Since KPI was introduced into China in 1992, it has been used as one of the main methods of performance appraisal. Its core functions for decomposition of organizational goal, bounding employee behavior, evaluating work effectiveness and distribution achievement are used usually, but its guiding function has been always neglected.So, it brings about numerous questions when designing or implementing KPI. Such as, the employees boycott KPI because they don't know why they are assessed by KPI; Some illegal thi...