). … In the limiting case, the outcome of the final phase is to maintain the conditions of the initial phase …
Unlike ‘creative’ clauses, ‘transformative’ ones can often have a separate element representing the outcome … an Attribute specifying the resultant state of the Goal. Even where the sense of outcome is inherent in the process, the outcome may be indicated by the ‘particle’ of a phrasal verb, as in shut down …