Manufacturing AI agent · PPAP & APQP
Supplier-Quality, PPAP & Corrective-Action AI Agent
Assemble the PPAP package against your customer's own requirements, hold the APQP gates, alert clocks and concern deadlines in one state, and stop at the warrant — a named official signs it.
- Typical delivery
- 4–6 weeks
- Deployment
- Your stack
- Named signatory
- Pre-submission
- After launch
- Agent Care
What this agent does
Assembles the package, not the warranty
In
- 01
A programme opens, and the agent pulls that customer's requirement set at the version now in force.
- 02
An element arrives, and its revision, date and part number are normalised against the submission.
Reason
- 03
A package is assembled to PPAP 4th Edition of 2009, with the control plan under CP-1 of March 2024.
- 04
A customer overlay applies: Ford's CSR of 15 June 2026 and GM's of 30 October 2025 do not match.
- 05
An alert or SREA is live, and its remaining quantity and expiry date are counted down, not assumed.
Decide
- 06
A phase gate falls due, and the APQP deliverables behind it are checked against the customer's dates.
- 07
A concern is raised, and the 24-hour, 48-hour and 15-day clocks run on the customer's calendar.
Out
- 08
A warrant is ready, and it is held with its element index, its gaps and its evidence for signature.
- 09
A write-back runs only inside the approval boundaries agreed during implementation.
Product statement
The agent assembles and checks; a named supplier official signs the warrant, and the customer's engineer approves or rejects it.
Example workflow
One submission, part to disposition
- 1Part or concern receivedCustomer release, APQP programme, drawing revision or concern notice
- 2Requirements assembledFord's CSR of 15 June 2026, GM's of 30 October 2025, and the AIAG manuals in force
- 3Package assembledElement index, gaps, dates and confidence
- 4Controls appliedElement completeness, capability-index checks, deadline checks and confidence threshold
No human action required
Stages 1 to 4 run unaided, and nothing is submitted at any of them — the agent is assembling, and the engineer's lane opens at the confidence gate.
Goes to the supplier-quality engineer.
Adds a launch-team read first.
Engineer review
The package is held with its element index, its gaps and the confidence.
Approve · Correct · Send to launch review
Signed — released to submit
- 6Customer portal updatedOnly where write access and approval policy allow it
- 7Outcome evaluatedElement corrections, customer disposition codes, missed clocks and concerns reopened after closure
Corrections
Each engineer correction is counted in the evaluation.
What should not run autonomously
Human approval stays in control
Outside the boundary — human approval required
8 items
- Signing the Part Submission Warrant for a part.
- Declaring a customer submission approved or rejected.
- Granting a deviation, a waiver or a concession.
- Declaring a customer's quality concern closed.
Automation boundary
Agent acts unaided
- ✓Assemble the package element by element from the record.
- ✓Check each element against the customer's stated requirement.
- ✓Track the phase dates, the alert expiry and the concern.
- ✓Flag the gaps, and hold the package for the named engineer.
Any write happens inside the boundaries agreed at implementation, never ahead of signature.
- Notifying a customer that nonconforming stock shipped.
- Committing to a capacity or capability position.
- Implementing a process change before its approval.
- Changes to requirement sets, thresholds or boundaries.
Example output
One submission element, annotated
Everything the agent assembles is attached to the requirement it was checked against.
Package output · single element
Illustrative example- Element
- Process capability
- What was checked
- Studies attached for the characteristics on the customer's list
- Reported index
- Ppk 1.41
- Requirement source
- Ford CSR, 15 June 2026
- Confidence
- 91%
- Disposition
- Held for the named signatory
As received
Taken from the study output and the customer's requirement document — nothing on this side is inferred.
Evidence used
- Capability study output
- Customer requirement
- Control-plan entry
Why this reading
The customer specifies Ppk, and the study reports Ppk and a person still decides.
What the score decides
Below the configured threshold the package picks up a launch-team read before it.
Action
ApproveCorrectSend to launch 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 submission
From the programme record
Check against the requirement
Draw on the customer's own requirement set — Ford at 15 June 2026, GM at 30 October 2025.
The warrant is a warranty
Routine elements arrive assembled, indexed and checked against the requirement.
Send review to the exposed
Gaps, expiring alerts and near-deadline concerns are marked, so the engineer's read starts where exposure sits.
Build an evidence trail
The element, the requirement it was checked against and the engineer who approved stay on the submission.
Integrations
Typical integrations
Five system groups connect to the same agent. Which of them are in scope is decided in discovery.
Customer portals
- Ford Supplier Portal
- CMMS3
- GM SupplyPower
- supplier portals
Quality and CAPA
- ETQ Reliance
- Intelex
- Plex Quality
- IQS
PLM and drawings
- Teamcenter
- Windchill
- 3DEXPERIENCE
- Aras
Agent
Supplier quality & PPAP
- Reads the requirement
- Assembles the package
- Holds for signature
Measurement and SPC
- PolyWorks
- Zeiss Calypso
- InfinityQS
- Minitab
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 warrant
The layers run six deep, each inside the last. What clears them all appears in the map below.
L6 · Outermost — last line of defence
Inward → L1 · closest to the model
- L1 – L2
- Test whether a package may stand
- L3
- Puts the release in an engineer's hands
- L4 – L5
- Keep the element and the requirement behind it
- L6
- Narrows to package assembly when signals degrade
How Nestack evaluates it
Evaluate the submission workflow — not only the finished package.
Coverage runs the whole depth of the workflow, and every layer is cut by slice.
Surface — the package the customer sees
- E1Final-output evaluationDid each element match the requirement it was checked against?
- E2Step-level evaluationDid the agent use that customer's current requirement document and level?
- E3Tool evaluationDid it read and write the correct part, programme and portal record?
- E4Confidence calibrationDo low-confidence packages actually attract more engineer corrections?
- E5Slice evaluationHow does performance change across specific customer programmes?
- E6Business outcomeHow many packages came back rejected, or reopened after the customer signed off?
Floor — the outcome the plant answers for
Failure modes
Where each failure originates in the agent
Seven failure modes, placed at the stage each one originates.
Agent lifecycle
Direction of processing →
01 · Retrieval
1 mode
- QP-03
Superseded requirement
Requirements read from a prior CSR revision.
Stage gathers
Requirement sets, drawings, studies and phase dates
02 · Reasoning
2 modes
- QP-04
Wrong capability statistic
Cpk reported where the customer requires Ppk.
- QP-06
Generic element list
One customer's overlay applied to another's part.
Stage proposes
Element index, gaps, phase dates and confidence
03 · Tool / write
2 modes
- QP-02
Readiness declared early
Checklist completeness taken as approval.
- QP-05
Alert counter unwatched
Shipments continue past an alert's quantity.
Stage writes
Only where write access and approval policy allow it
04 · Output
1 mode
- QP-01
Unsupported warrant
The package cannot support what was signed.
Stage returns
The package the engineer signs and the customer reads
05 · Change / Version
1 mode
- QP-07
Silent rule regression
A requirement update changes what the check passes.
Stage tracks
Model, prompt, requirement sets and thresholds
- Sev-1 · submitted outside the boundary
- Sev-2 · a wrong element reaches the customer
- Sev-3 · source degrades, package to review
Affected slices
A clean total can sit on one bad supplier
A first-pass approval rate across a supply base can look acceptable while a few suppliers carry most of the rejected elements. Nestack reports the rejected-element rate by slice, not only in total.
Slice performance — reported separately, not only in aggregate
Illustrative example| Slice | Failure rate | Lift | Lift vs. threshold | Status |
|---|---|---|---|---|
| New tooling at a new source | 8.1% | 3.7× | Review | |
| Sub-tier PPAP evidence | 5.6% | 2.5× | Review | |
| Post-SREA process changes | 3.4% | 1.5× | Watch | |
| Carry-over parts at volume | 1.6% | 0.7× | Normal |
Bar: rejected-element-rate lift vs. carry-over-part baseline · scale 0–4.0× · tick marks the 2.0× review threshold
2 of 4 slices over threshold
Evidence-linked improvement
A cycle ends when a test exists
A cycle is done when the rejected submission has become a case the next release must pass. That suite is what the next package assembled is measured against.
Improvement cycle · five stages
Switchback — the path turns at Improve and returns at Learn
- 01
Detect
Rejected-element rate rises for one supplier.
- 02
Diagnose
The package that came back on the day of the build is read until the cause narrows to one.
- 03
Improve
Stamp the change with a version; the submissions behind it are filed against it.
- 04
Verify
Each affected case runs a second time, and one red result halts the release.
- 05
Learn
It stays as a standing test, and the submission rules are rewritten alongside it.
Learn → Detect
The return edge. What is detected next is measured against the longer suite.
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, submission workflow, evaluation, integration, then production validation and handover.
Workstream
Week 1Week 2Week 3Week 4Week 5Week 6
- 01Submission workflow and boundary discovery and boundary definition.Week 1
- 02Portal, PLM and quality-source assessment.Week 1, Week 2
- 03Customer-requirement and level mapping and rule mapping.Week 1, Week 2
- 04Element ingestion and normalisation.Week 2
- 05Package assembly and requirement binding.Week 2, Week 3
- 06Confidence scoring and gap routing.Week 3
- 07Engineer approval workflow.Week 3, Week 4
- 08Portal and quality-system integration.Week 5
- 09Element and deadline cases.Week 4, Week 5
- 10Guardrails and submission controls.Week 4
- 11Submission-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 customer, one programme | ProductionProduction quality systems | AdvancedMultiple customers / plants |
|---|---|---|---|
| Introduced at Pilot | |||
| Assembly to your requirement sets | ✓ | ✓ | ✓ |
| Engineer approval | ✓ | ✓ | ✓ |
| Element-completeness baseline | ✓ | ✓ | ✓ |
| Introduced at Production | |||
| Reporting by supplier | — | ✓ | ✓ |
| Approval workflow in your systems | — | ✓ | ✓ |
| Approved portal write-back | — | ✓ | ✓ |
| Supplier-portal integration | — | ✓ | ✓ |
| Introduced at Advanced | |||
| Multi-customer requirement sets | — | — | ✓ |
| Multi-stage launch approvals | — | — | ✓ |
| High programme volume | — | — | ✓ |
| Multi-customer requirement controls | — | — | ✓ |
| Build price | From $5,000 | From $8,000 | Custom quote |
- Final build price
- Confirmed after discovery based on integrations, workflow complexity, submission 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 customer requirement sets and levels
→Customer-requirement and submission-level mapping
Week 102Representative submitted packages
→Assembly baseline, element indexing and requirement binding
Week 203Your phase gates and internal deadlines
→Phase-gate, clock and automation-boundary definition
Week 104Access to relevant APIs, feeds or exports
→Portal, PLM and quality-source assessment, then integration setup
Week 205Submissions you would not want warranted
→Rejection cases and the evaluation suite
Week 406What no warrant may go in without
→Confidence scoring, gap routing, guardrails and approval controls
Week 307Named engineers and authorised signatories
→Engineer 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
The phases are plotted on real elapsed weeks, so the week-5 overlap is work, not padding.
Phase
W1
W2
W3
W4
W5
W6
- DiscoveryW1
- BuildW2 – W3
- EvaluateW4 – W5
- Pilot & LaunchW5 – W6
Week focus
W1Submission workflow discovery, requirement mapping and the boundary
W2Source integration and the assembly baseline
W3Assembly workflow, confidence logic and approval controls
W4Evaluation suite, deadline checks and failure-mode testing
W5Portal integration, pilot submissions and targeted corrections
W6One launch programme run under the supplier-quality engineer, then Agent Care handover
- Reading the band
- Each bar covers the weeks its own work is named in, and no others.
- At the end of W6
- The final checks clear on live submissions and monitoring moves to Agent Care.
- Duration
- Six-week plan shown · typical delivery 4–6 weeks depending on scope confirmed in discovery.
Next step · Manufacturing AI agent
Build a supplier-quality agent around your customer's requirements.
Show us one customer's requirement set, your phase gates and who signs. The assembly, the checks and the clocks are ours — the warrant, the disposition and the closure stay with your engineer.
- Typical delivery
- 4–6 weeks
- Deployment
- Portals and PLM
- Named signatory
- Pre-submission
- After launch
- Agent Care available
Nestack Agents · Supplier quality & PPAP
AGT-MFG-14 · Agent Care available after launch