The supply of the furnace charge provides the necessary guarantee for the iron and steel companies, but the unstable and complicated market environment exists while purchasing furnace charge.

Risk of lacking internal control in material purchase and countermeasures

Through the discussion on the quality control process as material purchase,entrance back-check,check and accept and so on,it expatiate on the means and the outline for the major project material quality control in building curtain wall.

The examination and verification work of the material purchase contract of coal enterprises includes four contents of the legality, thoroughness, impartiality and authenticity.

A supply and demand integrated material purchasing model for JIT system;

From the point of the long term corporation between buyer supplier in JIT system, this article developed an integrated material purchasing production model of facilitating multiple shipments in small lots by economic order quantity(EOQ), and solved the economic purchasing production lot which will the minimize cose for both buyer and supplier.

In this paper authors propose the concept of intelligent integrated early warning system (IIEWS), and built an intelligent integrated raw material purchase quantity-price early warning system based on analysis characteristic of raw material management in nonferrous smelt enterprise that has continues production process.