Construction Engineering-Material Purchasing Model 1.The Concept of Construction Material Engineering construction materials refer to building materials, construction components and equipment. 2.There are many modes of international material procurement, such as: (1) The owner purchases by himself; (2) To agree with the contractor that certain materials shall be designated suppliers; (3) Contractor procurement, etc. 3.China's "Building Law" has made specific provisions on material procurement methods: In accordance with the contract, if construction materials, construction components and equipment are purchased by the project contractor, the issuing unit shall not designate the contractor to purchase construction materials, construction components and equipment for the project, or designate the production plant or supplier. 4.Procedures to be followed in material procurement management (1) Define the basic requirements, purchasing division of labor and related responsibilities of purchasing products or services; (2) plan purchasing and prepare purchasing plans; (3) conduct market research, select qualified suppliers or service units and establish a list; (4) conduct evaluation work by means of tendering or negotiation to determine suppliers or service units; (5) sign procurement contracts; (5) transport, validation and transfer procurement.Products or services; _Disposal of substandard products or services that do not meet the requirements; _Filing of procurement information.