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How to tell a project is too big for your vendor
The warning signs that a project has outgrown your vendor, how to check before you sign, and what to do if you are already mid-project.
No vendor has ever told me a job was too big for them. Not once in twenty years. It is not dishonesty, mostly. It is optimism, plus the fact that saying yes is how they get paid.
So the job of figuring out whether a project fits the vendor falls to you, the buyer. The good news is that the signs are usually visible before the contract is signed, if you know where to look.
The quote tells you more than the pitch
A vendor working at the edge of their capacity writes a different kind of quote than one working comfortably inside it. Comfortable vendors itemize. They break the work into phases, name the equipment, flag the things they need from you, and put dates on the milestones.
Vendors in over their heads write short quotes. One number, a vague scope line ("supply and install network infrastructure as discussed"), and a payment schedule that is heavily front-loaded. The front-loading is the tell. A vendor confident in their delivery is happy to be paid as they hit milestones. A vendor who needs your deposit to fund the job, or who suspects the back half will go sideways, wants the money early.
I wrote about this pattern in the camera context in how to read a camera-system quote, and it holds everywhere: cabling, networks, hosting migrations, software builds. Vague scope plus front-loaded payment is the signature of a stretch.
Ask who is actually doing the work
This is the single most useful question, and almost nobody asks it.
Small vendors scale by subcontracting, which is fine when they say so and manage it well. The problem is the vendor who wins the job on the strength of their senior person, then staffs it with whoever is available. On an install, ask whether the crew showing up are employees or subs, and who supervises them. On a software build, ask who writes the code and who reviews it. If the answer is fuzzy, the plan is fuzzy.
A related question: how many projects of this size have they run at the same time as their other work? A three-person shop can absolutely deliver a big project. What it cannot do is deliver a big project while also handling its normal service load, unless someone has planned for that. Ask what happens to your project when their biggest support client has an emergency.
The reference that actually matters
Every vendor can produce two happy references. Ask instead for a reference from a project of the same size and shape as yours, finished in the last two years. Then ask that reference one question: what went wrong, and how did the vendor handle it?
A project of any real size has problems. You are not looking for a vendor with a spotless record; that record usually means small projects. You are looking for one whose problems got surfaced early and fixed, rather than hidden until the deadline.
If you are already mid-project
Sometimes you find out too late. The milestones start slipping, the senior person stops coming to meetings, and every question gets answered with "we're on it."
The instinct is to push harder on the vendor. In my experience the better first move is to shrink the project. Sit down and identify the smallest version of the work that gets you something usable, and reframe the remaining scope around that. A struggling vendor can often land a smaller plane. Then decide separately, and calmly, whether they get the rest of the work.
What rarely works is paying more money into a stalled project in the hope it speeds up. It doesn't. It just raises the cost of the eventual decision.
A cheap way to check before you sign
Most of this comes down to one habit: get the quote and the plan looked at by someone who has no stake in the answer. I do this as a second-opinion review, and the pattern I see is consistent: the problems that surface in an hour of review are the same ones that would otherwise surface in month three, at ten times the cost.
Whether that review comes from me or from someone else you trust, do it before the deposit goes out. If you have a quote in hand and something about it feels thin, get in touch and I'll tell you what I'd ask the vendor before signing.