After administrative approval and budgeting, a tender is prepared to invite experienced contractors to execute a work. The tender includes details of the work, terms, and conditions. There are three methods to invite tenders: public/open tender, limited/selected tender, and single tender. For public tenders, a notice is published to allow any eligible contractor to apply. Limited tenders are sent only to reputed contractors for specialized works. Single tenders are used for proprietary items and involve negotiating with one contractor. The tender documents provide full specifications and requirements for contractors to quote competitive bids.