MOM obtains optimized railway timetables, taking into account following constraints:

• Initial departure and/or final arrival times for each train to its start and/or end journey stations.
• Running time for each track section.
• Commercial Stops.
• Headway times.
• Manual / automatic block signalling.
• Priorities among train operators.
• Finite track sections capacity (one-way / two-way tracks).
• Finite capacity in stations (available tracks, tracks with/ without platforms for commercial stops).
• Closing times at stations (for traffic operations or in general) .
• Crossing operations (for single tracks sections).
• Overtaking in stations allowed/forbidden between specific train types/operators.
• Traffic regulations in crossing/overtaking: reception and expedition times.
• Periodic and non-periodic trains. Multiple and variable frequencies for periodic trains.
• Minimum time between simultaneous arrival/departures.
• Delays in running times for unexpected (traffic operations) stops.
• Management of maintenance operations: reduction of allowed tracks, running time increasing due maintenace operations, tec..
• Prescribed timetable for a subset of already scheduled trains.
• Control of circulation days.

These constraints are all the real-world constraints managed by railway operators in order to obtain feasible timetables.

MOM gives the possibility of relaxing some constraints, in such a way that once the railway planner has validated the relaxed constraints, the optimization of the timetable is improved.

Optimization criteria are based on minimizing global journey times, minimizing traffic operations, operator priorities, balance between types of trains and single and return trains.

MOM uses very efficient heuristics and obtains optimized complex timetables, typically with 50-100 trains with journeys across 30-60 stations, in 2 - 5 minutes.