Ranking Score Explained

Hi there, 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.

Nick Morrison's avatar

Nick Morrison

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

94.47%

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 1677 days 100%
Manu Liberta 10/10 1753 days 96%
Faye Kokolakis 10/10 1755 days 96%
Peter Hodgson 10/10 2064 days 79%
Julian Roots 9/10 3126 days 21%
Kali Lohman 8/10 3232 days 14%
Rick Moth 10/10 3500 days 0%
Elaine 10/10 3501 days 0%
Mike & Jennie 9/10 3502 days 0%
Sabine 10/10 3503 days 0%
katel86 8/10 3673 days 19%
Debbie Smithers 10/10 3815 days 20%
Laurent Pouvreau 10/10 3829 days 20%
Ray Banham 9/10 3837 days 20%
Ian & Phyllis 10/10 3849 days 20%
Geert Van Tittelboom 10/10 3861 days 20%
Irene and Thib Schneider 10/10 3873 days 20%
antrobdozer 10/10 4069 days 20%
Chris el capitan 7/10 4227 days 17%
Amanda Iavarone 10/10 4228 days 20%
Janny Meerdinnk Veldboow 10/10 4228 days 20%
Yvonne Ing 10/10 4249 days 20%
Chance McGuire 10/10 4250 days 20%
E.M. Prideaux 10/10 4264 days 20%
Bartlett nz 10/10 4267 days 20%
joannaw 10/10 4297 days 20%
TomL 10/10 4342 days 20%
marleen451 8/10 4373 days 19%
rogerandchristine 10/10 4441 days 20%
joevw 10/10 4511 days 20%
ElizabethF 9/10 4523 days 20%
Philipp 8/10 4556 days 19%
JasminA 8/10 4556 days 19%
brendar 10/10 4556 days 20%
AstridVG 7/10 4573 days 17%
Vivien Williams 10/10 4574 days 20%
JohannaB 8/10 4575 days 19%
Joery 9/10 4580 days 20%
Debbie 9/10 4580 days 20%
Kevin 10/10 4588 days 20%
ChenM 9/10 4590 days 20%
CollyBob 10/10 4829 days 20%
Rachel 9/10 4922 days 20%
Alison Street 9/10 4955 days 20%
Wanda 10/10 4957 days 20%
Blenkoe 8/10 4961 days 19%
ranker_36 8/10 5158 days 19%
Peter 7/10 5326 days 17%
Peter 10/10 5338 days 20%
Brian 10/10 5338 days 20%

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

-3.05% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 74 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 -3.01%
198 -3.02%
199 -3.04%
200 -3.05%
201 -3.07%
202 -3.08%
203 -3.10%

Final Ranking Score

91%

The final ranking score once adjustments and rounding has been applied. This value is cached and recalculated each day. Therefore it may not be precisely accurate based on the other values presented.

If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz.