| - unusual for agency/supplier | <?php |
| - previous low number of transactions | $heuristics["HISTORY_LOW_TRANSACTIONS_AGENCY"] = Array( |
| - zero ie. new agency/supplier is huge score | "description" => "unusual for agency due to previous low number of transactions " |
| - unusual value for time of year | ); |
| - compare to all other records in last 2 weeks | function HISTORY_LOW_TRANSACTIONS_AGENCY($cn) |
| - ie. many large contracts in june so takes more to standout | { |
| $thisAgencyTransactions = getAgencyTransactions($cn['agencyName']); | |
| $averageAgencyTransactions = getAverageAgencyTransactions(); | |
| $stddevAgencyTransactions = getstddevAgencyTransactions(); | |
| $diff = strtotime($cn['contractEnd']) - strtotime($cn['contractStart']); | |
| $days = intval($diff / (60 * 60 * 24)); | |
| $value = abs($days - $averageAgencyTransactions) / $stddevAgencyTransactions; | |
| return Array( | |
| "heuristic_value" => $value, | |
| "raw_value" => $days, | |
| "mean" => $averageAgencyTransactions, | |
| "stddev" => $stddevAgencyTransactions | |
| ); | |
| } | |
| $agencyTransactions = Array(); | |
| function getAgencyTransactions($agencyName) | |
| { | |
| global $agencyTransactions,$conn; | |
| if (!$agencyTransactions[$agencyName]) { | |
| $query = 'select count(*) from contractnotice where "agencyName" = \'' . pg_escape_string ($agencyName) . '"\''; | |
| $result = $conn->query($query); | |
| //echo $query; | |
| $r = $result->fetch(PDO::FETCH_BOTH); | |
| $agencyTransactions[$agencyName] = $r[0]; | |
| } | |
| return $agencyTransactions[$agencyName]; | |
| } | |
| $averageAgencyTransactions; | |
| function getAverageAgencyTransactions() | |
| { | |
| global $averageAgencyTransactions; | |
| if (!$averageAgencyTransactions) { | |
| getStatsAgencyTransactions(); | |
| } | |
| return $averageAgencyTransactions; | |
| } | |
| $stddevAgencyTransactions; | |
| function getstddevAgencyTransactions() | |
| { | |
| global $stddevAgencyTransactions; | |
| if (!$stddevAgencyTransactions) { | |
| getStatsAgencyTransactions(); | |
| } | |
| return $stddevAgencyTransactions; | |
| } | |
| function getStatsAgencyTransactions() | |
| { | |
| global $averageAgencyTransactions, $stddevAgencyTransactions,$conn; | |
| $query = 'select avg(count), STDDEV(count) from (select count(*) as count | |
| from contractnotice group by "agencyName") as a;'; | |
| $result = $conn->query($query); | |
| $r = $result->fetch(PDO::FETCH_BOTH); | |
| $averageAgencyTransactions = $r[0]; | |
| $stddevAgencyTransactions = $r[1]; | |
| } | |
| $heuristics["HISTORY_LOW_TRANSACTIONS_SUPPLIER"] = Array( | |
| "description" => "unusual for supplier due to previous low number of transactions " | |
| ); | |
| function HISTORY_LOW_TRANSACTIONS_SUPPLIER($cn) | |
| { | |
| $thisSupplierTransactions = getSupplierTransactions($cn['supplierName'], $cn['supplierABN']); | |
| $averageSupplierTransactions = getAverageSupplierTransactions(); | |
| $stddevSupplierTransactions = getstddevSupplierTransactions(); | |
| $diff = strtotime($cn['contractEnd']) - strtotime($cn['contractStart']); | |
| $days = intval($diff / (60 * 60 * 24)); | |
| $value = abs($days - $averageSupplierTransactions) / $stddevSupplierTransactions; | |
| return Array( | |
| "heuristic_value" => $value, | |
| "raw_value" => $days, | |
| "mean" => $averageSupplierTransactions, | |
| "stddev" => $stddevSupplierTransactions | |
| ); | |
| } | |
| $supplierTransactions = Array(); | |
| function getSupplierTransactions($supplierName, $supplierABN) | |
| { | |
| global $supplierTransactions,$conn; | |
| if ($supplierABN != 0 && $supplierABN != "") { | |
| if (!$supplierTransactions[$supplierABN]) { | |
| $query = "select count(*) from contractnotice where \"supplierABN\" = '" . $supplierABN . "'"; | |
| $result = $conn->query($query); | |
| $r = $result->fetch(PDO::FETCH_BOTH); | |
| $supplierTransactions[$supplierABN] = $r[0]; | |
| } | |
| return $supplierTransactions[$supplierABN]; | |
| } | |
| if (!$supplierTransactions[$supplierName]) { | |
| $query = "select count(*) from contractnotice where \"supplierName\" = '" . $supplierName . "'"; | |
| $result = $conn->query($query); | |
| $r = $result->fetch(PDO::FETCH_BOTH); | |
| $supplierTransactions[$supplierName] = $r[0]; | |
| } | |
| return $supplierTransactions[$supplierName]; | |
| } | |
| $averageSupplierTransactions; | |
| function getAverageSupplierTransactions() | |
| { | |
| global $averageSupplierTransactions; | |
| if (!$averageSupplierTransactions) { | |
| getStatsSupplierTransactions(); | |
| } | |
| return $averageSupplierTransactions; | |
| } | |
| $stddevSupplierTransactions; | |
| function getstddevSupplierTransactions() | |
| { | |
| global $stddevSupplierTransactions; | |
| if (!$stddevSupplierTransactions) { | |
| getStatsSupplierTransactions(); | |
| } | |
| return $stddevSupplierTransactions; | |
| } | |
| function getStatsSupplierTransactions() | |
| { | |
| global $averageSupplierTransactions, $stddevSupplierTransactions,$conn; | |
| $query = 'select avg(count), stddev(count) from ( | |
| select (case when "supplierABN" != 0 THEN "supplierABN"::text ELSE "supplierName" END) as "supplierID", | |
| count(*) as count from contractnotice group by "supplierID") as a;'; | |
| $result = $conn->query($query); | |
| $r = $result->fetch(PDO::FETCH_BOTH); | |
| $averageSupplierTransactions = $r[0]; | |
| $stddevSupplierTransactions = $r[1]; | |
| } | |