Fatigue and Risk Index

Fatigue and Risk indexes in Skillo

We calculate the Fatigue Index and Risk Index for each shift.

We use the same algorithm that was in the rr446cal.xls file from Network Rail.

We did not and do not alter the algorithm in any way.

What we send to the algorithm

We send in the same information that you would put in the excel file.

There are 4 parameters for the algorithm describing the shift break pattern.

We did not want to create as much friction in Skillo so we simplified things a bit.

Described below.

🔵 day

• The day the shift starts on

🔵 on duty

• Shift start time

🔵 off duty

• Shift end time

🔵 commuting time

• The total of the departure plus arrival time divided by 2

🔵 breaks frequency

• The total duration of the shift, minus the break, divided by 2.

• If you have a 9 hrs shift with a 1hr break this will be (9 - 1) / 2 = 4.

🔵 breaks average

• The break duration.

🔵 longest work

• The total duration of the shift, minus the break, divided by 2.

• If you have a 9 hrs shift with a 1hr break this will be (9 - 1) / 2 = 4.

🔵 breaks after longest work

• The break duration.

🔵 workload

• One of the following:

  • Extremely demanding, no spare capacity

  • Moderately demanding, little spare capacity

  • Moderately undemanding, some spare capacity

  • Extremely undemanding, lots of spare capacity

🔵 attention frequency

• One of the following:

  • All or nearly all of the time

  • Most of the time

  • Some of the time

  • Rarely or nearly none of the time

For any enquiries or suggestions on this topic please send an email to team@skillo.co.uk.

Thank you!