.. _auto_curve_failurepoint_yrange:

*COMPUTE THE FAILURE BY CHECKING FOR A Y-VALUE BETWEEN TWO RANGES OVER A GIVEN DURATION*
========================================================================================

Scans a curve for the first point where the y-value falls within a specified [y-min, y-max] range and remains there for a minimum time window, flagging that point as a failure. Use this worker to detect sustained threshold exceedances in time-history signals such as force, displacement, or voltage curves.

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

Classification: **process**.

Tagged: ``curve_analysis``, ``failure_point``, ``sustained_exceedance``, ``threshold``, ``time_window``, ``y_range``.

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 or pseudo-time, y = signal of interest) to be scanned for the failure condition; accepts any numeric curve vector.
   * - Minimum Y-value
     - y-min
     - scalar
     - —
     - 
     - Lower bound of the y-value range (inclusive) that defines the failure band; any y-value strictly below this threshold does not contribute to a failure event.
   * - Maximum Y-value
     - y-max
     - scalar
     - —
     - 
     - Upper bound of the y-value range (inclusive) that defines the failure band; any y-value strictly above this threshold does not contribute to a failure event.
   * - Time Window
     - timewindow
     - scalar
     - —
     - 
     - Minimum continuous duration (in the same time units as the curve x-axis) over which the y-value must remain within [y-min, y-max] before the condition is classified as a failure point.
   * - Return Type
     - return_type
     - string
     - count
     - 
     - Controls what value is returned at the detected failure point: 'xval' returns the x-coordinate (time) of the failure onset, 'yval' returns the corresponding y-coordinate; defaults to 'count'.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_failurepoint_yrange_output_1
     - curve_failurepoint_yrange_output_1
     - scalar
     - Scalar result at the detected failure point: the x-value (time of onset) or y-value of the curve at that point, depending on the selected return_type; returns null/empty if no failure condition is found.

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

- data.curve.transform
- data.signal_processing
- engineering.material.failure

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

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

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_failurepoint_yrange</code>. Schema hash: <code>73acef50a637</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>