Ask ten AEC or EPC teams how they manage design review comments and you will hear three answers: a comment resolution sheet in Excel, comments traded over email (often as marked-up PDFs), or a dedicated review platform. Each can work. Each fails differently. This article compares them honestly — including where the simple options are genuinely the right choice.
The spreadsheet CRS is the industry default for a reason: everyone has Excel, everyone understands rows and columns, and it costs nothing. If you want a solid starting structure, use our free CRS template.
Where it works: small projects, one or two reviewers, short revision cycles, a single disciplined owner consolidating input.
Where it fails: parallel reviewers create conflicting copies; statuses get edited with no record of who changed what; open comments get lost between revisions; and reminder-chasing is a manual job. The failure modes are predictable enough that we wrote 7 Mistakes You're Making with Manual CRS Workflows about them.
Emailing marked-up PDFs (from Bluebeam, Acrobat, or plain scans) feels efficient because commenting is fast and visual. Markup tools like Bluebeam Revu are excellent at creating comments — the problem is everything after that: the comment's lifecycle lives nowhere. Which markups were accepted? Which are still open in Rev C? Whose inbox holds the decision?
Where it works: informal internal reviews where nothing needs to be proven later.
Where it fails: anywhere an audit trail matters. Email fragments the record across inboxes, attachments, and forwarded threads. When a claim arrives two years later, "search everyone's mailbox" is your document control strategy. We cover this failure mode in depth in Is Email Killing Your Audit Trail? and in The Future of EPC Document Control.
A dedicated platform like Contrat.io treats each comment as a tracked item with a permanent ID, an owner, a status governed by role-based permissions, and a complete change history. Reviews happen against the document in one shared workspace; revisions carry open comments forward; deadlines trigger reminders automatically.
Where it works: multi-reviewer, multi-revision, multi-discipline projects — and any contract environment where you may one day need to prove who said what, when.
Where it may be overkill: a two-person team reviewing a handful of documents a year.
| Excel CRS | Email + PDF markups | Dedicated CRS software | |
|---|---|---|---|
| Cost | Free | Free (tools you own) | Subscription (Contrat.io from €21.90/mo) |
| Single source of truth | Only with strict discipline | No | Yes |
| Parallel reviewers | Manual consolidation | Conflicting markups | Built-in |
| Comment status tracking | Manual, unverified | None | Enforced, role-based |
| Carry-over between revisions | Copy-paste | Manual re-checking | Automatic |
| Audit trail | "Last modified" only | Scattered across inboxes | Complete change history |
| Deadline reminders | Manual chasing | Manual chasing | Automatic |
| Setup effort | Minutes | None | An afternoon |
Use two questions:
1. How expensive is a lost comment? On a small fit-out, a missed comment costs an awkward site visit. On an EPC infrastructure package, it costs rework, delay, and potentially a claim — the economics we walk through in How to Reduce Costly Rework and Claims in EPC Projects.
2. Will anyone ever ask you to prove the review happened? If yes — regulator, client, or opposing counsel — email is disqualified immediately, and Excel only survives if your discipline never slips. A system that records history automatically is the only approach that doesn't depend on humans being perfect.
If you land on option 3, Contrat.io offers a 30-day free trial with no credit card required. Bring one live review cycle into it and compare the experience against your spreadsheet — that single cycle is usually the whole evaluation.