Train GraphicClick on the map to explore geographics
 
I need help
FAQ
Emergency
About .
Travel & transport from BBC stories as at 21:15 28 Mar 2024
* Bus plunges off South Africa bridge, killing 45
- Easter getaways hit by travel disruption
- Where Baltimore bridge investigation goes now
- How do I renew my UK passport and what is the 10-year rule?
- Family anger at sentence on fatal crash driver, 19
- Easter travel warning as millions set to hit roads
Read about the forum [here].
Register [here] - it's free.
What do I gain from registering? [here]
 02/06/24 - Summer Timetable starts
17/08/24 - Bus to Imber
27/09/25 - 200 years of passenger trains

On this day
28th Mar (1917)
Bideford, Westward Ho! and Appledore closed (link)

Train RunningCancelled
18:30 Cardiff Central to Portsmouth Harbour
18:36 London Paddington to Plymouth
19:33 London Paddington to Worcester Shrub Hill
19:35 Exeter St Davids to London Paddington
19:59 Gatwick Airport to Reading
20:29 Gatwick Airport to Reading
20:54 Reading to Gatwick Airport
20:56 Worcester Foregate Street to London Paddington
21:16 Bedwyn to Newbury
21:30 Shalford to Reading
21:53 Newbury to Bedwyn
22:25 Bedwyn to Newbury
22:30 Gatwick Airport to Reading
22:47 Newbury to Bedwyn
Short Run
16:03 London Paddington to Penzance
17:03 London Paddington to Penzance
17:30 London Paddington to Taunton
17:36 London Paddington to Plymouth
18:03 London Paddington to Penzance
19:04 Paignton to London Paddington
20:03 London Paddington to Plymouth
20:11 Salisbury to Bristol Temple Meads
20:42 Bedwyn to London Paddington
21:04 London Paddington to Plymouth
23:04 Reading to Bedwyn
23:17 Bedwyn to Reading
Delayed
16:15 Penzance to London Paddington
Additional 17:26 Castle Cary to Penzance
19:04 London Paddington to Plymouth
21:30 Gatwick Airport to Reading
23:45 London Paddington to Penzance
PollsOpen and recent polls
Closed 2024-03-25 Easter Escape - to where?
Abbreviation pageAcronymns and abbreviations
Stn ComparatorStation Comparator
Rail newsNews Now - live rail news feed
Site Style 1 2 3 4
Next departures • Bristol Temple MeadsBath SpaChippenhamSwindonDidcot ParkwayReadingLondon PaddingtonMelksham
Exeter St DavidsTauntonWestburyTrowbridgeBristol ParkwayCardiff CentralOxfordCheltenham SpaBirmingham New Street
March 28, 2024, 21:32:49 *
Welcome, Guest. Please login or register.

Login with username, password and session length
Forgotten your username or password? - get a reminder
Most recently liked subjects
[104] West Wiltshire Bus Changes April 2024
[103] would you like your own LIVE train station departure board?
[78] Infrastructure problems in Thames Valley causing disruption el...
[56] If not HS2 to Manchester, how will traffic be carried?
[41] Return of the BRUTE?
[25] Reversing Beeching - bring heritage and freight lines into the...
 
News: A forum for passengers ... with input from rail professionals welcomed too
 
   Home   Help Search Calendar Login Register  
Pages: [1]
  Print  
Author Topic: Looking to understand public performance measures  (Read 8725 times)
grahame
Administrator
Hero Member
*****
Posts: 40690



View Profile WWW Email
« on: August 28, 2019, 13:11:44 »

"ppm"s are figures oft quoted as an indicator or performance.   But ...

* what are the targets that GWR (Great Western Railway) are looking to achieve?

* how are they calculated?

* do they include Sundays?

* do they take account when a train's cancelled of the amount of disruption - i.e. if the next train after a cancelled one is in 30 minutes, does this have the same numeric negative as if the next one was 2 hours later, or indeed if it was the last train of the day that is cancelled?

* do they take into account stations skipped in the middle of the journey?

* do they take account of shortformed trains that are overcrowded as a result?

* do they take account of services flagged as "cancelled" but later re-instated?
Logged

Coffee Shop Admin, Acting Chair of Melksham Rail User Group, Option 24/7 Melksham Rep
Adrian
Transport Scholar
Sr. Member
******
Posts: 171


View Profile
« Reply #1 on: August 28, 2019, 19:27:55 »

And do they include services cancelled for part of the journey?

At some future date, isn't there going to be a change to measuring punctuality at every station on a route?  In which case, trains skipping stops or not completing the whole route can't really be disregarded.
Logged
IndustryInsider
Data Manager
Hero Member
******
Posts: 10095


View Profile
« Reply #2 on: August 28, 2019, 19:33:54 »

‘All stops’ figures are now been recorded and published.  I should have a nice graph on the performance thread in a few days...  Smiley

A train that missed stops was always categorised as a ‘part cancellation’.
Logged

To view my GWML (Great Western Main Line) Electrification cab video 'before and after' video comparison, as well as other videos of the new layout at Reading and 'before and after' comparisons of the Cotswold Line Redoubling scheme, see: http://www.dailymotion.com/user/IndustryInsider/
stuving
Transport Scholar
Hero Member
******
Posts: 7156


View Profile
« Reply #3 on: August 28, 2019, 20:22:17 »

For PPM(resolve) and CaSL see the ORR» (Office of Rail and Road formerly Office of Rail Regulation - about)'s "Passenger & Freight Rail Performance: Quality and Methodology Report". ORR publish these figures (and the freight one FDM) for the operators and for Network Rail. ORR assess and report on performance, and where this is poor they usually extract promises to do better (with explanations of how). That may cost the TOC (Train Operating Company) or NR» (Network Rail - home page) money, but only rarely to ORR threaten to demand direct payments.

The DfT» (Department for Transport - about)'s regular incentive payments, as defined in the franchise agreement, use cancellations (including part-route) and minutes lateness. Obviously these are related to PPM and CaSL, but not in an obvious manner. There is similar marking  scheme against benchmarks based on the National Rail Passenger Surveys scores, but that produces amounts of money the TOC has to put into improvements, or into the Customer and Communities Improvement Fund.
Logged
grahame
Administrator
Hero Member
*****
Posts: 40690



View Profile WWW Email
« Reply #4 on: August 29, 2019, 06:15:53 »

For PPM(resolve) and CaSL see the ORR» (Office of Rail and Road formerly Office of Rail Regulation - about)'s "Passenger & Freight Rail Performance: Quality and Methodology Report". ORR publish these figures (and the freight one FDM) for the operators and for Network Rail.

I have read that.    As I understand it - an example of PPM

Take the number of trains scheduled (over the 4 week period)  - say 476 on a sample line.  Cancel 48 of them,  and have a further 42 run 5 or more minutes late - leaving 386 trains running within 5 minutes of schedule. 386 out of 476 is 81% - an 81% PPM.

For PPM MAA (Moving Annual Average) - same thing but over a 52 week period. It can be equally and technically correctly calculated by averaging out the PPMs for 13  4-week periods where the level of service is unchanged for the whole period covered.

So ...
* Sundays ARE included
* A 6 minute delay has the same numeric effect as a cancellation
* No  effect on the numbers from the effect on passengers once at or beyond a 5 minute delay.
Logged

Coffee Shop Admin, Acting Chair of Melksham Rail User Group, Option 24/7 Melksham Rep
Adrian
Transport Scholar
Sr. Member
******
Posts: 171


View Profile
« Reply #5 on: August 29, 2019, 20:31:30 »

If a cancellation and a delay are 'costed' the same way, won't that mean there will sometimes be an even greater incentive for a ToC to turn a train around short of its destination to make up time?  And missing out Weston Super Mare can buy back easily 10 minutes.
Logged
Do you have something you would like to add to this thread, or would you like to raise a new question at the Coffee Shop? Please [register] (it is free) if you have not done so before, or login (at the top of this page) if you already have an account - we would love to read what you have to say!

You can find out more about how this forum works [here] - that will link you to a copy of the forum agreement that you can read before you join, and tell you very much more about how we operate. We are an independent forum, provided and run by customers of Great Western Railway, for customers of Great Western Railway and we welcome railway professionals as members too, in either a personal or official capacity. Views expressed in posts are not necessarily the views of the operators of the forum.

As well as posting messages onto existing threads, and starting new subjects, members can communicate with each other through personal messages if they wish. And once members have made a certain number of posts, they will automatically be admitted to the "frequent posters club", where subjects not-for-public-domain are discussed; anything from the occasional rant to meetups we may be having ...

 
Pages: [1]
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.2 | SMF © 2006-2007, Simple Machines LLC Valid XHTML 1.0! Valid CSS!
This forum is provided by customers of Great Western Railway (formerly First Great Western), and the views expressed are those of the individual posters concerned. Visit www.gwr.com for the official Great Western Railway website. Please contact the administrators of this site if you feel that the content provided by one of our posters contravenes our posting rules (email link to report). Forum hosted by Well House Consultants

Jump to top of pageJump to Forum Home Page