diff --git a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/controller/ProdReportController.java b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/controller/ProdReportController.java
index d0eb5fef..3c2cfa38 100644
--- a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/controller/ProdReportController.java
+++ b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/controller/ProdReportController.java
@@ -167,12 +167,18 @@ public class ProdReportController extends BaseController {
     }
 
     /**
-     * 在制品跟踪报表导出
+     * 在制品跟踪报表导出 - 优化版本
      */
     @RepeatSubmit()
     @PostMapping("/wipTrackingReport/export")
     public void wipTrackingReportExport(@RequestParam(required = false) Map hashMap, HttpServletResponse response) {
+        // 获取报表数据
         List<WipTrackingReportVo> list = prodReportService.wipTrackingReportList(hashMap);
-        ExcelUtil.exportExcel(list, "在制品跟踪报表", WipTrackingReportVo.class, response);
+        
+        // 转换为导出专用VO
+        List<WipTrackingReportExportVo> exportList = prodReportService.convertToExportVo(list);
+        
+        // 使用EasyExcel导出，保持与页面相同的样式和数据
+        ExcelUtil.exportExcel(exportList, "在制品跟踪报表", WipTrackingReportExportVo.class, response);
     }
 }
diff --git a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/domain/vo/ProcessProgressVo.java b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/domain/vo/ProcessProgressVo.java
index 154bfd84..832e24b5 100644
--- a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/domain/vo/ProcessProgressVo.java
+++ b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/domain/vo/ProcessProgressVo.java
@@ -4,9 +4,11 @@ import lombok.Data;
 
 import java.io.Serial;
 import java.io.Serializable;
+import java.math.BigDecimal;
+import java.time.LocalDateTime;
 
 /**
- * 工序进度VO
+ * 工序进度VO - 优化版本
  *
  * @author Yinq
  * @date 2025-01-25
@@ -17,6 +19,11 @@ public class ProcessProgressVo implements Serializable {
     @Serial
     private static final long serialVersionUID = 1L;
 
+    /**
+     * 产品订单ID（用于批量查询结果分组）
+     */
+    private Long productOrderId;
+
     /**
      * 工序ID
      */
@@ -33,7 +40,7 @@ public class ProcessProgressVo implements Serializable {
     private Integer processOrder;
 
     /**
-     * 工序状态：0未派工 1已派工 2已开始 3已完成
+     * 工序状态：0未派工 1已派工 2进行中 3已完成
      */
     private String planStatus;
 
@@ -43,7 +50,52 @@ public class ProcessProgressVo implements Serializable {
     private String statusDesc;
 
     /**
-     * 是否已完成
+     * 是否已完成（1是 0否）
      */
-    private Boolean isCompleted;
+    private Integer isCompleted;
+
+    /**
+     * 是否进行中（1是 0否）
+     */
+    private Integer isInProgress;
+
+    /**
+     * 计划数量
+     */
+    private BigDecimal planAmount;
+
+    /**
+     * 完成数量
+     */
+    private BigDecimal completeAmount;
+
+    /**
+     * 剩余数量
+     */
+    private BigDecimal remainingAmount;
+
+    /**
+     * 工序进度百分比
+     */
+    private BigDecimal processProgress;
+
+    /**
+     * 计划开始时间
+     */
+    private LocalDateTime planBeginTime;
+
+    /**
+     * 计划结束时间
+     */
+    private LocalDateTime planEndTime;
+
+    /**
+     * 实际开始时间
+     */
+    private LocalDateTime realBeginTime;
+
+    /**
+     * 实际结束时间
+     */
+    private LocalDateTime realEndTime;
 }
\ No newline at end of file
diff --git a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/domain/vo/WipTrackingReportVo.java b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/domain/vo/WipTrackingReportVo.java
index be556ffc..f1ef39e7 100644
--- a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/domain/vo/WipTrackingReportVo.java
+++ b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/domain/vo/WipTrackingReportVo.java
@@ -29,6 +29,11 @@ public class WipTrackingReportVo implements Serializable {
      */
     private Long productOrderId;
 
+    /**
+     * 租户ID（用于批量查询工序进度的租户过滤）
+     */
+    private Long tenantId;
+
     /**
      * 生产订单号
      */
diff --git a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/mapper/ProdReportMapper.java b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/mapper/ProdReportMapper.java
index 61c2c762..1461383b 100644
--- a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/mapper/ProdReportMapper.java
+++ b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/mapper/ProdReportMapper.java
@@ -119,7 +119,16 @@ public interface ProdReportMapper {
     List<WipTrackingReportVo> wipTrackingReportList(@Param("map") Map hashMap);
 
     /**
-     * 获取订单的工序进度详情
+     * 获取订单的工序进度详情（单订单）
      */
     List<ProcessProgressVo> getOrderProcessProgress(@Param("productOrderId") Long productOrderId, @Param("planTableName") String planTableName);
+
+    /**
+     * 批量获取订单的工序进度详情（避免N+1，一次查询一个工序表）
+     * @param productOrderIds 订单ID列表
+     * @param planTableName 工序表名（prod_plan_info_2/_3/_4）
+     * @return 工序进度明细
+     */
+    List<ProcessProgressVo> getOrdersProcessProgressBatch(@Param("productOrderIds") List<Long> productOrderIds,
+                                                          @Param("planTableName") String planTableName);
 }
diff --git a/ruoyi-modules/hwmom-mes/src/main/resources/mapper/mes/ProdReportMapper.xml b/ruoyi-modules/hwmom-mes/src/main/resources/mapper/mes/ProdReportMapper.xml
index 0eb9094a..9e4c199e 100644
--- a/ruoyi-modules/hwmom-mes/src/main/resources/mapper/mes/ProdReportMapper.xml
+++ b/ruoyi-modules/hwmom-mes/src/main/resources/mapper/mes/ProdReportMapper.xml
@@ -216,8 +216,8 @@
             <if test="map.beginDate != null  and map.beginDate != '' and map.endDate != null  and map.endDate != ''">
                  FORMAT(ppd.create_time, 'yyyy-MM-dd') BETWEEN #{map.beginDate} AND #{map.endDate}
             </if>
-<!--            <if test="map.processId != null and map.processId != ''">-->
-<!--                AND ppi.process_id = #{map.processId}-->
+<!--            <if test="map.processId != null and map.processId != ''">
+<!--                AND ppi.process_id = #{map.processId}
 <!--            </if>-->
             <if test="map.machineId != null and map.machineId != ''">
                 AND ppi.release_id = #{map.machineId}
@@ -296,48 +296,18 @@
         ORDER BY ppd.real_begin_time DESC, ppi.plan_id DESC
     </select>
 
-    <!-- 在制品跟踪报表 -->
+    <!-- 在制品跟踪报表 - 高性能优化版本（进一步优化：限制工序统计范围到已过滤订单，避免全表扫描；使用索引友好时间过滤） -->
     <select id="wipTrackingReportList" resultType="org.dromara.mes.domain.vo.WipTrackingReportVo">
-        SELECT
-            o.product_order_id AS productOrderId,
-            o.order_code AS orderCode,
-            m.material_code AS materialCode,
-            m.material_name AS materialName,
-            m.material_spec AS materialSpec,
-            CAST(o.plan_amount AS DECIMAL(18,2)) AS planAmount,
-            CAST(ISNULL(o.plan_amount,0) - ISNULL(o.complete_amount,0) AS DECIMAL(18,2)) AS wipAmount,
-            CAST(ISNULL(o.complete_amount,0) AS DECIMAL(18,2)) AS completeAmount,
-            o.plan_begin_time AS planBeginTime,
-            o.real_begin_time AS realBeginTime,
-            o.plan_end_time AS planEndTime,
-            GETDATE() AS currentTime,
-            '3道' AS totalProcessCount,
-            '在制工序' AS wipProcesses,
-            '剩余工序' AS remainingProcesses,
-            CONCAT(
-                CAST(
-                    CASE WHEN o.plan_amount > 0
-                    THEN (CAST(ISNULL(o.complete_amount,0) AS DECIMAL(18,6)) / CAST(o.plan_amount AS DECIMAL(18,6))) * 100
-                    ELSE 0 END
-                AS DECIMAL(10,2)), '%'
-            ) AS overallProgress,
-            CASE
-                WHEN o.plan_end_time IS NOT NULL AND GETDATE() > o.plan_end_time AND ISNULL(o.complete_amount,0) &lt; o.plan_amount
-                THEN '延期'
-                ELSE '正常'
-            END AS progressStatus,
-            3 AS totalProcessCountNum,
-            CAST(0 AS DECIMAL(18,2)) AS wipWeightedSum,
-            CAST(
-                CASE WHEN o.plan_amount > 0
-                THEN (CAST(ISNULL(o.complete_amount,0) AS DECIMAL(18,6)) / CAST(o.plan_amount AS DECIMAL(18,6))) * 100
-                ELSE 0 END
-            AS DECIMAL(10,2)) AS overallProgressNum
-        FROM prod_order_info o
-        JOIN base_material_info m ON m.material_id = o.material_id
-        <where>
+        WITH Orders AS (
+            -- 先根据筛选条件提取订单范围，避免后续工序统计对全库扫描（索引友好）
+            SELECT o.product_order_id, o.tenant_id
+            FROM prod_order_info o
+            INNER JOIN base_material_info m ON m.material_id = o.material_id
+            WHERE m.del_flag = '0'
             <if test="map.beginDate != null and map.beginDate != '' and map.endDate != null and map.endDate != ''">
-                AND FORMAT(o.plan_begin_time, 'yyyy-MM-dd') BETWEEN #{map.beginDate} AND #{map.endDate}
+                -- 时间范围过滤：避免对列使用函数，保持索引可用
+                AND o.plan_begin_time &gt;= CAST(#{map.beginDate} AS DATETIME)
+                AND o.plan_begin_time &lt; DATEADD(day, 1, CAST(#{map.endDate} AS DATETIME))
             </if>
             <if test="map.orderCode != null and map.orderCode != ''">
                 AND o.order_code LIKE CONCAT('%', #{map.orderCode}, '%')
@@ -348,6 +318,139 @@
             <if test="map.materialCode != null and map.materialCode != ''">
                 AND m.material_code LIKE CONCAT('%', #{map.materialCode}, '%')
             </if>
+        ),
+        ProcessStats AS (
+            -- 统计每个订单的工序进度信息，仅统计已过滤的订单范围（UNION ALL 提升性能）
+            SELECT 
+                ap.product_order_id,
+                ap.tenant_id,
+                COUNT(*) AS totalProcessCount,
+                SUM(CASE WHEN ap.plan_status = '3' THEN 1 ELSE 0 END) AS completedProcessCount,
+                SUM(CASE WHEN ap.plan_status = '2' THEN 1 ELSE 0 END) AS wipProcessCount,
+                MAX(CASE WHEN ap.plan_status = '3' THEN ap.process_order ELSE 0 END) AS maxCompletedOrder,
+                -- 在制工序名称（进行中的工序）
+                STRING_AGG(CASE WHEN ap.plan_status = '2' THEN ap.process_name END, ',') AS wipProcessNames,
+                -- 剩余工序名称（未派工和已派工但未开始的工序）
+                STRING_AGG(CASE WHEN ap.plan_status IN ('0','1') THEN ap.process_name END, ',') AS remainingProcessNames,
+                -- 在制品数量加权计算
+                SUM(CASE WHEN ap.plan_status = '2' THEN ISNULL(ap.plan_amount - ap.complete_amount, 0) * ap.process_order ELSE 0 END) AS wipWeightedSum
+            FROM (
+                -- 半制品工序（prod_plan_info_2）
+                SELECT 
+                    p2.product_order_id,
+                    p2.tenant_id,
+                    p2.process_id,
+                    p2.process_order,
+                    p2.plan_status,
+                    p2.plan_amount,
+                    p2.complete_amount,
+                    pr2.process_name
+                FROM prod_plan_info_2 p2
+                LEFT JOIN prod_base_process_info pr2 ON pr2.process_id = p2.process_id
+                INNER JOIN Orders ord ON ord.product_order_id = p2.product_order_id AND ord.tenant_id = p2.tenant_id
+                WHERE p2.product_order_id IS NOT NULL
+                
+                UNION ALL
+                
+                -- 成型工序（prod_plan_info_3）
+                SELECT 
+                    p3.product_order_id,
+                    p3.tenant_id,
+                    p3.process_id,
+                    p3.process_order,
+                    p3.plan_status,
+                    p3.plan_amount,
+                    p3.complete_amount,
+                    pr3.process_name
+                FROM prod_plan_info_3 p3
+                LEFT JOIN prod_base_process_info pr3 ON pr3.process_id = p3.process_id
+                INNER JOIN Orders ord ON ord.product_order_id = p3.product_order_id AND ord.tenant_id = p3.tenant_id
+                WHERE p3.product_order_id IS NOT NULL
+                
+                UNION ALL
+                
+                -- 硫化工序（prod_plan_info_4）
+                SELECT 
+                    p4.product_order_id,
+                    p4.tenant_id,
+                    p4.process_id,
+                    p4.process_order,
+                    p4.plan_status,
+                    p4.plan_amount,
+                    p4.complete_amount,
+                    pr4.process_name
+                FROM prod_plan_info_4 p4
+                LEFT JOIN prod_base_process_info pr4 ON pr4.process_id = p4.process_id
+                INNER JOIN Orders ord ON ord.product_order_id = p4.product_order_id AND ord.tenant_id = p4.tenant_id
+                WHERE p4.product_order_id IS NOT NULL
+            ) AS ap
+            GROUP BY ap.product_order_id, ap.tenant_id
+        )
+        SELECT
+            o.product_order_id AS productOrderId,
+            o.order_code AS orderCode,
+            m.material_code AS materialCode,
+            m.material_name AS materialName,
+            ISNULL(m.material_spec, '') AS materialSpec,
+            CAST(o.plan_amount AS DECIMAL(18,2)) AS planAmount,
+            CAST(ISNULL(o.plan_amount,0) - ISNULL(o.complete_amount,0) AS DECIMAL(18,2)) AS wipAmount,
+            CAST(ISNULL(o.complete_amount,0) AS DECIMAL(18,2)) AS completeAmount,
+            o.plan_begin_time AS planBeginTime,
+            o.real_begin_time AS realBeginTime,
+            o.plan_end_time AS planEndTime,
+            GETDATE() AS currentTime,
+            CAST(ISNULL(ps.totalProcessCount, 0) AS VARCHAR(10)) + '道' AS totalProcessCount,
+            -- 清理工序名称中的多余逗号和空格
+            LTRIM(RTRIM(REPLACE(REPLACE(ISNULL(ps.wipProcessNames, ''), ',,', ','), ',', ','))) AS wipProcesses,
+            LTRIM(RTRIM(REPLACE(REPLACE(ISNULL(ps.remainingProcessNames, ''), ',,', ','), ',', ','))) AS remainingProcesses,
+            -- 整体进度计算：已完成数量占比 + 在制品进度占比
+            CONCAT(
+                CAST(
+                    CASE 
+                        WHEN o.plan_amount > 0 AND ps.totalProcessCount > 0
+                        THEN (
+                            -- 已完成数量占比
+                            (CAST(ISNULL(o.complete_amount,0) AS DECIMAL(18,6)) / CAST(o.plan_amount AS DECIMAL(18,6))) * 100 +
+                            -- 在制品进度占比：(在制数量/计划总数量) * (当前工序位置/总工序数)
+                            (CAST(ISNULL(o.plan_amount - o.complete_amount,0) AS DECIMAL(18,6)) / CAST(o.plan_amount AS DECIMAL(18,6))) * 
+                            (CAST(ISNULL(ps.maxCompletedOrder, 0) + 1 AS DECIMAL(18,6)) / CAST(ps.totalProcessCount AS DECIMAL(18,6))) * 100
+                        )
+                        WHEN o.plan_amount > 0
+                        THEN (CAST(ISNULL(o.complete_amount,0) AS DECIMAL(18,6)) / CAST(o.plan_amount AS DECIMAL(18,6))) * 100
+                        ELSE 0 
+                    END
+                AS DECIMAL(10,2)), '%'
+            ) AS overallProgress,
+            -- 进度状态判断：延期或正常
+            CASE
+                WHEN o.plan_end_time IS NOT NULL AND GETDATE() > o.plan_end_time AND ISNULL(o.complete_amount,0) &lt; o.plan_amount
+                THEN '延期'
+                ELSE '正常'
+            END AS progressStatus,
+            ISNULL(ps.totalProcessCount, 0) AS totalProcessCountNum,
+            CAST(ISNULL(ps.wipWeightedSum, 0) AS DECIMAL(18,2)) AS wipWeightedSum,
+            -- 数值型整体进度
+            CAST(
+                CASE 
+                    WHEN o.plan_amount > 0 AND ps.totalProcessCount > 0
+                    THEN (
+                        -- 已完成数量占比
+                        (CAST(ISNULL(o.complete_amount,0) AS DECIMAL(18,6)) / CAST(o.plan_amount AS DECIMAL(18,6))) * 100 +
+                        -- 在制品进度占比
+                        (CAST(ISNULL(o.plan_amount - o.complete_amount,0) AS DECIMAL(18,6)) / CAST(o.plan_amount AS DECIMAL(18,6))) * 
+                        (CAST(ISNULL(ps.maxCompletedOrder, 0) + 1 AS DECIMAL(18,6)) / CAST(ps.totalProcessCount AS DECIMAL(18,6))) * 100
+                    )
+                    WHEN o.plan_amount > 0
+                    THEN (CAST(ISNULL(o.complete_amount,0) AS DECIMAL(18,6)) / CAST(o.plan_amount AS DECIMAL(18,6))) * 100
+                    ELSE 0 
+                END
+            AS DECIMAL(10,2)) AS overallProgressNum
+        FROM prod_order_info o
+        INNER JOIN base_material_info m ON m.material_id = o.material_id
+        INNER JOIN Orders ord ON ord.product_order_id = o.product_order_id AND ord.tenant_id = o.tenant_id
+        LEFT JOIN ProcessStats ps ON ps.product_order_id = o.product_order_id AND ps.tenant_id = o.tenant_id
+        <where>
+            <!-- 进度状态过滤单独保留在最终结果上 -->
             <if test="map.progressStatus != null and map.progressStatus != ''">
                 AND CASE
                     WHEN o.plan_end_time IS NOT NULL AND GETDATE() > o.plan_end_time AND ISNULL(o.complete_amount,0) &lt; o.plan_amount
@@ -356,27 +459,92 @@
                 END = #{map.progressStatus}
             </if>
         </where>
-        ORDER BY o.order_code
+        ORDER BY o.order_code DESC
     </select>
 
-    <!-- 获取订单的工序进度详情 -->
+    <!-- 获取订单的工序进度详情 - 高性能优化版本（保留单订单查询，不返回productOrderId以兼容旧用法） -->
     <select id="getOrderProcessProgress" resultType="org.dromara.mes.domain.vo.ProcessProgressVo">
         SELECT
             p.process_id AS processId,
-            pr.process_name AS processName,
-            p.process_order AS processOrder,
-            p.plan_status AS planStatus,
-            CASE p.plan_status
+            ISNULL(pr.process_name, '未知工序') AS processName,
+            ISNULL(p.process_order, 0) AS processOrder,
+            ISNULL(p.plan_status, '0') AS planStatus,
+            CASE ISNULL(p.plan_status, '0')
                 WHEN '0' THEN '未派工'
                 WHEN '1' THEN '已派工'
                 WHEN '2' THEN '进行中'
                 WHEN '3' THEN '已完成'
                 ELSE '未知'
             END AS statusDesc,
-            CASE WHEN p.plan_status = '3' THEN 1 ELSE 0 END AS isCompleted
+            CASE WHEN p.plan_status = '3' THEN 1 ELSE 0 END AS isCompleted,
+            CASE WHEN p.plan_status = '2' THEN 1 ELSE 0 END AS isInProgress,
+            CAST(ISNULL(p.plan_amount, 0) AS DECIMAL(18,2)) AS planAmount,
+            CAST(ISNULL(p.complete_amount, 0) AS DECIMAL(18,2)) AS completeAmount,
+            CAST(ISNULL(p.plan_amount, 0) - ISNULL(p.complete_amount, 0) AS DECIMAL(18,2)) AS remainingAmount,
+            -- 工序进度百分比
+            CAST(
+                CASE
+                    WHEN ISNULL(p.plan_amount, 0) > 0
+                    THEN (CAST(ISNULL(p.complete_amount, 0) AS DECIMAL(18,6)) / CAST(p.plan_amount AS DECIMAL(18,6))) * 100
+                    ELSE 0
+                END
+            AS DECIMAL(10,2)) AS processProgress,
+            -- 计划开始时间和结束时间
+            p.plan_begin_time AS planBeginTime,
+            p.plan_end_time AS planEndTime,
+            p.real_begin_time AS realBeginTime,
+            p.real_end_time AS realEndTime
         FROM ${planTableName} p
         LEFT JOIN prod_base_process_info pr ON pr.process_id = p.process_id
         WHERE p.product_order_id = #{productOrderId}
         ORDER BY p.process_order
     </select>
+
+    <!-- 批量获取订单的工序进度详情（避免N+1，一次查询一个工序表） -->
+    <!-- 说明：
+         1. 通过 IN 子句一次性查询多个订单的工序进度，显著减少数据库往返，提高性能；
+         2. 返回 product_order_id 字段用于在服务层进行分组映射；
+         3. 该SQL按订单ID与工序顺序排序，便于后续按工序顺序展示；
+    -->
+    <select id="getOrdersProcessProgressBatch" resultType="org.dromara.mes.domain.vo.ProcessProgressVo">
+        SELECT
+            p.product_order_id AS productOrderId,
+            p.process_id AS processId,
+            ISNULL(pr.process_name, '未知工序') AS processName,
+            ISNULL(p.process_order, 0) AS processOrder,
+            ISNULL(p.plan_status, '0') AS planStatus,
+            CASE ISNULL(p.plan_status, '0')
+                WHEN '0' THEN '未派工'
+                WHEN '1' THEN '已派工'
+                WHEN '2' THEN '进行中'
+                WHEN '3' THEN '已完成'
+                ELSE '未知'
+            END AS statusDesc,
+            CASE WHEN p.plan_status = '3' THEN 1 ELSE 0 END AS isCompleted,
+            CASE WHEN p.plan_status = '2' THEN 1 ELSE 0 END AS isInProgress,
+            CAST(ISNULL(p.plan_amount, 0) AS DECIMAL(18,2)) AS planAmount,
+            CAST(ISNULL(p.complete_amount, 0) AS DECIMAL(18,2)) AS completeAmount,
+            CAST(ISNULL(p.plan_amount, 0) - ISNULL(p.complete_amount, 0) AS DECIMAL(18,2)) AS remainingAmount,
+            CAST(
+                CASE
+                    WHEN ISNULL(p.plan_amount, 0) > 0
+                    THEN (CAST(ISNULL(p.complete_amount, 0) AS DECIMAL(18,6)) / CAST(p.plan_amount AS DECIMAL(18,6))) * 100
+                    ELSE 0
+                END
+            AS DECIMAL(10,2)) AS processProgress,
+            p.plan_begin_time AS planBeginTime,
+            p.plan_end_time AS planEndTime,
+            p.real_begin_time AS realBeginTime,
+            p.real_end_time AS realEndTime
+        FROM ${planTableName} p
+        LEFT JOIN prod_base_process_info pr ON pr.process_id = p.process_id
+        WHERE p.product_order_id IN
+        <foreach collection="productOrderIds" item="id" open="(" separator="," close=")">
+            #{id}
+        </foreach>
+        <if test="tenantId != null"> AND p.tenant_id = #{tenantId} </if>
+        ORDER BY p.product_order_id, p.process_order
+    </select>
+
+
 </mapper>