A technique for classifying problem areas according to degree of importance, and focusing attention on the most important problem areas is referred to as:

The correct answer to this open question is the following.

Although you forgot to include the options, we can say the following.

A technique for classifying problem areas according to the degree of importance, and focusing attention on the most important problem areas is referred to as the Pareto Analysis.

In Operations management, some tools help operation managers to evaluate quality systems in order to offer the best quality process in the production line. One of those tools is the Pareto analysis that allows engineers to pay attention to the important areas of a process.  The priority of the Pareto analysis is to focus on the most important problem areas and it leaves the areas or problems that are less important. In simpler terms, it establishes priorities to be solved.

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