The physic al-mathematical generalization and descriptions have been made through analyzing optimization of the collection of procedure's functions, harmonizing optimization of the collection of procedure's relations, integrated optimization of the collection of procedure of process.

According to process features for NC-machining the principle of processes concentrated is adopted on programming, so that to guarantee the machining accuracy of products and to raise the producing efficiency of NC machine tool.

The paper introduced the technological study for PB reactor key process, relating the key process adopted technology and quality control measures, and technological study of important product key process is very important.

Briefly analyses the quality control on raw material, welding and other key processes, emphasizes the importance of check items detailed.

Qualified and fine projects can only be achieved through the following:working out programme of process control;identifying special course and key process ;providing personnel, tools, equipments and materials which can en-sure construction process achieved ssetting up process method; working according to document for control;making various of records.