Shrestha, HilsonCachel, KathleenALKHATHLAN, MALLAKRundensteiner, ElkeHarrison, LaneAigner, WolfgangAndrienko, NataliaWang, Bei2025-05-262025-05-2620251467-8659https://doi.org/10.1111/cgf.70132https://diglib.eg.org/handle/10.1111/cgf70132Decisions involving algorithmic rankings affect our lives in many ways, from product recommendations, receiving scholarships, to securing jobs. While tools have been developed for interactively constructing fair consensus rankings from a handful of rankings, addressing the more complex real-world scenario- where diverse opinions are represented by a larger collection of rankings- remains a challenge. In this paper, we address these challenges by reformulating the exploration of rankings as a dimension reduction problem in a system called FairSpace. FairSpace provides new views, including Fair Divergence View and Cluster Views, by juxtaposing fairness metrics of different local and alternative global consensus rankings to aid ranking analysis tasks.We illustrate the effectiveness of FairSpace through a series of use cases, demonstrating via interactive workflows that users are empowered to create local consensuses by grouping rankings similar in their fairness or utility properties, followed by hierarchically aggregating local consensuses into a global consensus through direct manipulation. We discuss how FairSpace opens the possibility for advances in dimension reduction visualization to benefit the research area of supporting fair decision-making in ranking based decision-making contexts. Code, datasets and demo video available at: osf.io/d7cwkAttribution 4.0 International LicenseCCS Concepts: Human-centered computing → Visualization systems and tools; Interactive systems and toolsHuman centered computing → Visualization systems and toolsInteractive systems and tools10.1111/cgf.7013212 pages