The tenderer with past performance of satisfactory execution of contracts to SC Railway, or Other Zonal Railways/Pus of same / similar items for a quantity of 20 percent or more of tendered quantity against a single contract during last three years prior to, and excluding the tender opening date may be considered as responsive to SC Railways requirements for placement of bulk and regular order. However , in cases where the tenderers are having satisfactory past supply performance of tendered items for stock items /Non stock items with IR/PU, the supply performance data available in iMMS shall be taken in to consideration while evaluating the offers of the tenders. Similar item is defined as supply of mechanical gauges or measuring instruments used for measurement, checking or setting of height, clearance, position or dimensions of springs, suspension components, mechanical assemblies or equipment, including height gauges, clearance gauges, setting gauges, inspection gauges and fabricated dimensional gauges, irrespective of variation in measuring range, dimensions, configuration or application.