.. _auto_curves_failurepoint_ymax:

*COMPUTE THE TIME AT WHICH THE Y REACHES A GIVEN VALUE FOR A SUSTAINED PERIOD*
==============================================================================

Scans one or more time-history curves and identifies the first x-axis (time) value at which the y-value exceeds a specified threshold and remains above it for a minimum sustained window. Use this worker to detect failure onset, trigger points, or threshold-crossing events in simulation or test signals.

When to use
-----------

Classification: **process**.

Tagged: ``curves``, ``failure_detection``, ``failure_point``, ``sustained_window``, ``threshold``, ``time_history``, ``ymax``.

Inputs
------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20 20 20

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curves From Which The Failure Point Is To Be Extracted
     - curvesfromwhichthefailurepointistobeextracted
     - vector
     - —
     - 
     - One or more time-history curves (x = time, y = response quantity) to analyse; accepts multiple curve objects in d3VIEW curve format.
   * - Maximum Y-value
     - y-max
     - scalar
     - —
     - 
     - Scalar threshold: y-values strictly greater than this value that persist for at least the specified time window will be classified as a failure point (same units as the y-axis of the input curves).
   * - Time Window
     - timewindow
     - scalar
     - —
     - 
     - Minimum duration (in the same time units as the x-axis) for which the y-value must continuously exceed y-max before the crossing is recorded as a failure point.
   * - Return Type
     - return_type
     - string
     - count
     - 
     - Controls what coordinate is returned at the failure point: 'xval' returns the time of first sustained threshold crossing, 'yval' returns the corresponding y-value; defaults to 'count'.

Outputs
-------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - curves_failurepoint_ymax_output_1
     - curves_failurepoint_ymax_output_1
     - dataset
     - Dataset containing the extracted failure-point coordinate (x or y value, depending on return_type) for each input curve, with one row per curve.

Disciplines
-----------

- data.curve.transform
- data.signal_processing

Runnable example
----------------

A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: `/api/workflow/example?id=curves_failurepoint_ymax <https://www.d3view.com/api/workflow/example?id=curves_failurepoint_ymax>`_

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_failurepoint_ymax</code>. Schema hash: <code>5055e1772e32</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>