Systems and methods for quality analysis of a source code are disclosed. The method includes obtaining plural comments included in the source code. Each of the plural comments includes at least one of plural predetermined words. Also the method extracts plural candidate comments which are comments obtained by excluding plural specific comments from the obtained plural comments. Each of the plural specific comments can be identified using a similarity between a source code fragment relating to any of the obtained plural comments and an adjacent source code fragment adjacent to the source code fragment. In addition, the method outputs an evaluation about incompletion of the source code. The evaluation is determined using the plural candidate comments.