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The configured source value 7 is provenance only and must never be described as the number of platforms studied.","The finalrankingtable is the sole authority for rank, platform mentions, platform share, average rank, and best rank. Ignore any conflicting value embedded in a entity evidence bundle.","The Consensus Ranking table must contain exactly one row per finalrankingtable entity, in that order, using that exact entityname. Never split one ranked entity into two product, model, SKU, or product-line rows, and never add another ranking row for a brand already listed. Put recommended products or plans inside that entity's ranked section.","Platform mentions count only ranking-discovery mentions. Do not substitute the number of platforms that later completed a fit assessment.","Citation IDs inside each entity bundle are local to that entity. Consolidate sources by URL using the supplied source catalog.","The URLs were collected from platform responses and were not independently validated by either writer stage.","Each fitreviewurlorplaceholder is the final site-relative CMS path for that entity's review. Link the entity name to that exact path exactly once in its ranked prose section, outside tables and headings. Never replace it with a run ID, report ID, UUID, or local output path.","Use the exact entity-namespaced citation IDs from the source catalog (e.g. e1:); never transfer a citation between entities."],"methodology":{"fit_rating_contract":["strong","good","mixed","weak","uncertain"],"included_valid_platform_count":7,"maximum_finalists":10,"minimum_mentions":2,"name":"Aging in Place Index cross-platform AI consensus analysis","platforms_included":["anthropic","deepseek","google","grok","kimi","openai","perplexity"],"platforms_queried":["openai","anthropic","deepseek","grok","perplexity","kimi","google"],"stages":["ranking_discovery","fit_assessment","normalization","editorial_synthesis"],"version":"alias-table-1"},"provenance":{"generated_at":"2026-09-27 21:00:47.817497+00","research_date":"2026-09-27","source_snapshot_sha256":"626e37fbd908c2ffda937737540967631d61712ed3ec464aa9b977941ab619c9","verification_scope":"public_verification"},"ranking":{"candidates_evaluated":16,"qualified_finalists":6,"ranking_unit":"Stairlift model and manufacturer"},"schema_version":4,"summary":"Stannah 120 Straight Stairlift leads the September 2026 consensus ranking for Basement Access & Utility Stairs, followed by Bruno Elan and Handicare 1000 Outdoor. The current study includes 7 valid AI-platform responses and 6 qualifying entities. Compared with August 2026, the leader changed. The current list added Stannah 120 Straight Stairlift, Handicare 1000 Outdoor, Savaria Curved Stairlift Custom Install, and Harmar Pinnacle SL300 and removed Stannah 320, Harmar Pinnacle SL600, AmeriGlide, and Savaria K2. This is an immediately preceding-month comparison. Rank movement measures changes…","target_buyer":"Seniors who need safe access to laundry rooms, storage areas, workshops, or living spaces located below the main floor","topic":{"base_category":"Stairlifts","category_criteria":["Rail fit on steep stairs","low-ceiling clearance","damp-environment durability","obstruction sensors","seat belt comfort","battery backup","service access","installation price"],"geography":"United States","slug":"best-stairlifts-for-basement-stairs","title":"Best Stairlifts for Basement Stairs","use_case":"Basement Access & Utility Stairs"}}