First grasp three things: what the customer asked, who is currently handling it, and what information is still missing for the next step. The article treats how to respond to inquiries, how to provide quotations, and response speed as operational work that manufacturers need to participate in. In practice, you can centralize inquiry records, quotation records, and related discussions, handling them according to your company's workflow. Each time you send a quotation, retain that version; when making revisions through back-and-forth exchanges, compare the differences. This ensures you know where the discussion stands and allows management to see outstanding items, rather than assuming the matter is handled once a quotation is sent.