Abstract: Different computing methods for target-location error have much influence on the result of cluster target damage ratio. In order to find a suitable method, based on existing damage ratio analytical method and error combination method, several new ideas, such as error synthesis method, random target method, were proposed. By analyzing specific examples and comparing the results, the accuracy and application conditions for each method were reached. Random target method was proved to be the best on the whole; error combination method was optimal when it could meet the conditions of analytical method and data error combination; target-location error could be ignored when K<K_f. It is a good reference in the research of damage efficiency of target-location error and ammunition consumption.

Key words: target-location error, damage ratio, analytical method, simulation method, error combination