To solve the problem of design change of auto panel dies,the integrated information in different developing stages of auto panel dies is firstly analyzed.

Their are effective measures of costs control for mountainous expressway construction,such as aborative design,enhancement of follow-up service of design,strengthening of management for design change,positive cooperation among all the participants of the construction,strictly controlling of design change.

Due to the start of construction in a hurry,some design changes and optimization have been made after the start of project construction,such as increasing the rated head of unit,adoption of gravity dam connecting with two banks,using GIS for switchyard equipment,river closure ahead o.

Issues related to change of design are discussed in terms of procedure and principle of design change.

Strength site attestation and design alteration management and improve engineering benefit;

Discussion of HVAC design alteration and management of project licenses;

Aim at the distinctness of design alteration procedure in current code and standard, put forward some opinion.

On the management of the project visa and design alternation;

Measures to strengthen the management of design alternation and project license;

The measure on improving the economic benefit of an enterprise through strengthening management of design alternation and on-site certificate;

,strengthening demand management in software enterprises,explicating control ways and main points in software design modification as well as doing software disposition management well.