Route performance - reliability and punctuality
The following indicators have been developed in relation to punctuality and reliability, with the required data shown in italics below. These indicators should be presented for the route(s) in question and the average for selected comparable routes (e.g., on the Clyde and Hebrides network, the route comparison could be based on other ‘Major vessel’ and ‘Small vessel’ routes as defined by CFL or geographic groupings of routes). For each indicator, the data should be presented in the CNA, accompanied by an explanatory narrative and statement of any major operational or supply-side changes which may impact upon it. For example, on the Stornoway – Ullapool route, cancellations reduced significantly when MV Loch Seaforth commenced operation of the overnight freight service.
- How has punctuality and reliability changed over time?
- 10-year time series showing annual proportion of scheduled sailings:
- Diverted, where appropriate.
- Level 1 lateness (definition varies by route length).
- Level 2 lateness (definition varies by route length).
- How does reliability and punctuality vary across the year?
- Monthly operator performance statistics, for the most recent year (unless that year is an obvious outlier) split by:
- Diverted, where appropriate.
- Level 1 lateness (definition varies by route length).
- Level 2 lateness (definition varies by route length).
- Why are sailings cancelled?
- 10-year time series showing reasons for cancellation.
- Is the impact of weather increasing?
- 10-year time series showing proportion of sailings cancelled due to adverse weather.
- Why are sailings delayed?
- 10-year time series showing reasons for delay.
- How many days per month does the ‘normal’ timetable operate?
- For the most recent year, analyse performance data to identify how many days across the year the published timetable has been operated to schedule.
- Monthly operator performance statistics, for the most recent year (unless that year is an obvious outlier) split by:
- 10-year time series showing annual proportion of scheduled sailings:
The above indicators can be used to inform a narrative around route performance and the factors which contribute towards cancellations and late running, e.g., deployment of a particular vessel or delayed turnarounds in peak summer etc.