{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp12_substrate_denial72_20260805","cell_id":"pareto_frontier_navigation__accounting_auditing","arm":"CONSTRAINED_HIGH","candidate_id":"pareto_frontier_navigation__accounting_auditing__CONSTRAINED_HIGH","decision":"PROPOSAL","abstention_reason":null,"proposal":{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp12_substrate_denial72_20260805","cell_id":"pareto_frontier_navigation__accounting_auditing","arm":"CONSTRAINED_HIGH","candidate_id":"pareto_frontier_navigation__accounting_auditing__CONSTRAINED_HIGH","proposal_index":1,"version":0,"title":"Frontier-Calibrated Composite Sampler for Bulk-Liquid Inventory Audits","problem":"A storage tank containing a thermally or compositionally stratified liquid is reconciled by multiplying measured liquid volume by a density obtained from a single accessible depth. The resulting book quantity can be wrong even when the level and single sample are measured correctly, because that sample may not represent the tank's depth-weighted density. Sampling every depth or transferring the tank contents could reduce this uncertainty but would increase material withdrawal, handling time, contamination risk, and worker exposure.","actors":["Inventory custodian","Independent inventory auditor","Financial controller","Tank operator","Environmental, health, and safety authority","Stratified bulk liquid","Tank, level gauge, sampling ports, and calibration vessel"],"observable_state":"Repeated depth samples from the same tank show materially different analog hydrometer readings or temperatures, and quantities calculated from top-only density measurements disagree with receipt-minus-issue reconciliation or a reference composite measurement beyond the predeclared instrument uncertainty. The observation concerns physical readings and reconciliation differences, not an inferred fraud classification.","consequence":"An unrepresentative density measurement can create an unsupported inventory quantity, obscure real loss or gain, and cause the auditor either to accept a misstated balance or require an unnecessarily disruptive full-tank verification.","affected_objective":"Obtain an independent, representative physical measurement supporting bulk-liquid inventory quantity while limiting sampling uncertainty, withdrawn material, audit duration, contamination, and exposure.","intervention":"Develop a portable, non-powered sampling manifold that connects only to a nonhazardous surrogate tank during the first trial. Calibrated fixed-volume chambers draw plugs from selectable depths and discharge them into one mechanically agitated composite vessel. Interchangeable hard-stopped port plates embody several feasible sampling geometries, such as one, three, five, or seven depths. In stratified surrogate trials, compare each plate on reference-measurement error, total withdrawn volume, elapsed handling time, and number of connections. Remove any plate that is no better on every measured objective and worse on at least one. Subject the remaining plates to a leakage and maximum-withdrawal guardrail, then choose a knee configuration only as a provisional physical design. That plate fixes the depth pattern and aliquot volumes mechanically. An analog hydrometer, thermometer, sight gauge, and calibrated vessel then produce a representative composite-density measurement without software, automated inference, or reporting being required for the measurement effect.","structural_mapping":[{"archetype_element":"Option Set","domain_realization":"Interchangeable port plates implementing distinct numbers, locations, and fixed volumes of depth aliquots."},{"archetype_element":"Objective Dimensions","domain_realization":"Reference-density error, withdrawn liquid volume, handling time, connection count as an exposure proxy, and contamination events."},{"archetype_element":"Feasibility Constraints","domain_realization":"Compatible wetted materials, closed transfer, maximum permitted withdrawal, leak-free operation, reachable ports, and an EHS-approved surrogate liquid."},{"archetype_element":"Dominance Criterion","domain_realization":"Plate A dominates plate B only if A is no worse within stated measurement uncertainty on every objective and is clearly better on at least one."},{"archetype_element":"Frontier Map","domain_realization":"A bounded test table of nondominated physical port plates and their directly observed measurements; no weighted aggregate score is required."},{"archetype_element":"Preference or Priority Rule","domain_realization":"After safety and withdrawal limits are satisfied, provisionally select the frontier plate nearest the bend where further reduction in reference error requires a sharply larger withdrawal or connection burden."},{"archetype_element":"Tradeoff Rationale","domain_realization":"The selected plate records the accepted physical sacrifice between representativeness and sampling intrusion rather than treating the lowest-error configuration as automatically preferable."},{"archetype_element":"Implementation Commitment Record","domain_realization":"The chosen depth and aliquot pattern is embodied in a keyed, hard-stopped plate that cannot open unselected branches during the test."},{"archetype_element":"Recheck Trigger","domain_realization":"Repeat the physical comparison if tank geometry, liquid family, allowable withdrawal, sampler materials, port accessibility, or instrument uncertainty changes."}],"mechanism_mapping":[{"mechanism_slug":"dominance_screening","role":"Eliminates sampling plates that consume at least as much material, time, and connection burden while producing no better reference accuracy than another feasible plate.","counterfactual_removal":"Without dominance screening, an unnecessarily intrusive plate could remain eligible; the sampler would still measure physically, but the archetype's removal of false tradeoffs would be lost."},{"mechanism_slug":"pareto_frontier_analysis","role":"Separates technically inferior sampling geometries from genuine choices between measurement accuracy and physical intrusion.","counterfactual_removal":"Without the frontier comparison, selecting a plate would collapse to an unexplained single-objective choice and would not preserve the supplied archetype."},{"mechanism_slug":"knee_point_analysis","role":"Supplies a provisional selection rule among nondominated plates when error improvements begin requiring substantially more withdrawal or handling.","counterfactual_removal":"The nondominated plates could still be identified, but no default physical configuration would be selected; a separate explicit preference would be required."},{"mechanism_slug":"scenario_sensitivity_sweep","role":"Repeats tests across bounded surrogate stratification profiles to determine whether apparent dominance depends on one liquid arrangement.","counterfactual_removal":"A selected plate might be efficient only for one profile, making its physical configuration fragile even though its measurement process would remain operative."}],"causal_chain":["Thermal or compositional stratification makes a single-depth density reading potentially unrepresentative of the tank contents.","Several physically buildable depth-and-aliquot plates create a feasible option set with different accuracy and intrusion profiles.","Surrogate-tank trials expose each plate to the same stratification profiles and directly measure reference error, withdrawal, time, connections, and leakage.","Dominance screening removes plates that impose additional physical burden without a compensating measurement benefit.","Safety and maximum-withdrawal constraints exclude efficient-looking but unacceptable plates before selection.","A provisional knee rule selects one remaining plate while making the accepted error-versus-intrusion tradeoff explicit.","Keyed channels and fixed-volume chambers physically impose the selected depth weighting and prevent accidental substitution of another sampling pattern.","The collected aliquots mix in a common vessel, and analog instruments directly measure the composite density and temperature.","Combining the representative physical density reading with an independently observed tank level yields a separately checkable inventory-quantity basis; software or reporting may record it but does not create the measurement."],"baseline":"The concrete baseline is a level reading paired with one manually collected top or accessible-port sample and an analog density measurement. A secondary baseline is using a previously recorded standard density without sampling. Both require less equipment but can miss depth variation.","nearest_rivals":["A full-depth thief sampler that collects one continuous vertical column; it may represent depth with fewer connections but can be incompatible with tank geometry and may withdraw or contaminate more material.","Multiple independent depth samples analyzed separately; this preserves diagnostic detail but increases containers, handling, exposure points, and reconciliation work.","A recirculation-and-mixing operation followed by one sample; it can homogenize the liquid but expends energy, disturbs the stored material, and may be unavailable during an audit.","An analog hydrostatic-pressure inventory measurement; it may estimate mass without density sampling but depends on tank geometry, pressure access, vapor-space reference, and calibration.","A complete tank transfer to a calibrated weigh vessel; it supplies a stronger reference measurement but is substantially more intrusive and serves primarily as a validation rival rather than a routine audit method."],"remaining_contrastive_claim":"Unlike a single-depth sample, the proposed rig changes the physical sampling geometry so the measured liquid is a fixed composite of several depths. Unlike unrestricted multi-depth sampling, its configuration is chosen only after empirical removal of physically dominated patterns. The defensible claim is limited to testing whether this embodied frontier choice can improve representativeness without adopting an avoidably burdensome sampling configuration; no novelty or effect-size claim is made.","authority_safety":{"decision_authority":"The tank owner and financial controller may authorize an audit-method study only after the responsible EHS authority approves the liquid, materials, containment, pressure limits, and operating boundary. The independent auditor controls whether resulting evidence is acceptable for audit purposes.","authorized_first_step":"Construct and test a low-pressure prototype on a bench-scale transparent surrogate tank containing nonhazardous, nonvolatile liquids with deliberately varied density layers. Compare four predeclared port plates against a fully mixed reference sample.","excluded_actions":["Connecting the prototype to an operational, pressurized, flammable, toxic, reactive, or food-grade tank","Opening or modifying tank penetrations","Changing recorded inventory or issuing an audit conclusion from surrogate results","Using human exposure as an experimental variable","Selecting a plate that violates the leakage or maximum-withdrawal guardrail","Treating a computed frontier or knee as authority to bypass auditor or EHS judgment"],"halt_rollback":"Stop immediately for leakage, unstable support, incompatible seals, unexpected pressure, layer cross-contamination before sampling, or readings outside instrument range. Isolate and drain the bench apparatus into its labeled recovery container, retain the existing audit method, and revise or discard the prototype; no production process or accounting record is altered."},"negative_tests":{"strongest_counterevidence":"Across representative surrogate profiles, the single accessible-depth sample agrees with the fully mixed reference within combined instrument uncertainty, or errors arise primarily from level-gauge calibration rather than density stratification. Either result would undercut the proposed problem mechanism.","problem_falsifier":"The problem is falsified for the bounded use case if depth-resolved physical measurements show no repeatable density or temperature variation capable of changing the supported quantity beyond the predeclared materiality and instrument-uncertainty threshold.","intervention_falsifier":"The intervention is falsified if no composite plate is nondominated relative to the single-sample baseline, if its reference error is not repeatably lower when stratification is present, or if the apparent frontier or selected knee changes arbitrarily across replicate trials within the bounded surrogate scenarios.","risks":["Cross-contamination between depth channels can create a falsely representative composite.","Fixed equal-volume aliquots may not correspond to tank volume by depth when cross-sectional area varies.","Hydrometer and thermometer uncertainty can produce false dominance between near-equal plates.","The common vessel may not mix adequately before measurement.","Additional connections can introduce leaks, spills, or worker contact.","A surrogate stratification profile may not represent the physical behavior of an operational liquid.","Important objectives such as cleanability, material compatibility, or diagnostic localization could be omitted and make a plate appear falsely dominated.","A visually convenient knee may be mistaken for an objective optimum despite unresolved value choices."]},"next_evidence_step":"Run a preregistered bench study with four physical port plates, at least three deliberately different nonhazardous stratification profiles, randomized plate order, replicate draws, and blinded comparison to a fully mixed reference. Record raw analog readings, collected mass or volume, elapsed time, connection count, leakage, and instrument uncertainty. The bounded decision is only whether a stable nondominated set exists and whether one provisional plate merits a separately authorized engineering-safety review.","prior_art_status":"UNSEARCHED","diversity_from_prior_proposals":"No other proposals or experiment cells were inspected under runtime isolation. The candidate is differentiated only within the supplied record by using a mechanically fixed, multi-depth composite-density instrument rather than a software frontier, reporting system, incentive, or audit workflow.","revision_record":{"parent_version":null,"progress_targets_addressed":["Construct one causally defensible accounting-and-auditing application of Pareto Frontier Navigation.","Make measurement instrumentation the primary causal substrate.","Preserve dominance filtering, frontier construction, explicit frontier selection, guardrails, and recheck logic.","Bound authority to a reversible nonhazardous surrogate test.","State counterevidence, falsifiers, rivals, and substrate counterfactuals without novelty or effect-size claims."],"conceptual_changes":["Translated abstract frontier options into interchangeable physical depth-sampling plates.","Separated empirical dominance from the normative choice among nondominated sampling configurations.","Defined the accounting consequence as unsupported bulk-inventory measurement rather than fraud detection."],"operational_changes":["Embodied the selected configuration in keyed channels and fixed-volume chambers.","Restricted the first step to a low-pressure transparent surrogate tank.","Added leak, withdrawal, compatibility, and containment guardrails."],"evidence_changes":["Specified direct comparison with fully mixed reference samples.","Required replicate trials across several stratification profiles and explicit instrument uncertainty.","Included single-depth sampling and other physical verification methods as rivals."],"claim_changes":["Limited the claim to whether representative measurement can be obtained without an avoidably dominated physical burden.","Made no claim about novelty, prevalence, demand, or effect size.","Kept prior-art status unsearched."]},"substrate_contract":{"primary_allowed_process":"MEASUREMENT_INSTRUMENTATION","counterfactual_independence":"If all software, algorithms, databases, dashboards, reporting, incentives, authorization rules, and procedural enforcement are removed, the keyed port plate, depth tubes, fixed-volume chambers, common mixing vessel, hydrometer, thermometer, and sight gauge still withdraw a physically depth-distributed composite and directly produce density, temperature, and level readings. Those material and metrological operations create the essential independent measurement. Human authorization remains necessary for safe deployment but is not the mechanism producing representativeness.","forbidden_channel_audit":"No algorithm selects samples during operation, no model infers stratification, no dashboard or report causes the measurement, and no incentive or compliance rule is presented as the intervention. The frontier comparison is a bounded design-stage test using directly observed physical outcomes; the deployed causal core is the mechanically embodied sampling geometry and analog measurement train. Optional calculation or recordkeeping can translate readings into an accounting entry, but removing it does not remove the independent composite measurement."}}}