Ranking Score Explained

Hi, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.

The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!

We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?

Below you'll find details around some of the important factors that went into calculating the ranking score for Glacier Helicopters.

If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.

Cymen Crick's avatar

Cymen Crick

Rankers Owner

Glacier Helicopters

Valid Reviews

50 Valid Reviews

The Glacier Helicopters experience has a total of 50 valid reviews. There are no invalid reviews that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.

Below is the distribution of ratings for the 50 valid reviews:

Rating Count Percentage
10/10 30
60%
9/10 9
18%
8/10 8
16%
7/10 3
6%
6/10 0
0%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

93.20% Average

The raw data average (mean) for all the Glacier Helicopters valid reviews is 93.20% and is based on 50 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.

Face-to-Face Reviews

43 Face-to-Face Reviews

The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.

More about face-to-face reviews

Within the 50 valid reviews, the experience has 43 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 43 face-to-face reviews:

Rating Count Percentage
10/10 26
60%
9/10 8
19%
8/10 6
14%
7/10 3
7%
6/10 0
0%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

93.26% Average

The raw data average (mean) for all the Glacier Helicopters face-to-face reviews is 93.26% and is based on 43 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

94.23%

Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.

Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.

Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.

Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.

Reviewer Rating Age Relative Weight
Rick Stockdale 10/10 2833 days 100%
Manu Liberta 10/10 2909 days 95%
Faye Kokolakis 10/10 2911 days 95%
Peter Hodgson 10/10 3220 days 73%
Julian Roots 9/10 4282 days 0%
Kali Lohman 8/10 4388 days 28%
Rick Moth 10/10 4656 days 29%
Elaine 10/10 4657 days 29%
Mike & Jennie 9/10 4658 days 28%
Sabine 10/10 4659 days 29%
katel86 8/10 4829 days 28%
Debbie Smithers 10/10 4971 days 29%
Laurent P 10/10 4985 days 29%
Ray Banham 9/10 4993 days 28%
Ian & Phyllis 10/10 5005 days 29%
Geert Van Tittelboom 10/10 5017 days 29%
Irene and Thib Schneider 10/10 5029 days 29%
antrobdozer 10/10 5225 days 29%
Chris el capitan 7/10 5383 days 26%
Amanda Iavarone 10/10 5384 days 29%
Janny Meerdinnk Veldboow 10/10 5384 days 29%
Yvonne Ing 10/10 5405 days 29%
Chance McGuire 10/10 5406 days 29%
E.M. Prideaux 10/10 5420 days 29%
Bartlett nz 10/10 5423 days 29%
joannaw 10/10 5453 days 29%
TomL 10/10 5498 days 29%
marleen451 8/10 5529 days 28%
rogerandchristine 10/10 5597 days 29%
joevw 10/10 5667 days 29%
ElizabethF 9/10 5679 days 28%
Philipp 8/10 5712 days 28%
JasminA 8/10 5712 days 28%
brendar 10/10 5712 days 29%
AstridVG 7/10 5729 days 26%
Vivien Williams 10/10 5730 days 29%
JohannaB 8/10 5731 days 28%
Joery 9/10 5736 days 28%
Debbie 9/10 5736 days 28%
Kevin 10/10 5744 days 29%
ChenM 9/10 5746 days 28%
CollyBob 10/10 5985 days 29%
Rachel 9/10 6078 days 28%
Alison Street 9/10 6111 days 28%
Wanda 10/10 6113 days 29%
Blenkoe 8/10 6117 days 28%
ranker_36 8/10 6314 days 28%
Peter 7/10 6482 days 26%
Peter 10/10 6494 days 29%
Brian 10/10 6494 days 29%

Adjustments

Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.

Sample Size Adjustment

No Adjustment

A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Glacier Helicopters experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.04% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 44 days. However the Glacier Helicopters experience does not meet the criteria for any adjustment.

In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.

The Glacier Helicopters experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -3.98%
198 -4.00%
199 -4.02%
200 -4.04%
201 -4.07%
202 -4.09%
203 -4.11%

Balancing Adjustment

0.97% Adjustment

Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.

You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.

We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.

Final Ranking Score

91%

The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.