Start with the product you actually intend to buy. “Good human hair” is too vague to test. Specify the construction, usable length, weight basis, physical colour target, texture, material description and pack layout. Mark unknown fields as questions instead of silently accepting the supplier’s default. This makes the response itself useful evidence of technical communication.
For a first review, avoid changing hair grade, shade, length and attachment at the same time. Choose one representative configuration and one deliberately difficult requirement, such as a rooted colour transition or an agreed seam layout. Ask whether the proposed sample uses the process intended for production. A display sample from another programme may not answer that question.
Define product units and configuration examples · Use an existing RFQ worksheet

