企业要建立高效的考勤管理所面临的挑战包括：灵活合理的排班计划，劳动力成本的有效控制，实时的考勤数据审核和分析。
The challenges of attendance tracking management include the need for flexible shift or roster plans, control of labor costs and real-time attendance monitoring and analysis.
准备好排班，做好公众假期计划。
Prepare duty rosters, and implementvacation and public holiday schedules.
航班频率是航空公司航班计划的核心内容，也是飞机指派及机组排班等运行计划的基础。
The object airlines market share model is found based on flight frequency, average price and fleet coefficient.
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