It depends on whether the work is one-time or recurring. Consultants suit a one-off assessment or specialized expertise, while a platform suits the measurement, reporting and audit prep that repeat every cycle.
Most manufacturers with ongoing regulatory obligations need the recurring capability, and many use both.
The hidden cost of the consultant-only route is that you pay again each cycle for the same manual data collection and cleanup, and the knowledge leaves when the engagement ends. A platform turns that into infrastructure your team owns, with the data live and accessible rather than archived in a report you get once a year.
In practice the two coexist: consultants often work directly inside the platform on behalf of their clients, so you keep the expertise and stop repurchasing the data work.