Which of the following types of procurement is most frequently used when a customer has...

An Invitation to Bid (ITB) is typically used when the buyer has clearly defined requirements and a good understanding of the market offerings. It focuses on obtaining competitive pricing for known solutions and is suitable for well-specified projects where minimal deviation is expected.

B (Request for proposals) is used when buyer needs input on how to meet requirements.

C (Sole source) limits competition and is only used under specific conditions.

D (Request for quote) is generally used for lower-cost, commodity items.