diff --git a/lib/form/form.class.php b/lib/form/form.class.php
index 0bfb552609..7059eaeee4 100644
--- a/lib/form/form.class.php
+++ b/lib/form/form.class.php
@@ -173,6 +173,7 @@ class form extends fixer
         else
         {
             $this->batchConvertField($config);
+            $this->skipRequiredCheck($config);
         }
 
         if(!empty($this->errors))
@@ -289,6 +290,38 @@ class form extends fixer
         $this->dataList = $rowDataList;
     }
 
+    /**
+     * 跳过必填项检查。
+     * Skip the required check.
+     *
+     * @param  array   $fieldConfigs
+     * @access public
+     * @return void
+     */
+    public function skipRequiredCheck(array $fieldConfigs)
+    {
+        foreach($this->dataList as $rowIndex => $rowData)
+        {
+            foreach($fieldConfigs as $field => $config)
+            {
+                if(empty($config['required']) || empty($config['skipRequired']) || !empty($rowData->$field)) continue;
+
+                $skip     = true;
+                $errorKey = isset($config['type']) && $config['type'] == 'array' ? "{$field}[{$rowIndex}][]" : "{$field}[{$rowIndex}]";
+                foreach($config['skipRequired'] as $conditionField => $conditionValue)
+                {
+                    if($rowData->$conditionField != $conditionValue)
+                    {
+                        $skip = false;
+                        break;
+                    }
+                }
+
+                if($skip) unset($this->errors[$errorKey]);
+            }
+        }
+    }
+
     /**
      * 获取$_POST的数据。
      * Get the data of $_POST.
diff --git a/module/programplan/config/form.php b/module/programplan/config/form.php
index 963e53aa23..a8957d8f70 100644
--- a/module/programplan/config/form.php
+++ b/module/programplan/config/form.php
@@ -17,8 +17,8 @@ $config->programplan->form->create['attribute']  = array('label' => $lang->progr
 $config->programplan->form->create['point']      = array('label' => $lang->programplan->point,     'type' => 'array',  'control' => 'picker',   'required' => false, 'default' => '',     'options' => array(''), 'multiple' => true);
 $config->programplan->form->create['parallel']   = array('label' => '',                            'type' => 'int',    'control' => 'hidden',   'required' => false, 'default' => 0);
 $config->programplan->form->create['acl']        = array('label' => $lang->programplan->acl,       'type' => 'string', 'control' => 'picker',   'required' => false, 'default' => 'open', 'options' => $lang->execution->aclList);
-$config->programplan->form->create['begin']      = array('label' => $lang->programplan->begin,     'type' => 'date',   'control' => 'date',     'required' => true,  'default' => null);
-$config->programplan->form->create['end']        = array('label' => $lang->programplan->end,       'type' => 'date',   'control' => 'date',     'required' => true,  'default' => null);
+$config->programplan->form->create['begin']      = array('label' => $lang->programplan->begin,     'type' => 'date',   'control' => 'date',     'required' => true,  'default' => null, 'skipRequired' => array('enabled' => 'off'));
+$config->programplan->form->create['end']        = array('label' => $lang->programplan->end,       'type' => 'date',   'control' => 'date',     'required' => true,  'default' => null, 'skipRequired' => array('enabled' => 'off'));
 $config->programplan->form->create['realBegan']  = array('label' => $lang->programplan->realBegan, 'type' => 'date',   'control' => 'date',     'required' => false, 'default' => null);
 $config->programplan->form->create['realEnd']    = array('label' => $lang->programplan->realEnd,   'type' => 'date',   'control' => 'date',     'required' => false, 'default' => null);
 $config->programplan->form->create['milestone']  = array('label' => $lang->programplan->milestone, 'type' => 'int',    'control' => 'radioList','required' => false, 'default' => 0,      'options' => $lang->programplan->milestoneList);
diff --git a/module/programplan/zen.php b/module/programplan/zen.php
index 99a7b63e7d..1b0bef0fa1 100644
--- a/module/programplan/zen.php
+++ b/module/programplan/zen.php
@@ -23,8 +23,6 @@ class programplanZen extends programplan
     {
         $beginIsZeroDate = helper::isZeroDate($plan->begin);
         $endIsZeroDate   = helper::isZeroDate($plan->end);
-        if($beginIsZeroDate) dao::$errors["begin[{$rowID}]"] = $this->lang->programplan->emptyBegin;
-        if($endIsZeroDate)   dao::$errors["end[{$rowID}]"]   = $this->lang->programplan->emptyEnd;
         if(!$beginIsZeroDate and !$endIsZeroDate and $plan->end < $plan->begin) dao::$errors["end[{$rowID}]"] = $this->lang->programplan->error->planFinishSmall;
 
         if(!empty($parent))
@@ -64,7 +62,7 @@ class programplanZen extends programplan
         foreach($plans as $rowID => $plan)
         {
             if(empty($parentID) and empty($oldPlans)) $plan->id = '';
-            $plan->days       = $this->calcDaysForStage($plan->begin, $plan->end);
+            $plan->days       = isset($plan->enabled) && $plan->enabled == 'on' ? $this->calcDaysForStage($plan->begin, $plan->end) : 0;
             $plan->project    = $projectID;
             $plan->parent     = $parentID ? $parentID : $projectID;
             $plan->order      = (int)array_shift($orders);
@@ -74,7 +72,7 @@ class programplanZen extends programplan
 
             if(in_array($this->config->edition, array('max', 'ipd')) && !dao::isError())
             {
-                $plan->planDuration = $this->programplan->getDuration($plan->begin, $plan->end);
+                $plan->planDuration = $this->programplan->getDuration((string)$plan->begin, (string)$plan->end);
                 $plan->realDuration = $this->programplan->getDuration((string)$plan->realBegan, (string)$plan->realEnd);
             }
 
@@ -83,7 +81,7 @@ class programplanZen extends programplan
 
             /* Check duplicated names to avoid to save same names. */
             if(in_array($plan->name, $names)) dao::$errors["name[{$rowID}]"] = empty($plan->type) ? $this->lang->programplan->error->sameName : str_replace($this->lang->execution->stage, '', $this->lang->programplan->error->sameName);
-            if(isset($plan->code))
+            if(isset($plan->code) && (!isset($plan->enabled) || (isset($plan->enabled) && $plan->enabled == 'on')))
             {
                 if(in_array($plan->code, $codes)) dao::$errors["code[{$rowID}]"] = sprintf($this->lang->error->repeat, $plan->type == 'stage' ? $this->lang->execution->code : $this->lang->code, $plan->code);
                 if(!empty($this->config->setCode) && empty($plan->code) && strpos(",{$this->config->execution->create->requiredFields},", ',code,') !== false) dao::$errors["code[{$rowID}]"] = sprintf($this->lang->error->notempty, $plan->type == 'stage' ? $this->lang->execution->code : $this->lang->code);