Which of the following documents can be used at the selection stage of a tender...

Explanation

Request for Information and Pre-Qualification Questionnaire can be used for short-listing suppliers. Request for Quotation is used when the only variable is price and you would like suppliers to submit a price for you. Invitation to Tender would be the next stage after RFI / PPQ- this is sent out to those suppliers who have passed selection, and details the second stage of the competition. See p.75 for more details.