{"actors":["Mechanical design engineer who defines component geometry and tolerances","Manufacturing engineer who supplies process-capability assumptions","Metrology engineer who defines datum and inspection schemes","Configuration authority who releases drawings and interface specifications"],"affected_objective":"Release a multi-part mechanical assembly design whose predicted clearance, alignment, preload, and functional dimensions remain within the specified tolerance envelope across modeled manufacturing variation.","arm":"ORDINARY_DIVERSE_P2","authority_safety":{"authorized_first_step":"A design engineer may run a shadow tolerance analysis on one archived assembly using only the drawings, process assumptions, and inspection information available before its original release; the analysis cannot change a released drawing or authorize production.","decision_authority":"The designated configuration authority retains drawing-release authority, while manufacturing, quality, and safety signatories retain their existing authority to reject an infeasible tolerance, datum scheme, inspection plan, or safety-relevant interface.","excluded_actions":["Automatic modification or release of controlled drawings","Substitution of predicted conformance for required inspection or qualification","Relaxation of safety-critical tolerances solely to improve predicted manufacturability","Use of process-capability distributions outside their documented equipment, material, supplier, or operating scope"],"halt_rollback":"Suspend use if tolerance chains are incomplete, correlations are unknown and consequential, capability inputs are stale, predicted results conflict repeatedly with measured assemblies, or the model omits a safety-relevant deformation or interface; revert to the existing drawing review and physical qualification process."},"baseline":"Designers allocate nominal dimensions, datums, fits, and component tolerances through handbook rules, worst-case calculations, spreadsheet stacks, supplier consultation, and drawing review. Interaction among manufacturing variation, correlated dimensions, assembly sequence, and compliance may remain unresolved until parts are produced and measured or assembled.","candidate_id":"predictive_precommitment_correction__engineering_design__ORDINARY_DIVERSE_P2","causal_chain":["A proposed assembly definition specifies nominal geometry, datums, fits, component tolerances, assembly sequence, and functional requirements.","Documented manufacturing-capability distributions, measurement uncertainty, material behavior, and permitted correlations are attached to the dimensional chain before drawing release.","A probabilistic what-if model propagates those inputs through the assembly geometry and estimates distributions for clearance, alignment, preload, and other functional dimensions.","The predicted distributions and uncertainty bounds are compared with the declared functional tolerance envelope and model-validity limits.","For a predicted gap, the design team evaluates traceable adjustments to nominal dimensions, tolerance allocation, datum structure, interface geometry, process selection, inspection requirements, or assembly sequence.","A release gate requires each material gap to be resolved by revision, additional measurement, independent analysis, controlled qualification, explicit escalation, or rejection of the design definition.","The configuration authority releases drawings only after required discipline signatories accept the disposition; the model does not replace their approval or downstream inspection.","As-built component and assembly measurements are paired with the frozen prediction, assumptions, and model version to test calibration and restrict or update later analyses."],"cell_id":"predictive_precommitment_correction__engineering_design","consequence":"An assembly released without an integrated prediction of accumulated variation can reach fabrication with insufficient clearance, excessive preload, interface misalignment, or an unmeasurable datum scheme, making correction dependent on rework, part replacement, tooling changes, or drawing revision.","diversity_from_prior_proposals":"This opportunity concerns dimensional-variation allocation before controlled drawing release, not equipment placement, motion-path authorization, operational load transfer, or live hazard management. Its adjustable variables are product geometry, datum architecture, tolerance budgets, process choice, and inspection requirements; its causal path runs from manufacturing variation through accumulated assembly dimensions to fit and function.","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","intervention":"Place an uncertainty-bearing probabilistic tolerance-stack review before controlled drawing release. It previews how specified component variation, datum choices, assembly sequence, and process capability combine at functional interfaces; predicted gaps trigger changes to geometry, tolerance allocation, manufacturing process, inspection, or sequencing while the design definition remains adjustable. Preserve frozen predictions and later measurements for calibration.","mechanism_mapping":[{"counterfactual_removal":"Without propagation of the proposed dimensional scheme and manufacturing variation, the team lacks a pre-release estimate of the resulting functional-dimension distribution.","mechanism_slug":"precommitment_what_if_simulation","role":"Propagates alternative nominal dimensions, tolerance allocations, datum schemes, assembly sequences, and capability assumptions into predicted assembly outcomes before release."},{"counterfactual_removal":"Without a release condition tied to predicted gaps and uncertainty, an adverse analysis can remain advisory while the same drawings proceed to fabrication.","mechanism_slug":"staged_commitment_gate","role":"Conditions drawing release on documented resolution or accountable escalation of predicted functional-envelope violations."},{"counterfactual_removal":"Without comparison to later measurements, incorrect distributional assumptions, omitted correlations, and model drift remain unavailable for correction.","mechanism_slug":"forecast_error_backtest","role":"Compares frozen pre-release distributions with component and assembly measurements to recalibrate assumptions or narrow the model's validity boundary."}],"nearest_rivals":["Deterministic worst-case tolerance-stack calculation","Designer-selected geometric tolerancing based on handbooks and prior products","Supplier design-for-manufacture review without assembly-level probabilistic propagation","Prototype build followed by fit checks and drawing changes","End-of-line inspection and selective assembly after parts have been produced"],"negative_tests":{"intervention_falsifier":"In a preregistered archived-design replay, the gated probabilistic analysis does not improve correct pre-release classification of functional interfaces over the existing review, or its recommended adjustments produce additional held-out fit, preload, alignment, manufacturability, or inspectability violations.","problem_falsifier":"Archived release packages show that every consequential dimensional interaction is already represented, dispositioned, and cheaply adjustable before release through the baseline review, with later nonconformance attributable only to departures from the released specification rather than unmodeled tolerance accumulation.","risks":["Incorrect or nonrepresentative capability distributions can create false confidence or unnecessary design changes.","Assumed independence can conceal correlated variation caused by shared tooling, setups, datums, or thermal conditions.","A geometry change that improves one stack may degrade another interface not included in the model.","Probabilistic acceptability may obscure a safety-critical worst-case condition that still requires deterministic treatment.","Teams may widen functional envelopes or choose favorable inputs to pass the gate.","Added analysis may delay release when evidence about process capability is incomplete.","Measured outcomes may be selectively sampled, weakening calibration.","The model may omit deformation, wear, assembly force, or environmental effects that dominate rigid dimensional variation."],"strongest_counterevidence":"For low-volume or safety-critical assemblies with poorly characterized processes, deterministic limits plus physical qualification may be more dependable than a probabilistic model whose input distributions and correlations cannot be justified."},"next_evidence_step":"Choose one archived multi-part assembly with recorded component and final-assembly measurements. Freeze the functional envelopes, model form, input rules, uncertainty treatment, and disposition thresholds before examining held-out assembly outcomes. Reconstruct only information available before drawing release, run the review in shadow mode, and compare its classifications and proposed adjustments with the baseline release record and held-out measurements. Record missed violations, false blocks, calibration error, unsupported inputs, omitted chains, and cases outside the validity boundary; do not alter any controlled drawing.","observable_state":"Before release: drawing revision, nominal dimensions, tolerance limits, datum references, interface definitions, assembly sequence, functional envelopes, process and supplier capability data, assumed correlations, measurement uncertainty, material and temperature assumptions, predicted functional-dimension distributions, uncertainty bounds, sensitivity rankings, validity flags, and dispositions. After fabrication: component measurements, assembly measurements, observed clearances and alignment, assembly forces or preload where instrumented, nonconformances, rework, substitutions, and qualification results.","prior_art_status":"UNSEARCHED","problem":"A multi-part mechanical assembly may be released for tooling and fabrication while its component tolerances, datum choices, process variation, and assembly sequence have been reviewed separately rather than propagated into a common prediction of functional fit. Accumulated variation can therefore become consequential only when produced parts are inspected or assembled, after geometry and process commitments are costlier to change.","proposal_index":2,"remaining_contrastive_claim":"The proposal is specifically a pre-release conversion of predicted dimensional accumulation into changes to the controlled product definition; unlike deterministic stack checks, prototype discovery, or end-of-line inspection, it represents process variation and uncertainty, gates release on the result, and reconnects as-built measurements to calibration.","revision_record":{"claim_changes":["Initial version makes no novelty, prevalence, demand, or effect-size claim."],"conceptual_changes":["Initial version instantiates predictive precommitment correction at the controlled drawing-release boundary for multi-part assembly variation."],"evidence_changes":["No external evidence or prior-art search was used."],"operational_changes":["Initial evidence is limited to a shadow replay on an archived assembly and cannot change controlled drawings or authorize production."],"parent_version":null,"progress_targets_addressed":["Independent affected problem and causal path","Explicit pre-release commitment boundary","Observable functional envelope and adjustable design variables","Prediction and uncertainty tied to a release disposition","Human configuration and discipline authority preserved","Problem and intervention falsifiers","Bounded calibration-oriented evidence step"]},"schema_version":1,"structural_mapping":[{"archetype_element":"Commitment point after which correction becomes expensive or disruptive","domain_realization":"Controlled drawings and interface specifications are released for tooling, procurement, and fabrication."},{"archetype_element":"Intended action specification","domain_realization":"Release the proposed nominal geometry, tolerance allocation, datum scheme, manufacturing processes, inspection requirements, and assembly sequence."},{"archetype_element":"Target state and tolerance envelope","domain_realization":"Specified bounds for assembled clearance, interference, alignment, preload, travel, sealing, and other functional dimensions."},{"archetype_element":"Predictive consequence model with context inputs","domain_realization":"A probabilistic dimensional-variation model using drawing geometry, process-capability distributions, correlations, measurement uncertainty, material behavior, and assembly sequence."},{"archetype_element":"Predicted gap signal and uncertainty","domain_realization":"A predicted functional-dimension distribution or uncertainty interval that crosses a specified limit or cannot be classified within the model-validity boundary."},{"archetype_element":"Adjustable control variables and precorrection rule","domain_realization":"Revise nominal dimensions, component tolerance budgets, datum architecture, interface geometry, process choice, inspection requirements, or assembly sequence when a declared threshold is crossed."},{"archetype_element":"Gateable commitment","domain_realization":"Controlled drawing release waits for revision, additional evidence, independent analysis, qualification, escalation, or rejection of each material predicted gap."},{"archetype_element":"Post-action calibration return path","domain_realization":"Frozen predictions and assumptions are paired with as-built component and assembly measurements for forecast-error review."},{"archetype_element":"Validity and fallback safeguards","domain_realization":"Documented scope limits, safety-critical worst-case checks, discipline signoff, configuration control, input provenance, drift review, and reversion to conventional review and physical qualification."}],"title":"Probabilistic Tolerance Precorrection Before Assembly Drawing Release","version":0}