What the BOQ is
The bill of quantities breaks the work into items (excavation, PCC, brickwork, cabling, man-months of security guards) with a description, unit and quantity for each. In an item-rate tender the bidder enters a rate per item and the BOQ totals it; in a percentage-rate tender the bidder enters one percentage above or below the estimated amount.
On CPPP and the state GePNIC portals, the BOQ is a protected Excel sheet. Bidders fill only the permitted cells, keep the file name, and upload it in the financial cover. An altered or renamed BOQ can be rejected by the portal or the evaluator.
Reading a BOQ before bidding
Price each item from your own costs, check units carefully (cum against sqm is a common slip), and watch for items with large quantities: they decide the total. A corrigendum can replace the BOQ; always quote on the latest one.