What Is Evidence by Construction in Field Work?
Evidence by construction is a workflow design principle: the process cannot complete without capturing its own proof. Consent is recorded before capture begins, the visit is recorded with video, audio, GPS, and timestamps, and the work order closes with a digital signature. A work order without its evidence does not close cleanly, so the proof exists because the work happened, not because someone remembered to document it.
What the workflow is forced to capture
Proof before
Consent is recorded at the start of every session, before capture begins. There is no path into the work that skips it.
Proof during
The visit is captured on bodycam with video, audio, GPS coordinates, and timestamps, as the work happens rather than after it.
Proof at the close
The work order closes with a digital signature. Without the evidence behind it, the work order does not close cleanly.
What happens when evidence is missing
Under evidence by construction, missing paperwork is not an inconvenience to chase later. It is a signal. Every visit receives a fraud risk score from 0 to 100, and a visit that arrives without its required evidence scores higher for that reason alone. Low scores auto-approve and flow through. Elevated scores route to a supervisor for review. Scores above the critical threshold are blocked and escalated as a case, with an urgent alert fired and the complete evidence chain attached: video, transcript, GPS, consent, and signature.
The rule and the artifact
The evidence chain is the artifact: recorded consent, video and audio, GPS coordinates, timestamps, and a digital signature, sealed together with a cryptographic fingerprint so that any later alteration is detectable. Read the full definition.
Evidence by construction is the rule that guarantees the artifact exists. Instead of asking people to document their work, the workflow is built so the work cannot finish undocumented. The chain is what you get; the construction is why you always get it.
What makes the guarantee hold in practice
- Offline-first capture: the mobile app keeps recording without signal, and encrypted uploads queue and resume when connectivity returns, so "no coverage" never becomes "no evidence".
- Sealing: evidence is sealed with a cryptographic fingerprint into an immutable manifest, so the proof the workflow forced into existence cannot be quietly edited afterward.
- Controlled access: access to footage is role-gated and every access is itself logged, with a complete audit log of every upload, analysis, decision, and role change.
- Rules the client owns: scoring weights, keywords, and escalation thresholds are dashboard configuration, adjustable by the client's managers without developers.
- Humans on the decisions: every consequential decision is gated by a human, and every AI action is logged.
In the production configuration, missing evidence adds +35 points to the fraud risk score. The absence of proof is treated as a signal in its own right.
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Is evidence by construction the same as an evidence chain?
They are two sides of one design. The evidence chain is the artifact: consent, video and audio, GPS, timestamps, and digital signature sealed together. Evidence by construction is the rule that guarantees the artifact exists, because the workflow cannot complete without producing it.
What happens if a technician skips the capture?
The work order does not close cleanly, and the missing evidence raises the visit's fraud risk score. Elevated scores route to a supervisor for review, and scores above the critical threshold are blocked and escalated as a case.
Does the guarantee depend on connectivity?
No. The mobile app is offline-first, capture continues without signal, and encrypted uploads queue and resume automatically when connectivity returns.