Impact of supplier selection and supplier involvement on purchasing cost management performance;

Reducing purchasing cost is an effective way for manufacturers to cut down production cost.

Emphasis is put on the procurement cost management to reduce the cost of stocks and in further increase an enterprise's economic benefit.

This paper puts forward some concrete countermeasures for strengthening the purchasing management of enterprises from aspects of purchasers quality, procurement cost, providers management, etc.

Taking A company at Suzhou as an example, the paper analyzes a series of measures taken by the enterprise in order to lower the procurement costs.

The article perspectives the current state of Cotton industry and analyses the factors that affect the purchase cost of supply chain in cotton enterprises, then gives some feasibility pro- posals to control the purchase cost of supply chain.

Discusses how to reduce purchase cost and raise the usage rate of funds and the management of quality safety from the angle of reasonable usage of the funds in the management of purchasing medical instruments and armarium.

Controlling purchase cost is an important content for the cost management of logistics enterprises.

In the interim of the restructure of the power market in China,the grid company should guarantee the security of the operating network and balance the profit of each generation company,thus the electricity purchasing cost related to the practical generation schedule sometimes exceeds the optimal purchasing cost.

By using the optimal power flow(OPF),the relation between the electricity purchasing cost change and the line stability limit which is the product of the stability limit factor and the basic stability limit of the line,is described by the derivative of the augmented lagrangian function with respect to the line stability limit factor.

Normally traditional methods of electricity purchasing cost calculation are on the basis of certain power supply-demand balancing and ignore the uncertainty implied in the operation of power system, thus the analysis results of traditional methods cannot offer overall and valuable references.

Through analysis on the power purchase cost structure,the problems existed in the preparation and execution of power generation plan and the impact of current power generation plan preparation to the power purchase cost of power grid are pointed out.