.. _auto_curve_failurepoint_ymax:

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

Scans a curve and finds the first time the y-value exceeds a specified threshold for a sustained duration (time window), returning either the x-value or y-value at that failure point. Use this worker to detect onset of failure or exceedance events in time-history signals.

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

Classification: **process**.

Tagged: ``curve_analysis``, ``failure_point``, ``sustained_exceedance``, ``threshold``, ``time_history``, ``ymax``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve From Which The Failure Point Is To Be Extracted
     - curvefromwhichthefailurepointistobeextracted
     - vector
     - —
     - 
     - The input time-history curve (x = time, y = signal value) to be scanned for a sustained exceedance event; supply as a two-column vector.
   * - Maximum Y-value
     - y-max
     - scalar
     - —
     - 
     - The y-value threshold (in the same units as the curve's y-axis); the curve must exceed this value continuously for at least the specified time window to register a failure point.
   * - Time Window
     - timewindow
     - scalar
     - —
     - 
     - Minimum duration (in the same time units as the curve's x-axis) for which the y-value must remain above the threshold before the point is classified as a failure onset.
   * - Return Type
     - return_type
     - string
     - count
     - 
     - Controls what value is returned at the detected failure point: 'xval' returns the time (x-axis value) of onset, 'yval' returns the corresponding signal magnitude; defaults to 'count'.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_failurepoint_ymax_output_1
     - curve_failurepoint_ymax_output_1
     - scalar
     - Scalar result at the detected failure point — either the x-axis time of onset or the y-axis signal value, depending on the selected Return Type.

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=curve_failurepoint_ymax <https://www.d3view.com/api/workflow/example?id=curve_failurepoint_ymax>`_

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_failurepoint_ymax</code>. Schema hash: <code>9598cf02772b</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
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