- large contract value
          - chi-square test for outliers / standard dev from mean/median
          - percent of total contracts for supplier/agency
   $heuristics["METADATA_DUPLICATED_DESCRIPTION"] = Array(
	"description" => "unusual value for time of year");
function METADATA_DUPLICATED_DESCRIPTION($cn)
{
    	$averageContractPeriod = getAverageContractPeriod();
	$diff = strtotime($cn['contractStart']) - strtotime($cn['publishDate']);
	$days = intval($diff / 24);
	return ($days > 45 ? 1 : 0);
}

        - peculiar value
        - Just under 80k, amplified if other contracts with same supplier are just under
    - unusual variation amount
        - absolute value; large reductions as well as large increases
        
           $heuristics["METADATA_DUPLICATED_DESCRIPTION"] = Array(
	"description" => "unusual value for time of year");
function METADATA_DUPLICATED_DESCRIPTION($cn)
{
    	$averageContractPeriod = getAverageContractPeriod();
	$diff = strtotime($cn['contractStart']) - strtotime($cn['publishDate']);
	$days = intval($diff / 24);
	return ($days > 45 ? 1 : 0);
}