diff --git a/src/components/04_product-service/BasicInfoProduct.vue b/src/components/04_product-service/BasicInfoProduct.vue
index 150af00b..2d98640a 100644
--- a/src/components/04_product-service/BasicInfoProduct.vue
+++ b/src/components/04_product-service/BasicInfoProduct.vue
@@ -141,6 +141,7 @@ watch(
         :label="$t('productService.product.processingTime')"
         v-model="process"
         type="number"
+        min="0"
       >
         <template #prepend>
           <q-icon
diff --git a/src/components/04_product-service/WorkManagementComponent.vue b/src/components/04_product-service/WorkManagementComponent.vue
index 6b805133..df765d40 100644
--- a/src/components/04_product-service/WorkManagementComponent.vue
+++ b/src/components/04_product-service/WorkManagementComponent.vue
@@ -318,6 +318,7 @@ watch(
                     dense
                     type="number"
                     v-model="product.installmentNo"
+                    min="0"
                   />
 
                   <q-btn