The Day Your Spreadsheet Stopped Telling the Truth
Every organization starts with spreadsheets. The risk begins when maintaining the spreadsheet becomes harder than maintaining the truth, and nothing in the file tells you the day that happened.
There’s a tab in a lot of CMMC spreadsheets called something like “Evidence, FINAL, v3, use this one.” It’s usually the tab nobody quite trusts. Somebody made it the source of truth months ago, the environment kept moving, and the tab didn’t.
On a quiet Tuesday, that’s a mild annoyance. On the day an assessor sits down, or a big customer asks you to prove something, it’s a real problem.
Almost every growing contractor hits a version of this. The spreadsheet that ran the whole compliance program beautifully at the start slowly stops being something you can rely on. The hardest part is that it never announces the change.
How it quietly stops being true
Picture the asset list you built in January. It was accurate that week. Since then, two people were hired and handed laptops, your dev team adopted a new cloud tool without ceremony, a contractor used your VPN for three weeks and moved on, and someone spun up a cloud account on a personal card to hit a deadline. None of that made it into the sheet, because a spreadsheet only knows what the last person to open it told it. It doesn’t notice change. It just sits there, confident and out of date.
When I was running our CMMC program as the compliance lead, this was the part that surprised me most. Building the tracking wasn’t the hard part. Keeping it honest as the business kept moving was. Every new hire, every new tool, every policy tweak wanted to flow back into the same handful of documents, and it took real discipline to make sure they actually did.
The mistake isn’t the spreadsheet
Here’s the mistake, and it’s an easy one to make. We assume that because the spreadsheet looks organized, it’s accurate. Neat columns feel like control. But a tidy sheet and a true sheet are not the same thing, and the gap between them grows every week nobody reconciles it.
A spreadsheet never tells you the day it stopped being true.
That’s the whole thing in one sentence, and it’s worth sitting with, because the failure is silent. You don’t get an error message. You find out at the worst possible time, and it tends to show up in the same few places:
Your asset inventory drifts.
The environment changed; the list didn’t. An undocumented system can call your scope, SSP, and supporting evidence into question, especially if that system touches CUI.
Your evidence links rot.
Files get renamed, folders get reorganized, and half the links quietly break. The control might be implemented correctly, but if the evidence cannot be produced when it is requested, you have created an avoidable assessment problem.
Your plan becomes a wish list.
A row that says “fix MFA, Bob, Q3” looks like a plan. A real plan has owners, dates, sequencing, and a rough cost. Neat rows aren’t the same as a plan someone can stand behind.
Nobody trusts the current version.
Three people have edited the main document, two saved local copies, and no one is certain which one is real. Once the anchor document is in doubt, everything attached to it becomes suspect.
This isn’t failure. It’s growth.
Here’s what I want you to hear before anything else. Every organization starts with spreadsheets. There is nothing wrong with that. The mistake was never starting there. It’s staying there after the business has outgrown them. If your sheet is straining, it isn’t a sign you did compliance wrong. It’s a sign you grew, and the way you keep track simply has to grow with you. A spreadsheet isn’t a bad compliance tool. It becomes a risky one when maintaining the spreadsheet becomes harder than maintaining the truth.
That reframes the whole question. It’s not “is our spreadsheet messy?” Every spreadsheet is a little messy. The real question is one every growing company eventually has to answer: has our compliance program evolved beyond the way we’re managing it? Put more plainly for the person who signs things: have our spreadsheets reached the point where they create more risk than value? When the tracking starts hiding the truth instead of showing it, you already know the answer.
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What I would do if I were in your seat
Give the asset inventory one owner and a standing half hour.
One named person, thirty minutes on the last Friday of the month, to reconcile the list against reality. That single habit prevents a lot of avoidable scope and documentation problems.
Check your evidence links on a cadence.
Once a quarter, open them one by one and fix what’s broken. Ninety minutes now is far cheaper than a gap on assessment day over a control you actually had.
Turn your to-do list into a handful of real projects.
Group your open gaps into ten or fifteen projects, each with a lead, a realistic date, and a rough dollar figure. That’s what oversight looks like, and it’s what holds up under scrutiny.
Give your main compliance document one home and one owner.
Everyone else gets read access. Changes go through one person. It’s a decision to stop treating your most important document like a shared scratch pad.
Those four decisions will carry you a long way, and for a good while, discipline is enough. As the program grows, you may reach a point where maintaining the spreadsheets takes more time than doing the work they were built to track. That is when it makes sense to evaluate whether a GRC platform can reduce manual reconciliation, improve version control, and give the team one place to manage the program. The tool is not the maturity. Recognizing when your process no longer scales is.
You don’t need a big budget or a six-month project to take that step. You need to recognize the moment your program outgrew memory and good intentions, and to give it the structure that growth earned. That’s not a setback. It’s what leveling up looks like.
So here’s the question worth sitting with, only half in jest: if our compliance coordinator took next week off, would anyone else know which spreadsheet to trust? If the honest answer is no, that isn’t a crisis. It’s the signal that your program has outgrown the tool, and it’s time to give it something sturdier.
CMMC: Everything You Need to Know to Get Started (6th Edition)
Want the full compliance framework and the funding resources available to defense contractors? Our guide has it.
A few sources
- NIST SP 800-171: the security requirements themselves, and the system security plan they expect you to keep current
- NIST SP 800-171A, the CMMC Assessment Process, and the CMMC scoping guidance: how assessment objectives are evaluated through examine, interview, and test, and how assets are categorized and scoped
- 32 CFR Part 170: the CMMC Program and the assessment your documentation has to hold up under
