Answer
A repeatable process usually has clear stages: collecting the partner's implementation guide and specific requirements, starting from the closest existing map template rather than a blank one, exchanging test files and validating them against the partner's spec, and running a short parallel or certification period before cutting over to production. Buyers should ask how long each stage typically takes and who owns it, because onboarding delays usually happen in the gaps between stages, waiting on a partner's test file, waiting on internal sign-off, rather than in the mapping work itself.
It is worth asking the vendor directly how many net-new partners a typical customer onboards per quarter and how much of that work the software actually automates versus how much still requires custom development. A platform with strong steady-state operation can still be slow to onboard if every new partner effectively requires a bespoke mapping project. Buyers evaluating for growth should treat onboarding speed as its own criterion, separate from day-to-day transaction processing, since the two capabilities do not always come from the same underlying strength.