diff --git a/erpnext/buying/doctype/buying_settings/buying_settings.json b/erpnext/buying/doctype/buying_settings/buying_settings.json
index 95857e4..8c73e56 100644
--- a/erpnext/buying/doctype/buying_settings/buying_settings.json
+++ b/erpnext/buying/doctype/buying_settings/buying_settings.json
@@ -16,6 +16,7 @@
   "transaction_settings_section",
   "po_required",
   "pr_required",
+  "over_order_allowance",
   "column_break_12",
   "maintain_same_rate",
   "set_landed_cost_based_on_purchase_invoice_rate",
@@ -156,6 +157,13 @@
    "fieldname": "set_landed_cost_based_on_purchase_invoice_rate",
    "fieldtype": "Check",
    "label": "Set Landed Cost Based on Purchase Invoice Rate"
+  },
+  {
+   "default": "0",
+   "description": "Percentage you are allowed to order more against the Blanket Order Quantity. For example: If you have a Blanket Order of Quantity 100 units. and your Allowance is 10% then you are allowed to order 110 units.",
+   "fieldname": "over_order_allowance",
+   "fieldtype": "Float",
+   "label": "Over Order Allowance (%)"
   }
  ],
  "icon": "fa fa-cog",
@@ -163,7 +171,7 @@
  "index_web_pages_for_search": 1,
  "issingle": 1,
  "links": [],
- "modified": "2023-02-28 15:41:32.686805",
+ "modified": "2023-03-02 17:02:14.404622",
  "modified_by": "Administrator",
  "module": "Buying",
  "name": "Buying Settings",
diff --git a/erpnext/buying/doctype/purchase_order/purchase_order.py b/erpnext/buying/doctype/purchase_order/purchase_order.py
index 2415aec..06b9d29 100644
--- a/erpnext/buying/doctype/purchase_order/purchase_order.py
+++ b/erpnext/buying/doctype/purchase_order/purchase_order.py
@@ -21,6 +21,9 @@
 from erpnext.accounts.party import get_party_account, get_party_account_currency
 from erpnext.buying.utils import check_on_hold_or_closed_status, validate_for_items
 from erpnext.controllers.buying_controller import BuyingController
+from erpnext.manufacturing.doctype.blanket_order.blanket_order import (
+	validate_against_blanket_order,
+)
 from erpnext.setup.doctype.item_group.item_group import get_item_group_defaults
 from erpnext.stock.doctype.item.item import get_item_defaults, get_last_purchase_details
 from erpnext.stock.stock_balance import get_ordered_qty, update_bin_qty
@@ -69,6 +72,7 @@
 		self.validate_with_previous_doc()
 		self.validate_for_subcontracting()
 		self.validate_minimum_order_qty()
+		validate_against_blanket_order(self)
 
 		if self.is_old_subcontracting_flow:
 			self.validate_bom_for_subcontracting_items()
diff --git a/erpnext/manufacturing/doctype/blanket_order/blanket_order.js b/erpnext/manufacturing/doctype/blanket_order/blanket_order.js
index d3bb33e..7b26a14 100644
--- a/erpnext/manufacturing/doctype/blanket_order/blanket_order.js
+++ b/erpnext/manufacturing/doctype/blanket_order/blanket_order.js
@@ -7,6 +7,12 @@
 	},
 
 	setup: function(frm) {
+		frm.custom_make_buttons = {
+			'Purchase Order': 'Purchase Order',
+			'Sales Order': 'Sales Order',
+			'Quotation': 'Quotation',
+		};
+
 		frm.add_fetch("customer", "customer_name", "customer_name");
 		frm.add_fetch("supplier", "supplier_name", "supplier_name");
 	},
diff --git a/erpnext/manufacturing/doctype/blanket_order/blanket_order.py b/erpnext/manufacturing/doctype/blanket_order/blanket_order.py
index ff21401..32f1c36 100644
--- a/erpnext/manufacturing/doctype/blanket_order/blanket_order.py
+++ b/erpnext/manufacturing/doctype/blanket_order/blanket_order.py
@@ -6,6 +6,7 @@
 from frappe import _
 from frappe.model.document import Document
 from frappe.model.mapper import get_mapped_doc
+from frappe.query_builder.functions import Sum
 from frappe.utils import flt, getdate
 
 from erpnext.stock.doctype.item.item import get_item_defaults
@@ -29,21 +30,23 @@
 
 	def update_ordered_qty(self):
 		ref_doctype = "Sales Order" if self.blanket_order_type == "Selling" else "Purchase Order"
+
+		trans = frappe.qb.DocType(ref_doctype)
+		trans_item = frappe.qb.DocType(f"{ref_doctype} Item")
+
 		item_ordered_qty = frappe._dict(
-			frappe.db.sql(
-				"""
-			select trans_item.item_code, sum(trans_item.stock_qty) as qty
-			from `tab{0} Item` trans_item, `tab{0}` trans
-			where trans.name = trans_item.parent
-				and trans_item.blanket_order=%s
-				and trans.docstatus=1
-				and trans.status not in ('Closed', 'Stopped')
-			group by trans_item.item_code
-		""".format(
-					ref_doctype
-				),
-				self.name,
-			)
+			(
+				frappe.qb.from_(trans_item)
+				.from_(trans)
+				.select(trans_item.item_code, Sum(trans_item.stock_qty).as_("qty"))
+				.where(
+					(trans.name == trans_item.parent)
+					& (trans_item.blanket_order == self.name)
+					& (trans.docstatus == 1)
+					& (trans.status.notin(["Stopped", "Closed"]))
+				)
+				.groupby(trans_item.item_code)
+			).run()
 		)
 
 		for d in self.items:
@@ -79,7 +82,43 @@
 				"doctype": doctype + " Item",
 				"field_map": {"rate": "blanket_order_rate", "parent": "blanket_order"},
 				"postprocess": update_item,
+				"condition": lambda item: (flt(item.qty) - flt(item.ordered_qty)) > 0,
 			},
 		},
 	)
 	return target_doc
+
+
+def validate_against_blanket_order(order_doc):
+	if order_doc.doctype in ("Sales Order", "Purchase Order"):
+		order_data = {}
+
+		for item in order_doc.get("items"):
+			if item.against_blanket_order and item.blanket_order:
+				if item.blanket_order in order_data:
+					if item.item_code in order_data[item.blanket_order]:
+						order_data[item.blanket_order][item.item_code] += item.qty
+					else:
+						order_data[item.blanket_order][item.item_code] = item.qty
+				else:
+					order_data[item.blanket_order] = {item.item_code: item.qty}
+
+		if order_data:
+			allowance = flt(
+				frappe.db.get_single_value(
+					"Selling Settings" if order_doc.doctype == "Sales Order" else "Buying Settings",
+					"over_order_allowance",
+				)
+			)
+			for bo_name, item_data in order_data.items():
+				bo_doc = frappe.get_doc("Blanket Order", bo_name)
+				for item in bo_doc.get("items"):
+					if item.item_code in item_data:
+						remaining_qty = item.qty - item.ordered_qty
+						allowed_qty = remaining_qty + (remaining_qty * (allowance / 100))
+						if allowed_qty < item_data[item.item_code]:
+							frappe.throw(
+								_("Item {0} cannot be ordered more than {1} against Blanket Order {2}.").format(
+									item.item_code, allowed_qty, bo_name
+								)
+							)
diff --git a/erpnext/manufacturing/doctype/blanket_order/test_blanket_order.py b/erpnext/manufacturing/doctype/blanket_order/test_blanket_order.py
index 2f1f3ae..58f3c95 100644
--- a/erpnext/manufacturing/doctype/blanket_order/test_blanket_order.py
+++ b/erpnext/manufacturing/doctype/blanket_order/test_blanket_order.py
@@ -63,6 +63,33 @@
 		po1.currency = get_company_currency(po1.company)
 		self.assertEqual(po1.items[0].qty, (bo.items[0].qty - bo.items[0].ordered_qty))
 
+	def test_over_order_allowance(self):
+		# Sales Order
+		bo = make_blanket_order(blanket_order_type="Selling", quantity=100)
+
+		frappe.flags.args.doctype = "Sales Order"
+		so = make_order(bo.name)
+		so.currency = get_company_currency(so.company)
+		so.delivery_date = today()
+		so.items[0].qty = 110
+		self.assertRaises(frappe.ValidationError, so.submit)
+
+		frappe.db.set_single_value("Selling Settings", "over_order_allowance", 10)
+		so.submit()
+
+		# Purchase Order
+		bo = make_blanket_order(blanket_order_type="Purchasing", quantity=100)
+
+		frappe.flags.args.doctype = "Purchase Order"
+		po = make_order(bo.name)
+		po.currency = get_company_currency(po.company)
+		po.schedule_date = today()
+		po.items[0].qty = 110
+		self.assertRaises(frappe.ValidationError, po.submit)
+
+		frappe.db.set_single_value("Buying Settings", "over_order_allowance", 10)
+		po.submit()
+
 
 def make_blanket_order(**args):
 	args = frappe._dict(args)
diff --git a/erpnext/selling/doctype/sales_order/sales_order.py b/erpnext/selling/doctype/sales_order/sales_order.py
index 385d0f3..ee9161b 100755
--- a/erpnext/selling/doctype/sales_order/sales_order.py
+++ b/erpnext/selling/doctype/sales_order/sales_order.py
@@ -21,6 +21,9 @@
 )
 from erpnext.accounts.party import get_party_account
 from erpnext.controllers.selling_controller import SellingController
+from erpnext.manufacturing.doctype.blanket_order.blanket_order import (
+	validate_against_blanket_order,
+)
 from erpnext.manufacturing.doctype.production_plan.production_plan import (
 	get_items_for_material_requests,
 )
@@ -52,6 +55,7 @@
 		self.validate_warehouse()
 		self.validate_drop_ship()
 		self.validate_serial_no_based_delivery()
+		validate_against_blanket_order(self)
 		validate_inter_company_party(
 			self.doctype, self.customer, self.company, self.inter_company_order_reference
 		)
diff --git a/erpnext/selling/doctype/selling_settings/selling_settings.json b/erpnext/selling/doctype/selling_settings/selling_settings.json
index 6ea66a0..45ad7d9 100644
--- a/erpnext/selling/doctype/selling_settings/selling_settings.json
+++ b/erpnext/selling/doctype/selling_settings/selling_settings.json
@@ -24,6 +24,7 @@
   "so_required",
   "dn_required",
   "sales_update_frequency",
+  "over_order_allowance",
   "column_break_5",
   "allow_multiple_items",
   "allow_against_multiple_purchase_orders",
@@ -179,6 +180,12 @@
    "fieldname": "allow_sales_order_creation_for_expired_quotation",
    "fieldtype": "Check",
    "label": "Allow Sales Order Creation For Expired Quotation"
+  },
+  {
+   "description": "Percentage you are allowed to order more against the Blanket Order Quantity. For example: If you have a Blanket Order of Quantity 100 units. and your Allowance is 10% then you are allowed to order 110 units.",
+   "fieldname": "over_order_allowance",
+   "fieldtype": "Float",
+   "label": "Over Order Allowance (%)"
   }
  ],
  "icon": "fa fa-cog",
@@ -186,7 +193,7 @@
  "index_web_pages_for_search": 1,
  "issingle": 1,
  "links": [],
- "modified": "2023-02-04 12:37:53.380857",
+ "modified": "2023-03-03 11:16:54.333615",
  "modified_by": "Administrator",
  "module": "Selling",
  "name": "Selling Settings",