Somewhere in the last five years, visiting a vendor’s floor stopped being standard practice. Video walkthroughs replaced it, then never gave the slot back. Outsourcing due diligence now runs almost entirely on decks, reference calls and a scheduled tour delivered through someone’s phone camera — and the industry has quietly agreed this is fine.

It is not fine. The argument here is narrow and worth stating plainly: remote evaluation is good at verifying what a vendor documents and bad at revealing what a vendor does not. Those are different problems, and only one of them is why partnerships fail.

The evidence on remote inspection is not encouraging

A Harvard Business School working paper by Palmarozzo, Toffel and Ouellet — first circulated in 2023 and revised in September 2025 — analyzed more than 46,000 supplier audits conducted in person or remotely across thousands of sites between 2019 and 2021, when remote auditing surged under pandemic travel restrictions. Remote audits reported fewer violations than in-person ones. The gap was widest for exactly the standards clauses where auditors normally establish compliance by direct observation rather than document review.

Read that carefully, because it is not the obvious finding. It is not that remote auditors were lazier. It is that the categories of problem that only show up when a human is standing in the room stayed invisible when nobody was.

Contact center operations are not factories, but the mechanism transfers cleanly. Floor density, supervisor presence, whether QA coaches sit near the agents or in a separate building, how the room sounds at 3 p.m. on a Thursday — none of that appears in a proposal, and none of it survives a camera pointed where the vendor points it.

What a visit surfaces that a call does not

Evidence type	Remote evaluation	On-site visit
Documented process	Fully verifiable	Fully verifiable
Systems and tooling	Demonstrable via screen share	Same, plus how agents actually use it
Floor conditions and density	Whatever is in frame	Observable, including what was not staged
Supervisor-to-agent proximity	Rarely visible	Immediately obvious
Informal conversation	Effectively none	The most useful hour of the trip

That last row is the one buyers underestimate. Scheduled interviews produce scheduled answers. The unscripted exchange in a hallway, over lunch, in the ten minutes before the taxi arrives — that is where a team lead mentions the account that churned last quarter, or that the training team lost two people in March.

The governance gap outsourcing due diligence has to cover

Buyers assume the relationship will be managed tightly enough after signing that a weak evaluation upfront gets corrected later. The data argues otherwise.

Deloitte’s 2024 Global Outsourcing Survey, drawing on more than 500 executives, found that 70% describe their vendor management function as not fully mature. The same survey found 70% had selectively insourced work previously held by a third party over the preceding five years. Most companies are not equipped to catch after signing what they failed to see before it. The pullbacks are what that looks like in practice.

Rigorous outsourcing due diligence is therefore not an optional step for careful buyers. It is compensating for a governance capability most organizations admit they do not have.

The objection, and why it is weaker than it sounds

The counterargument is cost. Flights, hotels, two days of senior time — for a decision that a video call can approximate.

The arithmetic only works if you price the visit against the contract instead of against the failure. A support partnership that has to be unwound at month nine costs the transition, the re-selection, the second ramp, and the customer damage in between. Against that, the trip is a rounding error.

Geography changes the math too, which is one practical argument in favor of a call center nearshore option for US buyers: a site in Tijuana, Guadalajara or Monterrey is a short flight from most of the West Coast, so the visit is a day trip rather than a week-long expedition. Proximity does not make a partner better. It makes verifying one cheap enough that nobody talks themselves out of it — and it makes the second visit, the one after go-live, realistic instead of theoretical.

What to actually do on the floor

Go unannounced if the contract allows a follow-up visit, and schedule the first one loosely. Ask to sit next to an agent for thirty minutes with no supervisor present. Listen to three live calls that nobody selected for you.

Walk to the training room. If it is being used as storage, you have learned something. Look at where supervisors physically sit. Ask an agent how long they have been on the account, then ask the person beside them.

None of this requires expertise. It requires being there. And it pairs with the numerical work — the metrics that actually predict service quality tell you what the operation produces, while the visit tells you whether the operation can keep producing it. Neither substitutes for the other, and comparing partners on rate alone substitutes for both.

FAQ: Site Visits Still Matter in Outsourcing Due Diligence