{"closest_prior_art":[{"name":"NASA requirements-baseline and change-control practice","overlap":"Uses a stakeholder-agreed concept of operations, baselined requirements, formal change authority, system-wide impact assessment, comparison with the consequence of rejection, and fiscal and technical resource budgets to control requirements creep.","remaining_difference":"It does not specifically recover the enabling functions of a successful predecessor footbridge's constraints, reserve a pedestrian-only launch tier, count bridge configuration and deployment burdens, or retain the predecessor kit as an operational fallback.","source_ids":["SRC2"]},{"name":"FHWA value-engineering function-analysis workshop","overlap":"Provides a multidisciplinary concept/design-stage review that gathers existing information, identifies required functions, addresses scope creep, evaluates alternatives, and protects safe and reliable delivery.","remaining_difference":"It is general value engineering rather than a successor-specific mission-envelope firewall with work classes, parked capability tiers, quantitative configuration burdens, and a parity-before-expansion gate.","source_ids":["SRC3"]},{"name":"Existing modular crisis-footbridge and rapid-build bridge systems","overlap":"Existing research and products already combine modular construction, transportability, rapid assembly, standardized connections, selectable spans or widths, pedestrian use, heavy-load options, testing, and emergency deployment.","remaining_difference":"These sources describe bridge designs and configuration flexibility, not a governance method that first preserves a bounded pedestrian operating contract by recovering the useful functions of predecessor limits and admitting broader missions only after readiness evidence.","source_ids":["SRC1","SRC4"]}],"contrastive_claim_falsifier":"The claim is falsified if shadow triage of the sampled requirements cannot produce reproducible admit-or-park decisions, or if applying the predecessor-function inventory and pedestrian-first gate does not reduce permitted configurations, load cases, connection or member families, transport packages, crew steps, and inspection judgments relative to ordinary requirements change control.","contrastive_claim_remaining":"Beyond ordinary requirements baselining, value engineering, structural verification, and modular-product configuration, explicitly recovering the launch-enabling functions of predecessor mission and configuration limits may keep a pedestrian successor deployable and inspectable while deferring coupled vehicle, geometry, utility, sensing, leveling, and automation ambitions.","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","gates":{"adequate_source_search":{"rationale":"The bounded search covered the proposal name and distinctive phrases, requirements-creep and historical Bailey terminology, current emergency-bridge products and practices, and combinations of modular-footbridge, staged-release, configuration, testing, transport, and inspection concepts. Exactly four retained sources from four publishers were opened; the exact proposal name and constraint-function phrase produced no close match.","source_ids":["SRC1","SRC2","SRC3","SRC4"],"status":"PASS"},"bounded_next_test":{"rationale":"A one-day, read-only review of at most 35 requirements can produce the four specified artifacts and compare ordinary change control with the proposed shadow gate without changing a bridge, approval, procurement, or deployment. NASA and FHWA guidance supply established change-impact and function-analysis comparators.","source_ids":["SRC2","SRC3"],"status":"PASS"},"distinct_testable_claim":{"rationale":"The residual claim is narrower than the adjacent practices: predecessor-limit functions should determine first-release admission and measurably reduce bridge-analysis and deployment burdens. Stable classification and burden-count differences provide observable falsifiers.","source_ids":["SRC1","SRC2","SRC3","SRC4"],"status":"PASS"},"no_obvious_safety_or_authority_stop":{"rationale":"The authorized step is document-only and leaves structural changes, load ratings, testing, inspections, and deployment authorization with the designated engineering and safety authorities. The sources reinforce that requirement changes need safety-impact review and that crisis-footbridge assumptions require standards-based design and load testing.","source_ids":["SRC1","SRC2"],"status":"PASS"},"supported_problem":{"rationale":"NASA directly documents requirements creep producing systems more complex and expensive than intended. Crisis-footbridge research shows transport, assembly, span, width, loading, standards, and testing are coupled design concerns, while a commercial modular bridge demonstrates how span, loading, lanes, pedestrian facilities, decks, launch methods, and transport options can accumulate in one family. No retained source independently documents the proposal's exact successor program or its full postponed-capability stockpile.","source_ids":["SRC1","SRC2","SRC4"],"status":"PASS"}},"prior_art_disposition":"ADJACENT_PRIOR_ART","problem_evidence":{"finding":"The general problem is visible: requirements growth can increase system complexity, and emergency modular bridges couple mission breadth to structural configurations, loading, transport, assembly, and verification. Evidence for the exact claimed predecessor-to-successor history is absent, so support is partial.","source_ids":["SRC1","SRC2","SRC4"],"status":"PARTLY_SUPPORTED"},"research_id":"eoa_inverse_innovation_exp13_light_screen_20260806","schema_version":1,"screen_id":"E13P156","screen_survival":true,"search_lanes":{"component_combination":{"no_result_note":"No source was found that combined predecessor-constraint function recovery, a pedestrian-first release, bridge-specific complexity caps, staged capability triggers, readiness review, and predecessor fallback as one method.","queries":["pedestrian-first staged release modular emergency bridge requirements management","modular emergency bridge successor requirements vehicle pedestrian rapid deployment configuration complexity","requirements change impact analysis configuration variants verification validation staged capability release official guide"],"source_ids":["SRC1","SRC2","SRC4"]},"direct_problem_and_intervention":{"no_result_note":"Exact searches for the proposal title and its distinctive constraint-function terminology returned no close implementation or named method; phrase absence is not treated as novelty evidence.","queries":["\"Mission-Envelope Firewall\" modular emergency footbridge successor","\"constraint-function inventory\" requirements creep engineering","systems engineering \"complexity budget\" requirements configurations"],"source_ids":["SRC2","SRC3"]},"products_practices_and_standards":{"no_result_note":null,"queries":["modular bridge product pedestrian vehicle multiple spans rapid deployment pinned connections first party","emergency modular bridge standard inspection deployment manual configurations","site:fhwa.dot.gov temporary bridge emergency modular bridge guidance inspection pedestrian"],"source_ids":["SRC1","SRC3","SRC4"]},"synonyms_and_historical_terms":{"no_result_note":"Historical Bailey/successor searching located modular configuration practices but not the proposed governance bundle.","queries":["Bailey bridge successor scope creep requirements modular bridge","temporary modular footbridge disaster response hand portable pinned connections pedestrian","systems engineering requirements creep staged capability release complexity budget successor system"],"source_ids":["SRC1","SRC2","SRC4"]}},"sources":[{"claims_supported":["A tested light modular pedestrian footbridge was proposed for crisis situations with rapid transport and assembly by a small crew.","Its modularity supported different terrain conditions, spans, and widths in response to crisis-service requirements.","The work ties design assumptions to pedestrian and wheelchair loading, standards, transport packaging, module connections, and load testing."],"publisher":"Szybkobieżne Pojazdy Gąsienicowe / Military Institute of Engineer Technology","source_id":"SRC1","source_type":"PRIMARY_RESEARCH","title":"Concept of a Modular Footbridge to Be Used in Crisis Situations","url":"https://www.researchgate.net/publication/312553271_CONCEPT_OF_A_MODULAR_FOOTBRIDGE_TO_BE_USED_IN_CRISIS_SITUATIONS"},{"claims_supported":["Requirements creep can make a system more expensive and complex than intended.","NASA recommends an agreed concept of operations, formal change channels and authority, whole-system impact assessment, comparison with non-approval consequences, and checking changes against fiscal and technical budgets.","Approved changes are controlled through baselines, traceability, configuration control, and safety-aware review."],"publisher":"NASA","source_id":"SRC2","source_type":"OFFICIAL_GUIDANCE","title":"6.2 Requirements Management","url":"https://www.nasa.gov/reference/6-2-requirements-management/"},{"claims_supported":["FHWA value engineering uses multidisciplinary concept/design-stage review to provide needed functions safely and reliably.","Its job plan includes investigation, function analysis, evaluation, development, approval, and closeout.","Scope creep, multiple stakeholders, staging, and complex geotechnical requirements are recognized reasons for review."],"publisher":"Federal Highway Administration","source_id":"SRC3","source_type":"OFFICIAL_GUIDANCE","title":"The Value Engineering Process and Job Plan","url":"https://www.fhwa.dot.gov/ve/veproc.cfm"},{"claims_supported":["A first-party modular bridge product uses standardized interchangeable components and pinned or bolted connections for rapid-build emergency bridging.","Its configuration space includes varying spans, multiple spans, heavy axle loads, several widths and lane counts, pedestrian walkways, deck options, launch methods, and standard-container transport.","The product shows that rapid deployment and broad mission or configuration flexibility already coexist in commercial modular bridging."],"publisher":"Mabey Bridge","source_id":"SRC4","source_type":"FIRST_PARTY_PRODUCT","title":"Mabey Universal Bridge","url":"https://www.mabeybridge.com/products/mabey-universal-bridge/"}],"world_novelty_boundary":"This bounded public-web screen found adjacent requirements-management, value-engineering, crisis-footbridge, and modular-bridge practices but no single close match for the full governance bundle. It cannot establish world novelty, patentability, freedom to operate, market size, expert acceptance, implementation feasibility, or realized safety or operational value."}