noun
request for proposals; RFP; invitation for bids
A formal business document used to solicit proposals or bids from potential suppliers or contractors.
新しいシステムの導入にあたり、提案依頼書を複数のベンダーに送付した。
When introducing the new system, we sent a request for proposals to several vendors.
Compound of 提案 (proposal), 依頼 (request), and 書 (document).