IT rojsek management Basic Principles of Cost management (10) ■ reserves(储备金) Contingency reserves(应急储备金) allow for future situations that may be partiall planned for(sometimes called known unknowns)-已知的未知事件 a Management reserves(管理储备金 Allow for future situations that are unpredictable ( sometime called unknown unknowns)-未知的未 知事件 Project Cost Management 20Project Cost Management 20 Basic Principles of Cost Management (10) ◼ Reserves（储备金） ◼ Contingency reserves (应急储备金): ◼ allow for future situations that may be partially planned for (sometimes called known unknowns)-已知的未知事件 ◼ Management reserves (管理储备金): ◼ Allow for future situations that are unpredictable (sometime called unknown unknowns)-未知的未 知事件 IT Project Management