{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp12_substrate_denial72_20260805","research_id":"eoa_inverse_innovation_exp12_light_screen_20260805","cell_id":"modular_decomposition__computer_science","search_lanes":{"direct_problem_and_intervention":{"queries":["modular fiber optic harness removable segments passive test ports fault isolation multi-fiber interconnect","fiber optic harness sectionalizing fault localization optical test access point passive reflector"],"source_ids":["SRC1","SRC2"],"no_result_note":null},"synonyms_and_historical_terms":{"queries":["fiber optic cable span removable module passive reflector fault location demarcation point","fiber Bragg grating marker connector boundary fault localization removable optical cable segment"],"source_ids":["SRC1","SRC3"],"no_result_note":null},"products_practices_and_standards":{"queries":["MPO cassette modular fiber enclosure test port data center optical interconnect first party","fiber monitoring cassette passive optical tap test port patch panel product"],"source_ids":["SRC2","SRC4"],"no_result_note":null},"component_combination":{"queries":["modular fiber harness replaceable cable segment fault isolation connector test point","optical link segment replaceable cassette passive test access fault localization patent"],"source_ids":["SRC1","SRC2","SRC3","SRC4"],"no_result_note":"No retained source disclosed the exact integrated combination of responsibility-defined removable routing spans and passive integrity landmarks whose indicated interval is itself the replacement unit."}},"sources":[{"source_id":"SRC1","title":"The FOA Reference For Fiber Optics — Link Testing","publisher":"The Fiber Optic Association, Inc.","url":"https://www.foa.org/tech/ref/testing/test/linktest.html","source_type":"TRADE_PROFESSIONAL","claims_supported":["Low received power may require measurements at every connection or patch panel to isolate a bad cable or connector.","High end-to-end loss can arise from connectors, patch-panel splices, tight bends, or broken fibers.","Segment-by-segment testing with a source and power meter and OTDR troubleshooting are established practices.","Additional connections require careful handling, cleaning, bend control, and loss-budget management."]},{"source_id":"SRC2","title":"Vertiv Structure Cabling Connection-MPO Modular Cassette Series","publisher":"Vertiv","url":"https://www.vertiv.com/en-us/products-catalog/facilities-enclosures-and-racks/cabling/vertiv-structure-cabling-connection-mpo-modular-cassette-series/","source_type":"FIRST_PARTY_PRODUCT","claims_supported":["High-density preconnectorized MPO/MTP systems with backbone cables, module boxes, patch panels, and patch cords are sold for data centers.","Field-pluggable modular components and factory testing are established.","The vendor associates modularity with rapid connection, faster recovery from failures, and reduced movement risk during changes."]},{"source_id":"SRC3","title":"Fault identification and localization for Ethernet Passive Optical Network using L-band ASE source and various types of fiber Bragg grating","publisher":"Optical Fiber Technology / Elsevier","url":"https://www.sciencedirect.com/science/article/abs/pii/S1068520017304686","source_type":"PRIMARY_RESEARCH","claims_supported":["Passive fiber Bragg gratings with distinguishable reflection spectra have been inserted into distribution fibers as optical identifiers.","Experimental monitoring used reflected spectra to identify and localize faulty PON branches.","The reported system used an ASE source and optical spectrum analyzer rather than simple per-boundary power readings."]},{"source_id":"SRC4","title":"OPT-X HDX BiDi MTP TAP Cassettes","publisher":"Leviton","url":"https://leviton.com/products/unhdx-btc","source_type":"FIRST_PARTY_PRODUCT","claims_supported":["Commercial MTP cassettes integrate passive optical traffic-analysis points into structured cabling.","The cassettes support dense monitoring, multiple connector formats, and passive split ratios.","Integrating passive monitoring into a cassette is established, although the stated purpose is observing live traffic rather than locating a replaceable damaged routing span."]}],"problem_evidence":{"status":"PARTLY_SUPPORTED","finding":"The general diagnostic mismatch is visible: professional guidance says low-power faults may require testing at every connection or testing each segment, while listing connectors, bends, and broken fibers as competing causes. Commercial data-center products also claim modular fiber systems reduce movement risk and accelerate recovery. The narrower assertion that dense compute-board harnesses are commonly monolithic, physically entangled, and replaced wholesale was not directly established by the retained sources.","source_ids":["SRC1","SRC2"]},"closest_prior_art":[{"name":"Successive patch-panel measurements and segment-by-segment link testing","source_ids":["SRC1"],"overlap":"Uses a source and power meter at successive physical boundaries to isolate the cable segment or connector responsible for excessive loss.","remaining_difference":"It presumes accessible connections and separately testable links; it does not specify responsibility-defined removable cassettes or non-disruptive passive landmarks coextensive with replacement units."},{"name":"Vertiv preterminated MPO/MTP modular data-center cabling","source_ids":["SRC2"],"overlap":"Provides high-density, field-pluggable modular components intended to reduce disturbance and enable rapid recovery.","remaining_difference":"The disclosed product description does not provide calibrated passive reflection landmarks or test ports for identifying which routing-region cassette contains a fault."},{"name":"Leviton HDX passive TAP cassette","source_ids":["SRC4"],"overlap":"Combines a dense removable optical cassette with an integrated passive monitoring interface.","remaining_difference":"The TAP exposes duplicated live traffic for monitoring; it is not described as marking consecutive span boundaries, localizing attenuation to a cassette, or making the monitored interval the cable-span replacement unit."},{"name":"FBG-identified passive optical-network branches","source_ids":["SRC3"],"overlap":"Uses passive calibrated reflection features as optical identifiers so failures can be assigned to bounded fibers or branches.","remaining_difference":"The identifiers are not aligned with removable routing-region cassettes, and the demonstrated method requires spectral instrumentation in a point-to-multipoint access network."}],"prior_art_disposition":"ADJACENT_PRIOR_ART","contrastive_claim_remaining":"For a short, dense multi-fiber compute interconnect, passive readings placed at keyed boundaries of responsibility-defined removable routing cassettes can identify the cassette containing a seeded loss or discontinuity, with fewer unaffected spans opened than endpoint testing, while preserving channel mapping and remaining within a predefined insertion-loss and stability budget. The retained art separately establishes segment testing, modular MPO systems, passive TAP cassettes, and reflection identifiers, but not this exact alignment of measured interval and physical replacement unit.","contrastive_claim_falsifier":"In blinded bench trials, the claim is falsified if boundary readings do not identify the seeded-fault cassette more reliably or with fewer unaffected openings than endpoint testing; if ordinary OTDR testing already maps faults just as directly to the same service units; or if added loss, reflections, contamination, mapping errors, or reconnection instability exceed the predefined acceptance limits.","gates":{"adequate_source_search":{"status":"PASS","rationale":"The bounded search covered direct descriptions, historical and synonymous fault-localization terminology, commercial modular/TAP products, professional testing practice, passive reflection research, and combinations of these components. Four opened sources span four publishers and include primary research and first-party product evidence.","source_ids":["SRC1","SRC2","SRC3","SRC4"]},"supported_problem":{"status":"PASS","rationale":"The broader problem is partly supported: established guidance confirms that endpoint loss can require connection-by-connection or segment-by-segment isolation and that connectors, bends, and breaks are competing causes. The specific prevalence and severity in dense compute-board harnesses remain unverified.","source_ids":["SRC1","SRC2"]},"distinct_testable_claim":{"status":"PASS","rationale":"A measurable distinction remains: whether coextensive passive measurement intervals and removable routing cassettes outperform endpoint testing in correct span identification and unnecessary-span disturbance while meeting loss and mapping constraints.","source_ids":["SRC1","SRC2","SRC3","SRC4"]},"bounded_next_test":{"status":"PASS","rationale":"A four-span, four-channel prototype versus a continuous control, with blinded contamination, bend-loss, and discontinuity faults, is finite and directly measures localization accuracy, spans opened, insertion loss, reflections, mapping errors, and boundary-caused failures.","source_ids":["SRC1","SRC2","SRC3","SRC4"]},"no_obvious_safety_or_authority_stop":{"status":"PASS","rationale":"The proposed first test is confined to spare bench fibers, low-power approved sources, and non-production ports under laboratory authority, with explicit stop and rollback conditions. Connector cleanliness, handling, bend limits, and optical-loss margins require controls but do not create an obvious stop.","source_ids":["SRC1"]}},"screen_survival":true,"world_novelty_boundary":"This coarse public-web screen found adjacent prior art for every major component and cannot establish world novelty or non-obviousness. It does not establish patentability, freedom to operate, prevalence, market size, expert acceptance, production qualification, effect magnitude, or realized value; patent and standards searches and domain-expert review would be required for stronger conclusions."}