Initial ideas of having product level 'Planning Policy' for grouping and limiting where items can be planned from and how.

sale_planner/models/planning.py

@@ -0,0 +1,16 @@
+from odoo import api, fields, models
+
+
+class PlanningPolicy(models.Model):
+    _name = 'sale.order.planning.policy'
+
+    name = fields.Char(string='Name')
+    carrier_filter_id = fields.Many2one(
+        'ir.filters',
+        string='Delivery Carrier Filter',
+    )
+    warehouse_filter_id = fields.Many2one(
+        'ir.filters',
+        string='Warehouse Filter',
+    )
+    always_closest_warehouse = fields.Boolean(string='Always Plan Closest Warehouse')