案例库 · 工程与运营 · 技术决策 · 2006–2008
这条还没译成中文，下面是英文原文。
Netherlands Railways rebuilt its timetable with OR and hit a record 87% punctuality
NS designed a new cyclic timetable with OR tools (CADANS, STATIONS, ROSA, TURNI), lifting on-time arrivals from 84.8% to 87.0% and adding €40M annual profit.
Nederlandse Spoorwegen (Netherlands Railways)
那一手
The Dutch timetable had not been redesigned since 1970, while passenger traffic grew from 8.0 billion to 15.4 billion passenger-kilometers by 2006. NS added more and longer trains to the old structure, but the system became overloaded and reliability fell, even as a sector report estimated new infrastructure would cost an extra €10 billion through 2020.
Operations researchers built the new timetable with four OR tools: CADANS constructs a one-hour cyclic timetable, STATIONS assigns platforms and routings, ROSA plans rolling stock circulation, and TURNI schedules drivers and conductors. The new timetable launched on December 10, 2006, replacing the 1970 structure entirely.
On-time performance — trains arriving within three minutes — rose from 84.8% in 2006 to an all-time high of 87.0% in 2007, passenger numbers grew 2% in the first half of 2007, and lines with the biggest improvements gained almost 15% more demand. The 2008 Edelman book adds that the timetable delivered an extra €40 million in annual profit in 2007, expected to reach €70 million.
为什么管用
- Designing the whole timetable as one cyclic optimization makes connections robust by construction instead of patching delays.
- Coordinating timetable, platforms, rolling stock and crews avoids conflicts that manual planning would leave hidden.
- A robust timetable raises capacity without new infrastructure, avoiding billions in investment.
可以搬走什么
When a legacy system is the constraint, redesign the whole structure once with optimization rather than patching it — the math investment replaces billions in physical investment.
后来呢
The 2007 timetable reversed years of declining reliability: punctuality hit a record 87.0%, demand rose, and NS estimated the design added €40 million in annual profit in 2007 with €70 million expected later. INFORMS gave Netherlands Railways the 2008 Franz Edelman Award, calling the redesign 'The O.R. Revolution.'
资料来源
- European Mass Transit Improvements Win INFORMS Edelman Prize for Netherlands Railways
- The New Dutch Timetable: The OR Revolution (extended abstract, Dagstuhl Seminar Proceedings)
- 2008 Franz Edelman Award Book — Netherlands Railways: The new Dutch timetable: the O.R. Revolution
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