Bulk order will be placed on sources who have successfully supplied at least 20% of the tender quantity for tendered item to any of Indian Railway production unit or Zonal Railways against single or multiple Purchase orders in last 3 Financial Years and current Financial year up to the date of tender closing. Firm must upload documentary evidence regarding the past successful supply performance like copies of Receipt Note, Inspection Certificate, Completion Report etc along with the offer without which the offer shall be summarily rejected. Other offers with successful supply performance of same item but not meeting the minimum 20% limit shall be considered for developmental order subject to maximum 20% of net procurable quantity. New/ untried sources can be considered for educational orders up to 5% of NPQ provided they should submit performance of similar item along with their offer in form of copies of Receipt Note, Inspection Certificate, Completion Report etc.