diff --git a/purchase_order_product_recommendation_supermarket/__manifest__.py b/purchase_order_product_recommendation_supermarket/__manifest__.py
index 27a1a9b..880934c 100644
--- a/purchase_order_product_recommendation_supermarket/__manifest__.py
+++ b/purchase_order_product_recommendation_supermarket/__manifest__.py
@@ -13,7 +13,14 @@
         "security/ir.model.access.csv",
         "wizards/purchase_order_recommendation.xml",
         "views/product_template_view.xml",
+        "views/product_stock_out_period_menu.xml",
         "data/stock_out_cron.xml",
     ],
+    "assets": {
+        "web.assets_backend": [
+            "purchase_order_product_recommendation_supermarket/static/src/scss/sticky_recommendation.scss",
+            # "purchase_order_product_recommendation_supermarket/static/src/js/sticky_recommendation.js",
+        ],
+    },
     "demo": [],
 }
diff --git a/purchase_order_product_recommendation_supermarket/i18n/es.po b/purchase_order_product_recommendation_supermarket/i18n/es.po
index b05b268..7a1005f 100644
--- a/purchase_order_product_recommendation_supermarket/i18n/es.po
+++ b/purchase_order_product_recommendation_supermarket/i18n/es.po
@@ -165,6 +165,48 @@ msgstr ""
 "Cantidad de productos en stock + Cantidad de producto por venir (pedidos "
 "confirmados)"
 
+#. module: purchase_order_product_recommendation_supermarket
+#: model_terms:ir.ui.view,arch_db:purchase_order_product_recommendation_supermarket.view_product_stock_out_period_form
+msgid "Stock-out Period"
+msgstr "Periodo sin stock"
+
+#. module: purchase_order_product_recommendation_supermarket
+#: model_terms:ir.ui.view,arch_db:purchase_order_product_recommendation_supermarket.view_product_stock_out_period_tree
+#: model:ir.actions.act_window,name:purchase_order_product_recommendation_supermarket.action_product_stock_out_period
+#: model:ir.ui.menu,name:purchase_order_product_recommendation_supermarket.menu_product_stock_out_period
+msgid "Stock-out Periods"
+msgstr "Periodos sin stock"
+
+#. module: purchase_order_product_recommendation_supermarket
+#: model_terms:ir.ui.view,arch_db:purchase_order_product_recommendation_supermarket.view_product_stock_out_period_search
+msgid "Open"
+msgstr "Abierto"
+
+#. module: purchase_order_product_recommendation_supermarket
+#: model_terms:ir.ui.view,arch_db:purchase_order_product_recommendation_supermarket.view_product_stock_out_period_search
+msgid "Closed"
+msgstr "Cerrado"
+
+#. module: purchase_order_product_recommendation_supermarket
+#: model_terms:ir.ui.view,arch_db:purchase_order_product_recommendation_supermarket.view_product_stock_out_period_search
+msgid "Search Stock-out Periods"
+msgstr "Buscar periodos sin stock"
+
+#. module: purchase_order_product_recommendation_supermarket
+#: model_terms:ir.ui.view,arch_db:purchase_order_product_recommendation_supermarket.view_product_stock_out_period_search
+msgid "Open State"
+msgstr "Estado (abierto)"
+
+#. module: purchase_order_product_recommendation_supermarket
+#: model_terms:ir.ui.view,arch_db:purchase_order_product_recommendation_supermarket.view_product_stock_out_period_search
+msgid "Product"
+msgstr "Producto"
+
+#. module: purchase_order_product_recommendation_supermarket
+#: model:ir.actions.act_window,help:purchase_order_product_recommendation_supermarket.action_product_stock_out_period
+msgid "List of computed periods where a product template had zero stock. Open periods are still ongoing."
+msgstr "Listado de periodos calculados en los que una plantilla de producto estuvo sin stock. Los periodos abiertos siguen en curso."
+
 #. module: purchase_order_product_recommendation_supermarket
 #: model:ir.model.fields,help:purchase_order_product_recommendation_supermarket.field_purchase_order_recommendation__ignore_zero_stock_days
 msgid ""
diff --git a/purchase_order_product_recommendation_supermarket/i18n/purchase_order_product_recommendation_supermarket.pot b/purchase_order_product_recommendation_supermarket/i18n/purchase_order_product_recommendation_supermarket.pot
index c2dd1d3..ed2134e 100644
--- a/purchase_order_product_recommendation_supermarket/i18n/purchase_order_product_recommendation_supermarket.pot
+++ b/purchase_order_product_recommendation_supermarket/i18n/purchase_order_product_recommendation_supermarket.pot
@@ -468,3 +468,40 @@ msgstr ""
 #: model:ir.model.fields,field_description:purchase_order_product_recommendation_supermarket.field_purchase_order_recommendation_line__units_virtual_available
 msgid "Units Virtual Available"
 msgstr ""
+
+#. module: purchase_order_product_recommendation_supermarket
+#: model_terms:ir.ui.view,arch_db:purchase_order_product_recommendation_supermarket.view_product_stock_out_period_form
+msgid "Stock-out Period"
+msgstr ""
+
+#. module: purchase_order_product_recommendation_supermarket
+#: model_terms:ir.ui.view,arch_db:purchase_order_product_recommendation_supermarket.view_product_stock_out_period_tree
+#: model:ir.actions.act_window,name:purchase_order_product_recommendation_supermarket.action_product_stock_out_period
+#: model:ir.ui.menu,name:purchase_order_product_recommendation_supermarket.menu_product_stock_out_period
+msgid "Stock-out Periods"
+msgstr ""
+
+#. module: purchase_order_product_recommendation_supermarket
+#: model_terms:ir.ui.view,arch_db:purchase_order_product_recommendation_supermarket.view_product_stock_out_period_search
+msgid "Open"
+msgstr ""
+
+#. module: purchase_order_product_recommendation_supermarket
+#: model_terms:ir.ui.view,arch_db:purchase_order_product_recommendation_supermarket.view_product_stock_out_period_search
+msgid "Closed"
+msgstr ""
+
+#. module: purchase_order_product_recommendation_supermarket
+#: model_terms:ir.ui.view,arch_db:purchase_order_product_recommendation_supermarket.view_product_stock_out_period_search
+msgid "Search Stock-out Periods"
+msgstr ""
+
+#. module: purchase_order_product_recommendation_supermarket
+#: model_terms:ir.ui.view,arch_db:purchase_order_product_recommendation_supermarket.view_product_stock_out_period_search
+msgid "Open State"
+msgstr ""
+
+#. module: purchase_order_product_recommendation_supermarket
+#: model:ir.actions.act_window,help:purchase_order_product_recommendation_supermarket.action_product_stock_out_period
+msgid "List of computed periods where a product template had zero stock. Open periods are still ongoing."
+msgstr ""
diff --git a/purchase_order_product_recommendation_supermarket/static/src/scss/sticky_recommendation.scss b/purchase_order_product_recommendation_supermarket/static/src/scss/sticky_recommendation.scss
new file mode 100644
index 0000000..3a87f8d
--- /dev/null
+++ b/purchase_order_product_recommendation_supermarket/static/src/scss/sticky_recommendation.scss
@@ -0,0 +1,104 @@
+/* Sticky header for purchase recommendation lines tree view */
+/* Make the tree container scrollable so position:sticky works inside */
+.o_purchase_recommendation_tree.o_list_view, /* defensive if Odoo adds class */
+.o_purchase_recommendation_tree { 
+  max-height: 85vh; /* adjustable */
+  overflow-y: auto;
+  position: relative;
+}
+
+/* Target Odoo list table header cells */
+.o_purchase_recommendation_tree table thead th,
+.o_purchase_recommendation_tree .o_list_table thead th,
+.o_purchase_recommendation_tree table thead th > div,
+.o_purchase_recommendation_tree .o_list_table thead th > div {
+  position: sticky !important;
+  top: 0 !important;
+  z-index: 7 !important; /* above possible indicators */
+  background: var(--o-view-background-color, #f8f9fa) !important;
+  line-height: 1.2rem;
+  box-sizing: border-box;
+}
+
+/* Extra background for nested inner elements */
+.o_purchase_recommendation_tree table thead th > div { 
+  background: inherit;
+}
+
+/* Subtle bottom border / shadow */
+.o_purchase_recommendation_tree table thead th::after {
+  content: '';
+  position: absolute;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  height: 1px;
+  background: rgba(0,0,0,0.15);
+  pointer-events: none;
+}
+
+/* Prevent collapse issues that sometimes break sticky in Firefox */
+.o_purchase_recommendation_tree table { 
+  border-collapse: separate !important;
+  border-spacing: 0;
+  width: 100%;
+}
+
+/* Row separators (avoid double borders) */
+.o_purchase_recommendation_tree table tbody tr { 
+  border-bottom: 1px solid #8f8d8d;
+}
+// .o_purchase_recommendation_tree table tbody tr:last-child { 
+//   border-bottom: 0;
+// }
+// /* Remove previous cell-level borders */
+// .o_purchase_recommendation_tree table td, 
+// .o_purchase_recommendation_tree table th { 
+//   border-bottom: none;
+// }
+
+/* Zebra striping: only apply to rows without state-driven bg (avoid overriding decoration-* classes) */
+.o_purchase_recommendation_tree table tbody tr:nth-child(odd):not([class*='o_data_row_selected']):not(.o_list_view_group_header) td {
+  background-color: #ebe6e6;
+  border-bottom: 1px solid #8f8d8d;
+}
+.o_purchase_recommendation_tree table tbody tr:nth-child(even):not([class*='o_data_row_selected']):not(.o_list_view_group_header) td {
+  background-color: #ffffff;
+  border-bottom: 1px solid #8f8d8d;
+}
+
+/* Keep Odoo decoration colors dominant (info/success/danger/muted) */
+.o_purchase_recommendation_tree table tbody tr[decoration-info] td,
+.o_purchase_recommendation_tree table tbody tr[decoration-success] td,
+.o_purchase_recommendation_tree table tbody tr[decoration-danger] td,
+.o_purchase_recommendation_tree table tbody tr[decoration-muted] td {
+  background-color: inherit;
+}
+
+/* Hover highlight (soft) */
+.o_purchase_recommendation_tree table tbody tr:hover td { 
+  background-color: #eef6ff;
+}
+.o_purchase_recommendation_tree table tbody tr.o_data_row_selected td { 
+  background-color: #d9ecff !important;
+}
+
+/* Stronger text color for better contrast over zebra backgrounds */
+/* Force stronger text color (override potential nested span styles) */
+.o_purchase_recommendation_tree table tbody tr td,
+.o_purchase_recommendation_tree table tbody tr td span,
+.o_purchase_recommendation_tree table tbody tr td div {
+  color: #1b1b1b !important;
+}
+
+/* Optional: indicate scroll with gradient at top when not at start */
+.o_purchase_recommendation_tree.is-scrolled::before { 
+  content: '';
+  position: sticky;
+  top: 0;
+  height: 0.35rem;
+  display: block;
+  background: linear-gradient(var(--o-view-background-color, #f8f9fa), rgba(248,249,250,0));
+  z-index: 6;
+  pointer-events: none;
+}
diff --git a/purchase_order_product_recommendation_supermarket/views/product_stock_out_period_menu.xml b/purchase_order_product_recommendation_supermarket/views/product_stock_out_period_menu.xml
new file mode 100644
index 0000000..8a45cb6
--- /dev/null
+++ b/purchase_order_product_recommendation_supermarket/views/product_stock_out_period_menu.xml
@@ -0,0 +1,68 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <!-- Tree view: order by start_date desc -->
+    <record id="view_product_stock_out_period_tree" model="ir.ui.view">
+        <field name="name">product.stock.out.period.tree</field>
+        <field name="model">product.stock.out.period</field>
+        <field name="arch" type="xml">
+            <tree string="Stock-out Periods" default_order="start_date desc" create="0" edit="0">
+                <field name="product_tmpl_id"/>
+                <field name="start_date"/>
+                <field name="end_date"/>
+                <field name="days_out"/>
+                <field name="is_open"/>
+            </tree>
+        </field>
+    </record>
+
+    <!-- Form view (read-only) -->
+    <record id="view_product_stock_out_period_form" model="ir.ui.view">
+        <field name="name">product.stock.out.period.form</field>
+        <field name="model">product.stock.out.period</field>
+        <field name="arch" type="xml">
+            <form string="Stock-out Period" create="0" edit="0">
+                <group>
+                    <field name="product_tmpl_id"/>
+                    <field name="is_open"/>
+                </group>
+                <group>
+                    <field name="start_date"/>
+                    <field name="end_date"/>
+                    <field name="days_out"/>
+                </group>
+            </form>
+        </field>
+    </record>
+
+    <!-- Search view with default filter open -->
+    <record id="view_product_stock_out_period_search" model="ir.ui.view">
+        <field name="name">product.stock.out.period.search</field>
+        <field name="model">product.stock.out.period</field>
+        <field name="arch" type="xml">
+            <search string="Search Stock-out Periods">
+                <field name="product_tmpl_id"/>
+                <filter name="filter_open" string="Open" domain="[('is_open','=',True)]" help="Show only currently open stock-out periods"/>
+                <filter name="filter_closed" string="Closed" domain="[('is_open','=',False)]" help="Show closed stock-out periods"/>
+                <group expand="0" string="Group By">
+                    <filter name="group_product" string="Product" context="{'group_by':'product_tmpl_id'}"/>
+                    <filter name="group_open" string="Open State" context="{'group_by':'is_open'}"/>
+                </group>
+            </search>
+        </field>
+    </record>
+
+    <!-- Action -->
+    <record id="action_product_stock_out_period" model="ir.actions.act_window">
+        <field name="name">Stock-out Periods</field>
+        <field name="res_model">product.stock.out.period</field>
+        <field name="view_mode">tree,form</field>
+        <field name="search_view_id" ref="purchase_order_product_recommendation_supermarket.view_product_stock_out_period_search"/>
+        <field name="context">{"search_default_filter_open": 1}</field>
+        <field name="help" type="html">
+            <p>List of computed periods where a product template had zero stock. Open periods are still ongoing.</p>
+        </field>
+    </record>
+
+    <!-- Menu under Inventory -> Reporting -->
+    <menuitem id="menu_product_stock_out_period" name="Stock-out Periods" parent="stock.menu_warehouse_report" action="purchase_order_product_recommendation_supermarket.action_product_stock_out_period" sequence="50"/>
+</odoo>
\ No newline at end of file
diff --git a/purchase_order_product_recommendation_supermarket/wizards/purchase_order_recommendation.xml b/purchase_order_product_recommendation_supermarket/wizards/purchase_order_recommendation.xml
index f62749b..26089f4 100644
--- a/purchase_order_product_recommendation_supermarket/wizards/purchase_order_recommendation.xml
+++ b/purchase_order_product_recommendation_supermarket/wizards/purchase_order_recommendation.xml
@@ -15,6 +15,9 @@
                         context="{'no_return_action': True}"/>
                 </header>
             </xpath>
+            <xpath expr="//field[@name='line_ids']/tree" position="attributes">
+                <attribute name="class">o_purchase_recommendation_tree</attribute>
+            </xpath>
 
             <field name="line_amount" position="replace">
                 <field name="order_days" widget="numeric_step" />