diff --git a/hb_server/apps/srm/serializers.py b/hb_server/apps/srm/serializers.py
index edea221..10e2b94 100644
--- a/hb_server/apps/srm/serializers.py
+++ b/hb_server/apps/srm/serializers.py
@@ -19,4 +19,8 @@ class PlanGanttSerializer(serializers.ModelSerializer):
 
     def get_children(self, obj):
         subplans = SubProductionPlan.objects.filter(production_plan=obj).order_by('process__number')
-        return SubplanGanttSerializer(instance=subplans, many=True).data
\ No newline at end of file
+        return SubplanGanttSerializer(instance=subplans, many=True).data
+
+class ProcessYieldSerializer(serializers.Serializer):
+    datetime_start = serializers.DateField(label='开始时间', required=False, allow_null=True)
+    datetime_end = serializers.DateField(label='结束时间', required=False, allow_null=True)
\ No newline at end of file
diff --git a/hb_server/apps/srm/urls.py b/hb_server/apps/srm/urls.py
index cbaf2ed..0d8a992 100644
--- a/hb_server/apps/srm/urls.py
+++ b/hb_server/apps/srm/urls.py
@@ -3,11 +3,12 @@ from rest_framework import urlpatterns
 from django.urls import path, include
 from rest_framework.routers import DefaultRouter
 
-from apps.srm.views import GanttPlan
+from apps.srm.views import GanttPlan, ProcessYieldView
 
 router = DefaultRouter()
 urlpatterns = [
     path('gantt/plan/', GanttPlan.as_view()),
+    path('process/yield/', ProcessYieldView.as_view()),
     path('', include(router.urls)),
 ]
 
diff --git a/hb_server/apps/srm/views.py b/hb_server/apps/srm/views.py
index 4551f30..175c847 100644
--- a/hb_server/apps/srm/views.py
+++ b/hb_server/apps/srm/views.py
@@ -1,9 +1,14 @@
+
 from django.shortcuts import render
 from rest_framework import serializers
-from rest_framework.generics import ListAPIView
+from rest_framework.generics import ListAPIView, CreateAPIView
+from rest_framework.views import APIView
 from rest_framework.response import Response
+from apps.mtm.models import Process, Step
 from apps.pm.models import ProductionPlan, SubProductionPlan
-from apps.srm.serializers import PlanGanttSerializer
+from apps.srm.serializers import PlanGanttSerializer, ProcessYieldSerializer
+from apps.wpm.models import WProduct, WproductFlow
+from django.db.models import Count
 # Create your views here.
 
 class GanttPlan(ListAPIView):
@@ -15,4 +20,42 @@ class GanttPlan(ListAPIView):
     queryset = ProductionPlan.objects.filter(is_deleted=False, is_planed=True).prefetch_related('subplan_plan', 'subplan_plan__process')
     ordering = ['-id']
 
+class ProcessYieldView(CreateAPIView):
+    """
+    工序成品率统计
+    """
+    perms_map = {'get':'*'}
+    serializer_class = ProcessYieldSerializer
+    
+
+    def create(self, request, *args, **kwargs):
+        serializer = self.get_serializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+        vdata = serializer.validated_data
+        wpfs = WproductFlow.objects.filter(is_lastlog=True)
+        if vdata.get('datetime_start', None):
+            wpfs = wpfs.filter(update_time__gte = vdata.get('datetime_start'))
+        if vdata.get('datetime_end', None):
+            wpfs = wpfs.filter(update_time__lte = vdata.get('datetime_end'))
+        # 根据产品日志记录进行聚合
+        count_ok_g = list(wpfs.filter(act_state__in=[WProduct.WPR_ACT_STATE_INM, 
+                    WProduct.WPR_ACT_STATE_OK, WProduct.WPR_ACT_STATE_SELLED]).values('step__process__id').annotate(count_ok=Count('id')))
+        count_notok_g = list(wpfs.filter(act_state__in=[WProduct.WPR_ACT_STATE_NOTOK, WProduct.WPR_ACT_STATE_SCRAP]).values('step__process__id', 
+                    ).annotate(count_notok=Count('id')))
+        ret = []
+        process_l = list(Process.objects.filter(is_deleted=False).order_by('number').values('id', 'name'))
+        for i in process_l:
+            ret_item = {'id':i['id'], 'name':i['name'], 'count_ok':0, 'count_notok':0, 'rate':0}
+            for m in count_ok_g:
+                if m['step__process__id'] == ret_item['id']:
+                    ret_item['count_ok'] = m['count_ok']
+            for n in count_notok_g:
+                if n['step__process__id'] == ret_item['id']:
+                    ret_item['count_notok'] = n['count_notok']
+            rate = (ret_item['count_ok']/(ret_item['count_ok']+ret_item['count_notok'])) \
+                if ret_item['count_ok']+ret_item['count_notok']>0 else 0
+            ret_item['rate'] = rate
+            ret.append(ret_item)
+        return Response(ret)
+