> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ionworks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# 2025 11 10

<Update label="November 10, 2025" description="Simpler data API, faster large-result loading, and Sobol sensitivity analysis">
  ## Simpler data API

  The data handling API has been simplified with improved validation, making it easier to upload and work with experimental data. Custom fields are now supported via an additional data column, so you can attach arbitrary metadata to your measurements.

  [Find out more →](/data/uploading)

  ## Faster loading for large results

  Large results (such as simulation solutions and pipeline results) now load faster, with improved page load times and reduced memory pressure when working with large datasets.

  ## Sobol sensitivity analysis

  The pipeline now supports Sobol-based sensitivity analysis, enabling global sensitivity studies that quantify how each parameter contributes to output variance — including second-order interaction effects.

  <AccordionGroup>
    <Accordion title="Studio">
      **Improvements**

      * Pipeline elements now use a more memory-efficient internal representation, reducing memory usage.
      * Optimization v2 refactored for a more consistent workflow.

      **Fixes**

      * Fixed a bug where initial conditions that violate events caused errors.
      * Fixed user permissions at the organization level.
      * Fixed a frontend race condition when navigating between projects.
    </Accordion>

    <Accordion title="Pipeline">
      **Improvements**

      * ECM and lumped models are now compatible with the pipeline.
      * Interpolant numerical stability improved using smooth-step functions.
      * Optimiser architecture refactored for improved performance and scalability.

      **Fixes**

      * Fixed entry/create serialization issues.
      * Fixed experiment parsing.
      * Fixed a bug with non-parametric inputs to the MSMR objective.
      * Improved interpolant error messages and numerical stability.
    </Accordion>
  </AccordionGroup>
</Update>