Information about the Case "TrainCo" is a small train company that owns two trains sets. These trains operate between New York, NY and Schenectady, NY every day. The train schedules are given bellow: Trainco Timetable NYC - Schenectady All days Train no NYC Departure Yonkers Station Arrival Yonkers Station Departure Poughkeepsie Arrival Poughkeepsie Departure Hudson Arrival Hudson Departure Albany Arrival Albany Departure Schenectady Arrival ET-NS-1 6:00 7:12 7:15 8:09 8:12 9:09 9:12 9:46 9:49 10:39 ET-NS-2 16:00 17:12 17:15 18:09 18:12 19:09 19:12 19:46 19:49 20:39 TrainCo Timetable Schenectady-NYC All days Train no Schenectady Departure Albany Arrival Albany Departure Hudson Arrival Hudson Departure Poughkeepsie Arrival Poughkeepsie Departure Yonkers Station Arrival Yonkers Station Departure NYC Arrival ET-SN-1 6:00 6:50 6:53 7:27 7:30 8:27 8:30 9:24 9:27 10:39 ET-SN-2 16:00 16:50 16:53 17:27 17:30 18:27 18:30 19:24 19:27 20:39 There are six train crew teams working in shifts on the two train sets as shown below. TranCo: Train crew table Day Mon Tue Wed Thu Fri Sat Sun Train no Train crew team* NS-1 N1 NS-2 S1 NS-1 NZ NS-2 S2 NS-1 NZ NS-2 SZ NS-1 NZ NS-2 S2 NS-1 N3 NS-2 53 NS-1 N3 NS-2 53 NS-1 N1 NS-2 S1 Train no Train crew team SN-1 G1 SN-2 S1 SN-1 G2 SN-2 S2 SN-1 G2 SN-2 SZ SN-1 G2 SN-2 S2 SN-1 G3 SN-2 53 SN-1 G3 SN-2 53 SN-1 G1 SN-2 Si NYC based teams: N1, NZ, N3 Schenectady based teams: 51, 52, 53 Background of the problem TrainCo has received complaints from its customers about delays. Due to these delays, there has been 20% reduction in the sales of the train tickets as some customers have been switching to competitors. To customers' opinion, more than half of the trains are delayed when arriving at the end station. Also, the customers believe that more than 30% of the trains are departing stations earlier than the scheduled time. Hence, after consulting with the company's experts, the CEO of TrainCo is setting the following objectives for the Six Sigma project team: 1. ARRIVAL TIME: The delay when arriving at the end station (NYC or Schenectady) should not be more than 15 minutes, compared to the time table. Early arrival is acceptable. Required Yield > 90%. 2. DEPARTURE TIME: A train should not depart from any station earlier than given in the time table, nor later than 15 minutes after specified time. Required Yield > 95%. Your role as the Six Sigma team is to understand the root causes of the problems that the train company is facing and improve the situation by reaching the goals that the CEO has set for you. Information about the Case "TrainCo" is a small train company that owns two trains sets. These trains operate between New York, NY and Schenectady, NY every day. The train schedules are given bellow: Trainco Timetable NYC - Schenectady All days Train no NYC Departure Yonkers Station Arrival Yonkers Station Departure Poughkeepsie Arrival Poughkeepsie Departure Hudson Arrival Hudson Departure Albany Arrival Albany Departure Schenectady Arrival ET-NS-1 6:00 7:12 7:15 8:09 8:12 9:09 9:12 9:46 9:49 10:39 ET-NS-2 16:00 17:12 17:15 18:09 18:12 19:09 19:12 19:46 19:49 20:39 TrainCo Timetable Schenectady-NYC All days Train no Schenectady Departure Albany Arrival Albany Departure Hudson Arrival Hudson Departure Poughkeepsie Arrival Poughkeepsie Departure Yonkers Station Arrival Yonkers Station Departure NYC Arrival ET-SN-1 6:00 6:50 6:53 7:27 7:30 8:27 8:30 9:24 9:27 10:39 ET-SN-2 16:00 16:50 16:53 17:27 17:30 18:27 18:30 19:24 19:27 20:39 There are six train crew teams working in shifts on the two train sets as shown below. TranCo: Train crew table Day Mon Tue Wed Thu Fri Sat Sun Train no Train crew team* NS-1 N1 NS-2 S1 NS-1 NZ NS-2 S2 NS-1 NZ NS-2 SZ NS-1 NZ NS-2 S2 NS-1 N3 NS-2 53 NS-1 N3 NS-2 53 NS-1 N1 NS-2 S1 Train no Train crew team SN-1 G1 SN-2 S1 SN-1 G2 SN-2 S2 SN-1 G2 SN-2 SZ SN-1 G2 SN-2 S2 SN-1 G3 SN-2 53 SN-1 G3 SN-2 53 SN-1 G1 SN-2 Si NYC based teams: N1, NZ, N3 Schenectady based teams: 51, 52, 53 Background of the problem TrainCo has received complaints from its customers about delays. Due to these delays, there has been 20% reduction in the sales of the train tickets as some customers have been switching to competitors. To customers' opinion, more than half of the trains are delayed when arriving at the end station. Also, the customers believe that more than 30% of the trains are departing stations earlier than the scheduled time. Hence, after consulting with the company's experts, the CEO of TrainCo is setting the following objectives for the Six Sigma project team: 1. ARRIVAL TIME: The delay when arriving at the end station (NYC or Schenectady) should not be more than 15 minutes, compared to the time table. Early arrival is acceptable. Required Yield > 90%. 2. DEPARTURE TIME: A train should not depart from any station earlier than given in the time table, nor later than 15 minutes after specified time. Required Yield > 95%. Your role as the Six Sigma team is to understand the root causes of the problems that the train company is facing and improve the situation by reaching the goals that the CEO has set for you