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 The Helicopter Line West Coast Glaciers.

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

The Helicopter Line West Coast Glaciers

Valid Reviews

34 Valid Reviews

The The Helicopter Line West Coast Glaciers experience has a total of 34 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 34 valid reviews:

Rating Count Percentage
10/10 13
38%
9/10 10
29%
8/10 6
18%
7/10 5
15%
6/10 0
0%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

89.12% Average

The raw data average (mean) for all the The Helicopter Line West Coast Glaciers valid reviews is 89.12% and is based on 34 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

31 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 34 valid reviews, the experience has 31 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 31 face-to-face reviews:

Rating Count Percentage
10/10 11
35%
9/10 9
29%
8/10 6
19%
7/10 5
16%
6/10 0
0%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

88.39% Average

The raw data average (mean) for all the The Helicopter Line West Coast Glaciers face-to-face reviews is 88.39% and is based on 31 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

97.20%

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
NewZealander 10/10 391 days 100%
Vicki Hoskinson 10/10 728 days 35%
Patricia Trigo 10/10 1580 days 5%
Sarah Jane O'Reilly 9/10 2550 days 3%
Matusala Habtemariam 8/10 2578 days 3%
Anne and Steve Bartlett 10/10 2605 days 3%
Cornelia Stark 10/10 2610 days 3%
D Pieter 8/10 3007 days 2%
Meryem Buchwitz 7/10 3022 days 1%
Margreet Hanemaaijer 9/10 3270 days 1%
Vlutters 10/10 3289 days 1%
B Sluis 9/10 3293 days 1%
Howell Davies 10/10 3293 days 1%
Dean 10/10 3359 days 1%
Andy Johnson 10/10 3641 days 0%
Lars Taarnhoej 7/10 4001 days 1%
gereldineb 9/10 4099 days 1%
Francesca 8/10 4150 days 1%
MiepS 9/10 4337 days 1%
HovingL 7/10 4361 days 1%
NatasjaV 9/10 4367 days 1%
JimmyK 7/10 4367 days 1%
Stefanie 9/10 4374 days 1%
Tatjane 10/10 4396 days 1%
Maureen 10/10 4469 days 1%
Rob and Dorothy 8/10 4719 days 1%
Jennifer Baulch 8/10 4725 days 1%
Kavanagh 8/10 4732 days 1%
Neil 7/10 4740 days 1%
Sara Rütten 9/10 4748 days 1%
Knol 10/10 4750 days 1%
Rebekah Holbrook 9/10 4777 days 1%
Simon Chettleburgh 9/10 4777 days 1%
Rene Schotvanger 10/10 4951 days 1%

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 The Helicopter Line West Coast Glaciers experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-1.65% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 54 days. However the The Helicopter Line West Coast Glaciers 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 The Helicopter Line West Coast Glaciers experience has been adjusted for 80 days. Adjustments are according to the following table.

Days Adjustment
77 -1.59%
78 -1.61%
79 -1.63%
80 -1.65%
81 -1.67%
82 -1.69%
83 -1.71%

Final Ranking Score

96%

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.