What process involves describing customer requirements to sellers?

The process of describing customer requirements to sellers is accurately represented by the process of developing solicitation. This process involves creating documents that effectively communicate what the buyer is looking for to potential sellers or contractors. It typically entails detailing specifications, expectations, and any relevant information that will enable sellers to prepare their proposals or bids effectively.

In this context, developing solicitations ensures that all requirements are clearly articulated, which is essential for receiving accurate and comparable responses from sellers. This clarity helps in aligning what the buyer seeks with what sellers can provide, fostering an effective procurement process.

The other processes mentioned are related but serve different purposes. Planning solicitation focuses on determining the overall approach for procurement but does not involve the explicit detailing of customer requirements to sellers. Developing an offer pertains more to a seller's actions in formulating their proposal based on the requirements and specifications given. Requesting offers is specifically about the act of soliciting proposals, which comes after the requirements have already been established in the solicitation document. Thus, developing solicitation is the correct answer as it encapsulates the core activity of describing customer needs to potential sellers.