This document provides guidance to potential bidders on the Asian Development Bank's procurement process. It outlines that the borrower is solely responsible for procurement, while ADB ensures the process follows agreed procedures. ADB reviews documents and can declare misprocurement if procedures aren't followed. Bidders should carefully review bidding documents for clarity and raise any issues with the borrower. The evaluation process is confidential until contract award is published. Bidders can communicate issues to ADB, but ADB will typically refer them to the borrower for response before the bid submission deadline and only examine communications after bid opening in major procurements.