A premium based partially, if not exclusively, on the underwriter's evaluation of an individual risk and its loss potential is called

Merit rating refers to a system where premiums are adjusted based on the insured's past loss experience and behavior rather than solely on the underwriter's assessment. It often takes into account the insured's claim history, rewarding good risk management with lower premiums. This method does not rely primarily on individual evaluation but rather on historical data.

Statistical rating employs data and analytics to determine premiums based on broader risk categories, such as demographics or historical loss data for similar risks. This method uses empirical evidence rather than subjective evaluation by an underwriter, making it less personalized and more generalized compared to judgment rating.

Manual rating utilizes established rates and classifications set forth in a manual, which underwriters apply to determine premiums for various risks. While it provides a structured approach, it is less flexible than judgment rating as it does not involve the nuanced evaluation of individual risks, focusing instead on pre-defined categories and standard rates.