diff --git a/mrp_multi_level/models/product_mrp_area.py b/mrp_multi_level/models/product_mrp_area.py
index 635a9699c..ff6d153e0 100644
--- a/mrp_multi_level/models/product_mrp_area.py
+++ b/mrp_multi_level/models/product_mrp_area.py
@@ -6,7 +6,8 @@
 
 from math import ceil
 
-from odoo import api, fields, models
+from odoo import api, fields, models, _
+from odoo.exceptions import ValidationError
 
 
 class ProductMRPArea(models.Model):
@@ -98,11 +99,30 @@ class ProductMRPArea(models.Model):
         inverse_name="product_mrp_area_id",
         readonly=True,
     )
+    group_estimate_days = fields.Integer(
+        string="Group Days of Estimates",
+        default=1,
+    )
     _sql_constraints = [
         ('product_mrp_area_uniq', 'unique(product_id, mrp_area_id)',
          'The product/MRP Area parameters combination must be unique.'),
     ]
 
+    @api.multi
+    @api.constrains(
+        "mrp_minimum_order_qty", "mrp_maximum_order_qty", "mrp_qty_multiple",
+        "mrp_minimum_stock", "mrp_nbr_days", "group_estimate_days",
+    )
+    def _check_negatives(self):
+        values = self.read([
+            "mrp_minimum_order_qty", "mrp_maximum_order_qty",
+            "mrp_qty_multiple",
+            "mrp_minimum_stock", "mrp_nbr_days", "group_estimate_days",
+        ])
+        for rec in values:
+            if any(v < 0 for v in rec.values()):
+                raise ValidationError(_("You cannot use a negative number."))
+
     @api.multi
     def name_get(self):
         return [(area.id, '[%s] %s' % (
diff --git a/mrp_multi_level/views/product_mrp_area_views.xml b/mrp_multi_level/views/product_mrp_area_views.xml
index 0bd3b7e61..db4df6315 100644
--- a/mrp_multi_level/views/product_mrp_area_views.xml
+++ b/mrp_multi_level/views/product_mrp_area_views.xml
@@ -51,6 +51,7 @@
                             <field name="mrp_exclude"/>
                             <field name="mrp_verified"/>
                             <field name="mrp_nbr_days"/>
+                            <field name="group_estimate_days"/>
                             <!--hide delays for now-->
                             <field name="mrp_transit_delay" invisible="1"/>
                             <field name="mrp_inspection_delay" invisible="1"/>
diff --git a/mrp_multi_level/wizards/mrp_multi_level.py b/mrp_multi_level/wizards/mrp_multi_level.py
index cb3f19a71..69241b853 100644
--- a/mrp_multi_level/wizards/mrp_multi_level.py
+++ b/mrp_multi_level/wizards/mrp_multi_level.py
@@ -58,7 +58,7 @@ class MultiLevelMrp(models.TransientModel):
             'purchase_order_id': None,
             'purchase_line_id': None,
             'stock_move_id': None,
-            'mrp_qty': -daily_qty,
+            'mrp_qty': -daily_qty * product_mrp_area.group_estimate_days,
             'current_qty': -daily_qty,
             'mrp_date': date,
             'current_date': date,
@@ -360,21 +360,28 @@ class MultiLevelMrp(models.TransientModel):
         return True
 
     @api.model
-    def _init_mrp_move_from_forecast(self, product_mrp_area):
+    def _estimates_domain(self, product_mrp_area):
         locations = product_mrp_area.mrp_area_id._get_locations()
-        today = fields.Date.today()
-        estimates = self.env['stock.demand.estimate'].search([
+        return [
             ('product_id', '=', product_mrp_area.product_id.id),
             ('location_id', 'in', locations.ids),
-            ('date_range_id.date_end', '>=', today)
-        ])
+            ('date_range_id.date_end', '>=', fields.Date.today()),
+        ]
+
+    @api.model
+    def _init_mrp_move_from_forecast(self, product_mrp_area):
+        if not product_mrp_area.group_estimate_days:
+            return False
+        today = fields.Date.today()
+        domain = self._estimates_domain(product_mrp_area)
+        estimates = self.env['stock.demand.estimate'].search(domain)
         for rec in estimates:
             start = rec.date_range_id.date_start
             if start < today:
                 start = today
             mrp_date = fields.Date.from_string(start)
             date_end = fields.Date.from_string(rec.date_range_id.date_end)
-            delta = timedelta(days=1)
+            delta = timedelta(days=product_mrp_area.group_estimate_days)
             while mrp_date <= date_end:
                 mrp_move_data = \
                     self._prepare_mrp_move_data_from_forecast(