Flowcerta vs. Manual Code Review
Manual code review is the right tool for some governance questions and the wrong tool for others. The honest answer is "run both, but stop spending reviewer time on the mechanical stuff." This page lays out where the line is.
Stick with manual review for…
- Business-logic correctness — does the workflow actually do what the requirement says?
- Architectural fit — does the new workflow belong in this project? Is it the right pattern?
- Cross-workflow design — does this duplicate logic that already exists in a shared library?
- Intent — is the developer trying to do the right thing, just badly?
Stop wasting reviewer time on…
- Reading every Assign for a hardcoded password.
- Checking that every HTTP call has a Try/Catch.
- Counting Retry Scope properties or sniffing for InvokeWorkflowFile in a loop.
- Eyeballing 47 selectors for fragile attributes.
- Building an audit-evidence pack at quarter-end by hand.
Where the work actually goes
| Concern | Manual review | Flowcerta |
|---|---|---|
| Time per workflow | 20–90 minutes depending on size and reviewer familiarity. | Seconds to minutes per file. Same on workflow #1 as on workflow #500. |
| Cost per workflow | $25–$150 of reviewer time, plus context-switch tax. | Flat monthly cost; marginal cost per workflow ~zero. |
| Coverage | Depends on the reviewer's expertise and patience that day. | Every rule fires on every workflow, every time. Recurring findings show up in the rollup. |
| Consistency | High variance. Two reviewers find different things in the same file. | Deterministic. Same file → same findings. |
| Bottleneck | Whoever is on the rota that week is the bottleneck. | No bottleneck. Async; runs in CI. |
| Catching credentials | Eyeballing dozens of XAML files for "password" — easy to miss in nested scopes. | Hardcoded value detection scans every Assign + activity input by default. |
| Catching swallowed exceptions | Hard — reviewer has to mentally trace Catch branches across every file. | Catch-without-log/rethrow detected automatically (ERR-005). |
| Auditor evidence | Reviewer notes, Confluence pages, Jira tickets — hard to reproduce later. | Signed audit-pack PDF with HMAC verification, framework coverage, recurring findings. |
| Exception lifecycle | "We talked about it in standup" or a Slack thread. | Exception requests, reviewer approval, expiry date, audit trail. |
| Reviewer judgment | High value — sees architectural smells, business-logic issues, intent. | Catches the mechanical stuff and frees humans to look at the parts that need judgment. |
The bottleneck is real
What manual review still owns
Reviewers see things a static analyser cannot: business-logic correctness, architectural fit, whether a workflow belongs in this project at all, whether the developer is trying to do the right thing the wrong way. A good reviewer can spot a 10-line workflow that should have been a 1-line workflow — no rule will catch that.
If your CoE has time for reviewers to look at every workflow and your governance program is one or two people reading 50 files a week, manual review is enough.
What manual review doesn't scale to
The moment a CoE crosses ~20 developers shipping workflows weekly, manual review becomes the bottleneck. Reviewers start rubber-stamping. Patterns get missed because the same reviewer read the same anti-pattern in 14 files and stopped flagging it on the 15th. The audit trail is "trust me, I looked".
Flowcerta doesn't replace the reviewer — it removes the mechanical work from their queue so they can spend their time on the architecture-level reviews that actually need human judgment. And it produces an auditor-grade artefact reviewers can't produce manually.
How to decide
The realistic stance is both, with a clear division of labour. Use Flowcerta as the first pass — it catches every hardcoded credential, every swallowed exception, every fragile selector, deterministically, in CI, before the workflow ever hits a reviewer's queue. Then let reviewers do what they're actually good at: judging whether the workflow makes sense.
The auditor-evidence problem is the one place Flowcerta replaces manual review outright. A signed PDF that any reviewer can verify offline is qualitatively different from "Clay said he looked."