Biotechnology AI agent · Deviation & CAPA
Deviation, CAPA & Change-Control AI Agent
Build the quality-event record behind a deviation — the investigation evidence, the scope-and-impact assessment, the CAPA and its effectiveness date — and run both reportability clocks for the quality unit that approves it.
- Typical delivery
- 4–6 weeks
- Deployment
- Your stack
- Quality unit
- Pre-closure
- After launch
- Agent Care
What this agent does
Assembles the event, never closes it
In
- 01
A deviation is raised, and the batch record, the equipment history and the events before it are pulled in.
- 02
An event is normalised across the quality, manufacturing and laboratory systems, each fact carried with its source.
Reason
- 03
A discovery time is entered by a person: when the information arrived, not when the record was opened.
- 04
A clock runs from that time — 3 working days under 21 CFR 314.81(b)(1), 45 calendar days under 21 CFR 600.14.
- 05
A scope is drawn past the batch that failed, to other batches and other products, as 21 CFR 211.192 requires.
Decide
- 06
A recurrence search runs on event signature rather than free text, so a third occurrence reads as a third.
- 07
A CAPA carries the effectiveness metric and window your own procedure states, and the evidence behind it.
Out
- 08
A change is read against the registered dossier, and what it may need filed is put in front of the reviewer.
- 09
Writes run only inside the approval boundaries agreed at implementation, and never onto an approved record.
Product statement
The agent assembles and makes no GMP determination; a named quality unit approves or rejects, and a named person signs the reportability decision.
Example workflow
One event, discovery to approval
- 1Event raisedLine record, laboratory result, complaint, excursion or contract-site notice
- 2Evidence assembledBatch records, equipment history, prior events and the entered discovery time, each with its source
- 3Assessment draftedScope and impact, candidate causes, CAPA draft, clock status and confidence
- 4Controls appliedCompleteness checks, 21 CFR 211.192 scope checks, clock checks and confidence threshold
No human action required
Stages 1 to 4 run unaided, and nothing is closed at any of them — the agent is assembling, and the quality unit's lane opens at the confidence gate.
Goes to the quality unit to approve.
Adds a second investigator read first.
Quality-unit approval
The event is held with its evidence, its open questions and the confidence.
Approve · Amend · Send to second review
Approved — closure authorised
- 6Quality system updatedOnly where write access and approval policy allow it
- 7Outcome evaluatedInvestigation completeness, effectiveness-check outcomes, days to report and inspection findings
Reopenings
A closure reopened lands on the quality unit's record, and on the file inspected later.
What should not run autonomously
Human approval stays in control
Outside the boundary — human approval required
8 items
- Closing the deviation or approving the investigation.
- Determining that an event is reportable.
- Signing or passing an effectiveness check.
- Setting the discovery time the clock runs from.
Automation boundary
Agent acts unaided
- ✓Assemble the event record and the evidence behind it.
- ✓Run both reportability clocks from the entered time.
- ✓Search prior events by signature, not by title.
- ✓Test the pack for completeness and hold it for the quality unit.
Writes stay inside the boundaries set at implementation, and never onto an approved record.
- Assigning the filing category for a change.
- Naming human error as the cause of an event.
- Notifying responsible officials under 21 CFR 211.180(f).
- Changes to investigation, CAPA or approval rules.
Example output
One event, annotated
Everything the agent assembles is attached to the record it was drawn from.
Quality-event output · single deviation
Illustrative example- Event
- Filling-line stoppage
- Assembled line
- A stoppage on this line was recorded twice before under other names
- Rule cited
- 21 CFR 211.192
- Source of time
- Operator-entered
- Confidence
- 88%
- Clock
- Runs from the entered time
As received
Taken from the quality, manufacturing and laboratory systems — nothing on this side is written by the agent.
Evidence used
- Prior events on the line
- Equipment history
- Batch record page
Why this rule
It is the scope the US rule sets, and how far it reaches is still the quality unit's call.
What the score decides
Below the configured threshold the event picks up a second investigator read before it goes up.
Action
ApproveAmendSend to second reviewValue
Where AI adds value
The same four claims, placed at the point in the workflow where each one applies.
Where the value lands
Value 01 – 04
Every event
From the quality record
Take what the laboratory hands over
The out-of-specification page works the result; this one starts where the event, the clock and the CAPA begin.
The clock starts at discovery
Not at record creation. A missed date is a dateable violation, and no later investigation repairs it.
Recurrence, not throughput
No regulator publishes a deviation cycle time or a CAPA backlog figure, and we will not borrow a vendor one.
Build an evidence trail
The event, the threshold it was read against and the officer who reported stay on the file.
Integrations
Typical integrations
Five system groups connect to the same agent. Which of them are in scope is decided in discovery.
Quality management
- Veeva Vault QMS
- TrackWise
- MasterControl
- ETQ Reliance
Manufacturing execution
- Werum PAS-X
- Syncade
- Tulip
- Rockwell PharmaSuite
Laboratory systems
- LabWare
- STARLIMS
- Empower
- LabVantage
Agent
Deviation, CAPA & change
- Reads the event
- Assembles the pack
- Holds for approval
Regulatory and records
- Veeva Vault RIM
- Document control
- archive
Observability & evaluation
- OpenTelemetry
- Langfuse
- Supported monitoring/evaluation sources
Integration availability depends on the client's existing systems and API access.
Agent controls
Six layers between the model and the record
The six are read from the outside in. What none of them stops is set out in the map below.
L6 · Outermost — last line of defence
Inward → L1 · closest to the model
- L1 – L2
- Test whether a pack may stand
- L3
- Puts the closure in the quality unit's hands
- L4 – L5
- Keep the event and the reportability line behind it
- L6
- Reverts to evidence assembly when signals degrade
How Nestack evaluates it
Evaluate the assembly workflow — not only the closed record.
Coverage runs the whole depth of the workflow, and every layer is cut by slice.
Surface — the record an inspector reads
- E1Final-output evaluationDid the pack carry the scope, the evidence and the clock status?
- E2Step-level evaluationDid the agent use the right event, the right scope rule and the current procedure?
- E3Tool evaluationDid it read and write the correct event and the correct field?
- E4Confidence calibrationDo low-confidence events actually attract more quality-unit amendments?
- E5Slice evaluationHow does performance change across specific event classes?
- E6Business outcomeHow many events were reopened, and how many effectiveness checks failed?
Floor — the outcome the site answers for
Failure modes
Where each failure originates in the agent
Seven failure modes, each placed at the stage where it originates.
Agent lifecycle
Direction of processing →
01 · Retrieval
1 mode
- EH-03
Prior events missed
The recurrence search never reached the earlier two.
Stage gathers
Batch records, equipment history and prior events
02 · Reasoning
2 modes
- EH-04
Scope stops at the batch
Other products the failure touched are left out.
- EH-06
Cause named as human error
Process and system causes are not excluded in writing.
Stage proposes
Scope, causes, CAPA draft, clock and confidence
03 · Tool / write
2 modes
- EH-02
Clock started at creation
Days are counted from the record, not the discovery.
- EH-05
Effectiveness window early
The check runs before the batches exist to support it.
Stage writes
Only where write access and approval policy allow it
04 · Output
1 mode
- EH-01
Change filed nowhere
A change needed a variation and got none.
Stage returns
The record the quality unit approves and FDA reads
05 · Change / Version
1 mode
- EH-07
Silent scope regression
A model or rule change narrows what is investigated.
Stage tracks
Model, prompt, clock rules and procedure mapping
- Sev-1 · acts on an approved record
- Sev-2 · a report misses its statutory date
- Sev-3 · evidence degrades, event holds
Affected slices
One event class can carry most of the failures
A site-level investigation-closure rate can look settled while a few event classes absorb most of the reopenings and the late reports. Nestack reports the reopening rate by event class, not only in total.
Slice performance — reported separately, not only in aggregate
Illustrative example| Slice | Failure rate | Lift | Lift vs. threshold | Status |
|---|---|---|---|---|
| Contract-site discoveries | 8.6% | 3.7× | Review | |
| Sterile and biologic events | 6.5% | 2.8× | Review | |
| Complaint-driven events | 3.9% | 1.7× | Watch | |
| Routine in-process deviations | 2.1% | 0.9× | Normal |
Bar: reopening-rate lift vs. the routine in-process baseline · scale 0–4.0× · tick marks the 2.0× review threshold
2 of 4 slices over threshold
Evidence-linked improvement
No cycle closes without a new test
The loop shuts when the late report is a regression case. That suite is what the next event worked is measured against.
Improvement cycle · five stages
Switchback — the path turns at Improve and returns at Learn
- 01
Detect
Reopening rate rises in one event class.
- 02
Diagnose
The finding somebody made on a Friday afternoon is read back until the cause narrows to one.
- 03
Improve
Any change goes out numbered, with the events that caused it attached.
- 04
Verify
One quality-event case still failing is enough to hold the release back.
- 05
Learn
One case joins the suite, one line joins the deviation record.
Learn → Detect
The return edge. The next detection is measured against a suite one case longer.
Typical build scope
Twelve workstreams across six weeks
The build scope read against the delivery timeline. Week structure follows the six-week plan — discovery, sources, event workflow, evaluation, integration, then production validation and handover.
Workstream
Week 1Week 2Week 3Week 4Week 5Week 6
- 01Quality-event workflow discovery and boundary work.Week 1
- 02Quality and MES source assessment.Week 1, Week 2
- 03Reportability, scope and CAPA procedure mapping.Week 1, Week 2
- 04Event ingestion and evidence normalisation.Week 2
- 05Assembly logic and source binding.Week 2, Week 3
- 06Confidence scoring and exception routing.Week 3
- 07Quality-unit approval workflow.Week 3, Week 4
- 08Quality-system and MES integration.Week 5
- 09Reportability and CAPA cases.Week 4, Week 5
- 10Guardrails and approval controls.Week 4
- 11Event-trail instrumentation.Week 5, Week 6
- 12Deployment, documentation and Agent Care handover.Week 6
12 workstreams · 6 weeks · bar shows the weeks a workstream is active — several run in parallel
Final scope and sequence confirmed in discovery
Engagement tiers
What each tier includes
Rows are the capabilities named in each tier's scope. Higher tiers include everything below them.
| Capability✓ in scope · — not at this tier | PilotOne site, one event class | ProductionProduction quality systems | AdvancedMultiple sites / regions |
|---|---|---|---|
| Introduced at Pilot | |||
| Assembly to your event record | ✓ | ✓ | ✓ |
| Quality-unit approval | ✓ | ✓ | ✓ |
| Investigation-completeness baseline | ✓ | ✓ | ✓ |
| Introduced at Production | |||
| Reporting by event class | — | ✓ | ✓ |
| Approval workflow in your systems | — | ✓ | ✓ |
| Approved write-back | — | ✓ | ✓ |
| Quality-system integration | — | ✓ | ✓ |
| Introduced at Advanced | |||
| Multi-site procedure sets | — | — | ✓ |
| Multi-stage quality approvals | — | — | ✓ |
| High event volume | — | — | ✓ |
| Multi-site reportability controls | — | — | ✓ |
| Build price | From $5,000 | From $8,000 | Custom quote |
- Final build price
- Confirmed after discovery based on integrations, workflow complexity, transaction volume, approval controls and deployment requirements.
- Separate from build
- Build pricing is separate from recurring Agent Care, which covers managed monitoring, evaluations, incidents and verified improvements after launch.
What we need from you
What you bring, and what we build with it
Each input maps to a piece of build scope and a week in the delivery timeline.
You bring
We build with it
01Your event record structure and procedures
→Event ingestion and evidence mapping
Week 102Representative closed investigations
→Assembly baseline, scope extraction and source binding
Week 203Your CAPA, clock and escalation procedure
→Procedure mapping and automation-boundary definition
Week 104Access to relevant APIs, feeds or exports
→Quality, MES and laboratory assessment, then integration setup
Week 205Investigations you would not want re-opened
→Clock cases and the evaluation suite
Week 406What no closure may leave unanswered
→Confidence scoring, exception routing, guardrails and approval controls
Week 307Named quality-unit reviewers to approve events
→Quality-unit approval workflow, then pilot and production validation
Weeks 5–6
Nothing else is required
Deployment, documentation and Agent Care handover are ours.
Delivery timeline
Four phases across six weeks
Each band spans the weeks its own phase actually takes, and that is why week five holds a pair.
Phase
W1
W2
W3
W4
W5
W6
- DiscoveryW1
- BuildW2 – W3
- EvaluateW4 – W5
- Pilot & LaunchW5 – W6
Week focus
W1Quality-event discovery, procedure mapping and the automation boundary
W2Quality-system integration and the assembly baseline
W3Assembly workflow, confidence logic and approval controls
W4Evaluation suite, guardrails and failure-mode testing
W5MES and laboratory integration, pilot events and targeted corrections
W6One quality cycle run under the quality unit, then Agent Care handover
- Reading the band
- Each bar spans only the weeks its work is named in. The week 5 overlap is two phases running, not padding.
- At the end of W6
- Once the event cycle validates, Agent Care assumes the running agent.
- Duration
- Six-week plan shown · typical delivery 4–6 weeks depending on scope confirmed in discovery.
Next step · Biotechnology AI agent
Build a quality-event agent around your quality unit.
Show us your deviation procedure, your quality system and who approves. Closing the deviation, deciding what is reportable and signing the effectiveness check stay with the quality unit. Draft EU/PIC/S GMP Annex 22 — consultation closed 7 October 2025 — says generative models should not be used in critical GMP applications, and this agent is built so that it is not one. If your batch-release work stops at the release package, this page picks the event up.
- Typical delivery
- 4–6 weeks
- Deployment
- Your quality system
- Quality unit
- Pre-closure
- After launch
- Agent Care available
Nestack Agents · Deviation, CAPA & change control
AGT-BT-14 · Agent Care available after launch