Three contingency factors in planning include a manager's level in the organization.
计划过程存在着三种权变因素，包括管理者所处的组织层次。
2
Accidents have characteristics of contingency, inevitability and preventability. Fully realization of these characteristics is of great significance in raising the level of safety awareness.
Early warning system of unemployment include: the warning level of unemployment, early warning signal systems of unemployment, contingency plans for the unemployed and the committee of Experts.