[ADD] MRP: Delayed production filter

closes #14670

Signed-off-by: Jessica Rogers (jero) <[email protected]>

Author: jero-odoo

content/applications/inventory_and_mrp/manufacturing/reporting.rst

@@ -5,6 +5,7 @@ Reporting
 .. toctree::
    :titlesonly:
 
+   reporting/delayed
    reporting/allocation
    reporting/oee
    reporting/production_analysis

content/applications/inventory_and_mrp/manufacturing/reporting/delayed.rst

@@ -0,0 +1,65 @@
+======
+Delays
+======
+
+.. |SO| replace:: :abbr:`SO (sales order)`
+.. |SOs| replace:: :abbr:`SOs (sales orders)`
+.. |MO| replace:: :abbr:`MO (manufacturing order)`
+.. |MOs| replace:: :abbr:`MOs (manufacturing orders)`
+.. |RfQ| replace:: :abbr:`RfQ (request for quotation)`
+
+Odoo's *Manufacturing* app displays *delays* in manufacturing orders through the :guilabel:`Delayed
+Productions` filter. If the |MO|'s end date exceeds its deadline, the deadline is highlighted in red
+to draw attention to the delay.
+
+.. image:: delayed/delayed-filter.png
+   :alt: The delayed production filter in Odoo.
+
+Deadline calculation
+====================
+
+The |MO| deadline depends on how the |MO| was created, and is calculated as follows:
+
+- **Make To Order**: the |MO| deadline is the *Sales Order Delivery Date*.
+- **Replenishment**: the |MO| deadline is *today + Manufacturing Lead Time*.
+- **Manually created MO**: the deadline field remains empty.
+
+.. important::
+   The |MO| *deadline* is not the same as the |MO| *end date*.
+
+   The end date is computed as:
+
+   .. math::
+      \text{End date} =
+       \text{Scheduled start date}
+       +\text{Total duration of all operations}
+
+Filters
+=======
+
+Several additional filters are available to help track delays:
+
+- :guilabel:`Delayed Productions`: the |MO|'s *scheduled start date* is later than the deadline.
+- :guilabel:`Late`: the |MO|'s *scheduled end date* exceeds the deadline, highlighted in red.
+- :guilabel:`Late Availability`: one or more required components are not available before the
+  deadline. For example, a confirmed purchase order or manufacturing order for components is
+  scheduled to end *after* the |MO| deadline.
+- :guilabel:`Components Available`: all components are available to begin production.
+
+Use case
+========
+
+Consider an |MO| with a deadline of **September 17th**:
+
+- If production on the |MO| starts after September 17th, it appears in the :guilabel:`Delayed
+  Productions` filter.
+- If required components are scheduled to arrive after September 17th, the |MO| appears in the
+  :guilabel:`Late Availability` filter.
+- If the |MO| has a scheduled end date after September 17th, it appears in the :guilabel:`Late`
+  filter.
+
+.. image:: delayed/deadline.png
+   :alt: An MO with the deadline emphasized.
+
+By combining these indicators, planners can quickly identify where production is at risk of missing
+delivery commitments.