This paper addresses the optimization of equally cumulative hazard preventive maintenance(PM)strategy of flow line production system with minimal repair at failures.

According to the analysis & summing-up of the RBI technology of America API, bring forward a software model of qualitative evaluating algorithm in equipments risk grade, which based on Oriented-Object technology & database visual modeling technology.

This paper suggests that the financing breach is derived from the bank credit ration produced by the serious information asymmetry of small and medium-sized enterprises, diversified risk allocation mechanism and financing strategy produced by risk grade inconsistency, and credit risk produced by imperfect contacts.

The capital structure theory assumes that under a series of strict supposition such as the perfect market and information, and consistent risk grade, because debt financing can produce tax revenue benefit, the optimal financing sequence is that: debt financing comes first, and equity financing is the last choice.

Fuzzy comprehensive evaluation of item credit risk rank of commercial bank;

The aim is to analyze the loan risk through a method of data mining,with which the risk rank of loan can be forecasted,so as to help banks when they have to deal with real estate customers.

Conducting HAZOP with the guidance of PHA-Pro will not only make the safety evaluation in-depth, complete, efficient and normative, but also add a risk rank concept to the analysis, on the basis of the traditional HAZOP.

The result shows this model provides important guidelines to bank s management on residential mortgage loans credit risk rating evaluation.

The dynamic risk rating hasn t been dealt with in current domestic lit-eratures about assessing the credit risk of bank loans.

Then quantitative analysis has been conducted on hazardous events of passenger ship collisions under the Jurisdiction area of Zhejiang MSA,and uses of ALARP risk model to determine the risk rating of those hazards.

This paper presents a units planning maintenance model based on equal-risk reliability.

This article first discussed the assessment procedure of information system,then analyse risk frequencieswhen the system is in the failue modes,and give a method to calculate risk grades.