Board Assurance Summary - Autonomous Production Batch Release MRUN-2026-06-11-A

Organisation: Ironmark Precision Ltd � Period: 2026-06-11 07:00�07:11 UTC (batch reconciled T+0 end of shift) � Assurance basis: SE v0.1-draft evidence, scoped - see Reliance Boundary.

The assurance statement

An authorised autonomous process released 14 machined parts under delegated authority MD-5120. [env:0007 | authority.authority_context_id] [env:0075 | summary.released_count] - all 14 release events carry authority_context_id = MD-5120 with delegation receipt delrec:MD-5120/2026-04-15 granted by the Quality Director [env:0007 | authority.delegation_receipt_id] [env:0007 | authority.delegator_id] under part-release policy v5.1 in force throughout [env:0007 | authority.policy_version], against released engineering drawing IMP-4471 rev D and work instruction WI-4471 v5.1.

Every part remained within released engineering tolerance. Each of the 14 units passed three pre-release quality gates - critical-dimension conformance, statistical process control, and material-lot verification - evaluated before the part was dispositioned conforming, 42 control evaluations in total, all passed [env:0004 | controls.control_evaluation_phase] [env:0004 | controls.checks[*].control_result]. The tightest characteristic ran at 95.6% of the released tolerance band (part 3, SN IMP4471-0003, �25 H7 bore) [env:0013 | controls.checks[0].observed.tolerance_utilisation_ratio]; the lowest process capability observed was Cpk 1.41 against a 1.33 floor (part 3) [env:0013 | controls.checks[1].observed.cpk].

No exceptions requiring human intervention occurred. Exception count 0, scrap count 0, human-intervention count 0 [env:0075 | summary.exception_count] [env:0075 | summary.scrap_count] [env:0075 | summary.human_intervention_count]; no quality-engineer disposition was required under the policy rule for parts inside tolerance on a released drawing [env:0004 | authority.approval_status] [env:0004 | authority.approval_basis].

Evidence integrity validated. All 76 envelopes form an unbroken SHA-256 hash chain (re-verified at report generation), externally anchored at 5-minute intervals - 3 anchor receipts [env:0037 | anchoring.anchor_receipt_id]; emission ran fail-closed for release-boundary actions throughout [env:0007 | emission.emission_fail_posture]; liveness heartbeats present for every 60-second interval of the run with zero silent windows [env:0009 | liveness.liveness_status].

No cross-programme contamination detected. Cell-boundary and cross-order exposure indicators are false, on the stated basis that the cell processed only order PO-IRN-2026-4471-06 during the window [env:0074 | boundary_assessment.cross_order_exposure_indicator] [env:0074 | boundary_assessment.basis].

What the board should know

• External confirmation, not self-assertion: every release carries a three-rung acknowledgment ladder - transport (OPC-UA Good), machine (MES ACCEPTED), quality (QIF 3.0 / ISO 23952 inspection result CONFORMING) [env:0007 | acknowledgments[*]] - and the end-of-shift ISA-95 batch record reconciles 14 of 14 units against the production order [env:0073 | reconciliation.batch_record_count].
• Completeness is measured, not asserted: the in-scope population is independently defined (MES production order PO-IRN-2026-4471-06: 14 planned; finished-goods goods-receipt: 14 booked; scrap: 0) and evidence coverage is 14/14 = 100%, tamper-evident coverage 100% [env:0073 | reconciliation.evidence_population_ref] [env:0073 | reconciliation.evidence_coverage_ratio].
• Leading indicator: one part ran at 95.6% of its tolerance band; nothing out of tolerance, but characteristic headroom on the �25 H7 bore is worth a process-capability review before the next batch.
• Recommended position: continue autonomous release at current scope; no restriction indicated by this run’s evidence.

Reliance boundary

This report evidences this run only; it supports internal assurance, quality-management reliance, and customer source-surveillance for the stated period and population. It is not an airworthiness or conformity certification, and statements are bounded by the capture boundary declared in the Conformity Assessment Pack (�4). Signatures and anchor receipts in this golden trace are stubs pending the SE v0.1 signing profile.

Quality and Control View - MRUN-2026-06-11-A

1. Controls relevant and evidenced

Three preventive quality gates (control set ctl:part-release/v5.1) were evaluated pre-release for each unit [env:0004 | controls.control_evaluation_phase]:

Result: 42/42 control evaluations passed; 0 failed; 0 bypassed; 0 not_observed. Quality-engineer disposition was not_required under policy v5.1’s rule for characteristics inside tolerance on a released drawing revision [env:0004 | authority.approval_basis]; consequently no manual-disposition assertion is made or needed for this run - the control relied upon is the released-tolerance + verified-material-lot pair, both evidenced above.

2. Population and completeness (IPE basis)

• Population definition: MES production order PO-IRN-2026-4471-06 at 06:55Z (14 planned) reconciled against finished-goods goods-receipt GRN-2026-06-11-IMP4471 (14 booked, 0 scrap) - independently reconciled, not self-reported [env:0073 | reconciliation.population_basis].
• Coverage: envelopes 14/14 (100%); tamper-evident 100% [env:0073 | reconciliation.evidence_coverage_ratio].
• Sequence continuity: envelope sequence numbers 0001-0076 contiguous, no gaps (stream-internal proof); heartbeats at 60s intervals, zero silent windows (silence semantics) [env:0009 | liveness.declared_heartbeat_interval_s].

3. Evidence quality

• Origin/basis: runtime-observed on the shop-floor edge; release confirmations are quality-system confirmed (QIF 3.0 CONFORMING per unit) and source-system corroborated (ISA-95 batch record) [env:0007 | evidence_quality.corroboration_state] [env:0073 | evidence_quality.corroboration_state].
• Corroboration coverage decomposition: anchored 100% � quality-receipted 14/14 � provider-only 0.
• Point-in-time validity: policy v5.1 effective from 2026-05-01, in force at every event [env:0007 | authority.policy_version]; drawing rev D released 2026-03-20; delegation valid 2026-04-15 to 2026-12-31.
• Model context: sampling parameters recorded (temperature 0.2, top_p 0.9); replay claim scoped - reproducible in distribution, not in instance [env:0002 | model.sampling_parameters]; reasoning artifacts provider_withheld - disclosed, not silent [env:0002 | model.reasoning_artifact_availability].

4. Findings register

No exceptions, deficiencies, or open actions arise from this run. One observation (OBS-001, advisory): peak characteristic utilisation 95.6% with the lowest capability of the batch at Cpk 1.41 - recommend a process-capability review for the �25 H7 bore before the next batch. Owner: manufacturing process owner. Due: next production cycle.