Escalões:

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The formula for the calculation of time loss is the following:

TC = Time to Control (leg time between two controls)

BTC = Best Time to Control (best time to a control from all runners in the class)

FTR = Finish Time of the Runner (total running time of the runner)

PCT = Perfect Course Time (total course time summing all the BTC for each leg/control)

TLC = Time Loss to Control

TR (Time Ratio) = FTR / PCT (this sets the level of the runner performance compared to the best times of the course)

To calculate the TLC in each control:

If TC > BTC * TR, then TLC = TC - (BTC * TR)

TTL = Total Time Loss of a runner = sum of all controls TLC for that runner.

After a first calculation of TTL a second calculation of TTL is executed with new value adjusted for TR.

TRA (Time Ratio Adjusted) = (FTR-TTL) / PCT .

Then again to calculate the TLCA (TLC Adjusted) in each control:

If TC > BTC * TRA, then TLCA = TC - (BTC * TRA)

TTLA = Total Time Loss Adjusted of a runner = sum of all controls TLCA for that runner.