In my research I'm using the likert scale. What is the method I can use to analyse these data... is Relative important index (RII) method suitable for this? Explain please. Thanking you

It all depends on what the survey is designed to determine.

Quote:

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It is not a question of right and wrong ways
To analyze data from Likert-type items. The
Question is more directed to answering the research
Questions meaningfully. Some techniques answer
Meaningful questions completely, others ignore
Aspects of the problem.

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Source: Analyzing Data Measured by Individual Likert-type Items (PDF) download