RNK Split is a method used in data analysis and statistics to divide a dataset into distinct groups based on ranking. This technique helps in identifying patterns and trends within the data by categorizing it according to specific criteria, such as performance or value. The RNK Split approach is often applied in various fields, including finance and marketing, to enhance decision-making processes. By segmenting data into ranked groups, analysts can better understand the distribution of values and make informed predictions about future outcomes.