ACROWRX - Scoring Calculation

📢 - INFO

Due to the nature of a web app, ACROWRX had to make modifications to the scoring system in relation to the FAI Fair Play System (FPS). This page explains these modifications.

⚠️ - WARNING

This scoring calculation system cannot be used to classify flights; its only application is to summarize (average) scores submitted by multiple judges for a single flight.

Scoring

Currently, the ACROWRX system allows all users to score any flights they choose. While this is a valuable tool for critique, it presents challenges in terms of statistical analysis. The main issue is the lack of a fixed population of pilots and judges for reliable statistical analysis. Despite this challenge, we have adopted a straightforward system: averaging.

The scores you see for flights are simply the average of all the scores submitted by users for that flight.

Here are some key points:

• Figure scores are averaged among all judges and multiplied by each figure's K factor.
• Positioning/Presentation scores are averaged among all judges and multiplied by the IAC presentation K factor.
• Outs, interruptions, and vertical positioning penalties are only considered if they are applied by the majority of judges.

At the bottom of each completed Form A, the following scores are summarized:

• Figure Score: Sum of all scores multiplied by each figure's K factor.
• Positioning Points: 10 minus the sum of all positioning marks, multiplied by the IAC positioning K factor.
• Penalties: Sum of all penalties. Note that the average penalties are actually the sum of all penalties applied by the majority of judges.
• Total: Figure Score + Positioning Points - Penalties

Presentation/Positioning Penalties

ACROWRX uses CIVA presentation/positioning penalties:

• Each L, R, N, F - 0.5 points penalty
• Each LL, RR, NN, FF - 1.0 points penalty

Total presentation/positioning score is equal to 10 minus the sum of presentation/positioning penalty marks.

ACROWRX uses IAC positioning/presentation K factors:

Category	K Factor
Primary	5K
Sportsman	10K
Intermediate	20K
Advanced	30K
Unlimited	40K

Judge Rank Index

Similar to the FPS system, ACROWRX also classifies the quality of the judge. Due to the open nature of this scoring system, FPS statistical analysis cannot be directly applied, so an alternative solution is used by ACROWRX.

The ACROWRX Rank Index (RI) is a simple but meaningful number. The RI represents, on average, how far a specific judge's scores are from the average score for a specific flight. For example, if a judge has an RI of 1.4, it means that, on average, this judge's scores are 1.4 points off the average score for that flight.

The RI is classified by color as follows:

• Green: RI < 1.0 - Good judge
• Yellow: 1.0 ≤ RI < 2.5 - Judge not reliable
• Red: RI ≥ 2.5 - Judge's scores should not be considered