diff --git a/src/main/resources/mappers/pwrGnrSimulation/pwrGnrSimMapper.xml b/src/main/resources/mappers/pwrGnrSimulation/pwrGnrSimMapper.xml
index 8c8a2254..640e3a11 100644
--- a/src/main/resources/mappers/pwrGnrSimulation/pwrGnrSimMapper.xml
+++ b/src/main/resources/mappers/pwrGnrSimulation/pwrGnrSimMapper.xml
@@ -49,16 +49,16 @@
         SELECT
             B.ITEM_ID
              , B.ITEM_NO
-             ,SUM(B.AMOUNT) AS AMOUNT
+             , MAX(B.AMOUNT) AS AMOUNT
              , C.CNV_EFF
              , C.AMP
              , B.SPECIFICATION
-        FROM  T_ROOF_ITEM_ESTIMATE B WITH (NOLOCK)
+        FROM  T_PART_ESTIMATE B WITH (NOLOCK)
         INNER JOIN M_ITEM C WITH (NOLOCK)
-            ON B.ITEM_ID = C.ITEM_ID
-        WHERE B.OBJECT_NO = #{objectNo}
+        ON B.ITEM_ID = C.ITEM_ID
+        WHERE C.ITEM_GROUP ='PC_'
+          AND B.OBJECT_NO = #{objectNo}
           AND B.PLAN_NO = #{planNo}
-          AND C.ITEM_GROUP ='PC_'
         group by B.ITEM_ID, B.ITEM_NO, C.CNV_EFF , C.AMP ,B.SPECIFICATION
         ORDER BY B.SPECIFICATION
         /* TODO :: 직렬,병렬 조건 추가필요 */