Index: backoffice/js/invoiceBilling.js
===================================================================
diff -u -rb2af5eef60b0cc50cc3982a901a3a393b2889fe8 -rabf2bec5ad4b5581a20f1958c93eb854e732caca
--- backoffice/js/invoiceBilling.js	(.../invoiceBilling.js)	(revision b2af5eef60b0cc50cc3982a901a3a393b2889fe8)
+++ backoffice/js/invoiceBilling.js	(.../invoiceBilling.js)	(revision abf2bec5ad4b5581a20f1958c93eb854e732caca)
@@ -56,8 +56,6 @@
             "../reference/jquery-plugins/dataTables-1.10.16/extensions/Buttons/js/buttons.html5.js",
             "../reference/jquery-plugins/dataTables-1.10.16/extensions/Buttons/js/buttons.print.js",
             "../reference/jquery-plugins/dataTables-1.10.16/extensions/Buttons/js/jszip.min.js",
-            "../reference/jquery-plugins/dataTables-1.10.16/extensions/Buttons/js/pdfmake.min.js",
-            "../reference/jquery-plugins/dataTables-1.10.16/extensions/Buttons/js/vfs_fonts.js",
             // timezone-picker
             "../reference/jquery-plugins/kevalbhatt-timezone-picker-2.0.0/dist/timezone-picker.min.js",
             "../reference/jquery-plugins/kevalbhatt-timezone-picker-2.0.0/dist/styles/timezone-picker.css"
@@ -69,6 +67,22 @@
         .then(function () {
             console.log("모든 플러그인 로드 완료");
 
+            //vfs_fonts 파일이 커서 defer 처리 함.
+            setTimeout(function () {
+                var script = document.createElement("script");
+                script.src = "../reference/jquery-plugins/dataTables-1.10.16/extensions/Buttons/js/vfs_fonts.js";
+                script.defer = true; // defer 속성 설정
+                document.head.appendChild(script);
+            }, 5000); // 5초 후에 실행됩니다.
+
+            //pdfmake 파일이 커서 defer 처리 함.
+            setTimeout(function () {
+                var script = document.createElement("script");
+                script.src = "../reference/jquery-plugins/dataTables-1.10.16/extensions/Buttons/js/pdfmake.min.js";
+                script.defer = true; // defer 속성 설정
+                document.head.appendChild(script);
+            }, 5000); // 5초 후에 실행됩니다.
+
             // 사이드 메뉴 색상 설정
             $(".widget").widgster();
             setSideMenu("sidebar_menu_system", "sidebar_menu_system_billing");
Index: backoffice/js/systemInfo.js
===================================================================
diff -u -rb2af5eef60b0cc50cc3982a901a3a393b2889fe8 -rabf2bec5ad4b5581a20f1958c93eb854e732caca
--- backoffice/js/systemInfo.js	(.../systemInfo.js)	(revision b2af5eef60b0cc50cc3982a901a3a393b2889fe8)
+++ backoffice/js/systemInfo.js	(.../systemInfo.js)	(revision abf2bec5ad4b5581a20f1958c93eb854e732caca)
@@ -56,8 +56,6 @@
 			"../reference/jquery-plugins/dataTables-1.10.16/extensions/Buttons/js/buttons.html5.js",
 			"../reference/jquery-plugins/dataTables-1.10.16/extensions/Buttons/js/buttons.print.js",
 			"../reference/jquery-plugins/dataTables-1.10.16/extensions/Buttons/js/jszip.min.js",
-			"../reference/jquery-plugins/dataTables-1.10.16/extensions/Buttons/js/pdfmake.min.js",
-			"../reference/jquery-plugins/dataTables-1.10.16/extensions/Buttons/js/vfs_fonts.js",
 			// timezone-picker
 			"../reference/jquery-plugins/kevalbhatt-timezone-picker-2.0.0/dist/timezone-picker.min.js",
 			"../reference/jquery-plugins/kevalbhatt-timezone-picker-2.0.0/dist/styles/timezone-picker.css"
@@ -69,6 +67,22 @@
 		.then(function () {
 			console.log("모든 플러그인 로드 완료");
 
+			//vfs_fonts 파일이 커서 defer 처리 함.
+			setTimeout(function () {
+				var script = document.createElement("script");
+				script.src = "../reference/jquery-plugins/dataTables-1.10.16/extensions/Buttons/js/vfs_fonts.js";
+				script.defer = true; // defer 속성 설정
+				document.head.appendChild(script);
+			}, 5000); // 5초 후에 실행됩니다.
+
+			//pdfmake 파일이 커서 defer 처리 함.
+			setTimeout(function () {
+				var script = document.createElement("script");
+				script.src = "../reference/jquery-plugins/dataTables-1.10.16/extensions/Buttons/js/pdfmake.min.js";
+				script.defer = true; // defer 속성 설정
+				document.head.appendChild(script);
+			}, 5000); // 5초 후에 실행됩니다.
+
 			// 사이드 메뉴 색상 설정
 			$(".widget").widgster();
 			setSideMenu("sidebar_menu_system", "sidebar_menu_system_info");