Primary Events Table
===========================

The Primary Events page allows to display a table with all the primary events of a selected system.

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To go to the Primary Events page, click on the ``Primary Events`` tab on the navigation bar.

.. image:: img/primary/primary_page.PNG
    :width: 696.47pt

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By clicking on the ``Existing Projects`` dropdown, all the available systems will be shown. Click on one system to load a dropdown with the system's fault trees.

.. image:: img/primary/select_sys.PNG
    :width: 696.47pt

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Click on ``Show all basics events`` to load all the primary events of the system. Click on one fault tree to load only the primary events of the selected fault tree.

.. image:: img/primary/select_tg.PNG
    :width: 696.47pt

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The Primary Event table is shown in the picture below.

.. image:: img/primary/table.PNG
    :width: 696.47pt

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With the radio button ``Ungrouped`` and ``Grouped BE``, it is possible to group nodes that share same id code. 

.. image:: img/primary/ungroup_group_be.png
    :width: 696.47pt

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When user clicks on ``Import/Update BE`` button, a modal will appear as the picture below. Import and update primary events can be done through an excel file.

.. image:: img/primary/import_primary_events_modal.png
    :width: 696.47pt

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The table displays the following columns:

- **Row. Num.:** The number of the row. This column contains the `Edit` button which enables the change of different parameters of the selected event.

- **ID:** Shows the primary event ID.

- **Description:** Shows the primary event description.

- **Q:** Shows the primary event Unavailability.

- **Calculation Model:** Shows the type of calculation model used in the event (Constant probability, Failure Rate or MTBF).

- **Dormancy (h):** Shows the dormancy (dormant events) or the life time (hidden events) in hours. The value will be shown only if the event is dormant or hidden, otherwise "`---`" will be shown.

- **FR/MTBF:** Shows the FR/MTBF only if the event is not has not a constant probability.

- **Repeats:** Shows the number of repetitions of an event within the same fault tree.

- **Top Event:** Shows the primary event's top event ID. It is useful when displaying the basic events of all the different fault trees.

- **Primary Event:** Shows the type of primary event, Basic or Undeveloped.

- **Notes:** Shows the notes written by the user. This field only can be seen in this page.

- **Source FR:** Shows the source of failure rate written by the user.

Edit a Primary Event
----------------------

To edit a primary event, click on the `Edit` icon. The row will change as shown in the picture below.

.. image:: img/primary/edit.PNG
    :width: 696.47pt

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In this page, the user can change the ID, the description the calculation model, set the event as dormant or hidden, add a note...

The changes will be correctly propagated in all the nodes of the system.