../src/main/webapp/bower_components/smartsuite/scheduler/smartsuite-scheduler-mgt-list.html

<sc-data-column data-field="exc_time" header-text="수행시간(분:초)" width="100" text-align="center" item-label-function="onItemLabel"></sc-data-column>

    onItemLabel : function(data, item)
    {
        var me = this;
        var value = data[item.dataField];

        switch (item.dataField)
        {
            case "exc_time" :
                if (UT.isNotEmpty(value))
                {
                    var _time = (new BigNumber(value)).div(1000);
                    
//                  if (_time.lt(1))
//                  {
//                     value = _time.toFormat(3);
//                  }
//                  else
//                  {
                        value = SCUtil.String.simpleFormat("{0}:{1}", _time.div(60).floor().toFormat(), ("0" + _time.mod(60).toFormat(3)).substr(-6));
//                  }
                }
                break;
        }

        return value;
    },