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 Waitomo Adventures Ltd.

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

Waitomo Adventures Ltd

Valid Reviews

93 Valid Reviews

The Waitomo Adventures Ltd experience has a total of 94 reviews. There are 93 valid reviews that are included when calculating the ranking score and 1 invalid review 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 93 valid reviews:

Rating Count Percentage
10/10 32
34%
9/10 22
24%
8/10 23
25%
7/10 8
9%
6/10 5
5%
5/10 2
2%
4/10 0
0%
3/10 1
1%
2/10 0
0%
1/10 0
0%

86.13% Average

The raw data average (mean) for all the Waitomo Adventures Ltd valid reviews is 86.13% and is based on 93 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

77 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 93 valid reviews, the experience has 77 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 77 face-to-face reviews:

Rating Count Percentage
10/10 23
30%
9/10 20
26%
8/10 20
26%
7/10 8
10%
6/10 3
4%
5/10 2
3%
4/10 0
0%
3/10 1
1%
2/10 0
0%
1/10 0
0%

85.32% Average

The raw data average (mean) for all the Waitomo Adventures Ltd face-to-face reviews is 85.32% and is based on 77 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

91.62%

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 Face-to-Face Weight Relative Weight
Dennis 10/10 443 days true 82.68 100%
Thomas Klinting 10/10 497 days true 73.03 88%
Franz Mesey 9/10 512 days 58.46 70%
Judit Van lanen 10/10 530 days true 66.59 80%
Jack Robinson 8/10 568 days true 58.81 71%
Mikulas and Dominika 8/10 590 days true 54.49 65%
Elizabeth Braidotti 10/10 640 days 37.81 45%
Craig Forsyth 10/10 757 days 23.1 27%
Lea Behnem 10/10 830 days true 19.35 22%
Nicolas Justin 7/10 1174 days true 5.87 6%
Stephanie Piou 8/10 1174 days true 5.87 6%
Alex 9/10 1202 days true 5.82 6%
Devan Sheppard 10/10 1271 days true 5.71 6%
Nina Coopmans 7/10 1883 days true 4.7 5%
Katherine 10/10 1907 days true 4.67 4%
Lieven De Vlaminck 9/10 1913 days true 4.66 4%
Andy 10/10 2004 days 3.75 3%
Ron 9/10 2008 days true 4.5 4%
Bart Slingerland 9/10 2263 days true 4.08 4%
Birds Tubbs 10/10 2264 days true 4.08 4%
Malena 10/10 2279 days 3.38 3%
Schael 10/10 2283 days true 4.05 4%
Ryan Pynappels 9/10 2290 days true 4.04 4%
Tobias Forst 8/10 2371 days true 3.9 4%
Sarah and Soren 9/10 2376 days true 3.89 4%
Alberto Redner 10/10 2386 days true 3.88 4%
Dozza 10/10 2431 days 3.17 3%
Sarah James 10/10 2613 days true 3.5 3%
Nick Taylor 10/10 2613 days true 3.5 3%
Laurent Pouvreau 10/10 2617 days true 3.5 3%
Paap 8/10 2650 days true 3.44 3%
Wouter Jansen 8/10 2650 days true 3.44 3%
Luise Jaeger 3/10 2663 days true 3.17 3%
Steff 9/10 2665 days true 3.42 3%
wannaraft 10/10 2673 days 2.84 2%
elpo 6/10 2918 days 2.5 2%
kempt 8/10 2949 days 2.46 2%
Andy 8/10 3000 days true 2.87 2%
Sam Bishop 10/10 3010 days 2.38 2%
Kay Beaumont 10/10 3012 days true 2.85 2%
Johan 10/10 3020 days true 2.84 2%
Jakob Pedersen 7/10 3020 days true 2.84 2%
Jens van Evp 9/10 3034 days true 2.81 2%
Max Van der Zalm 8/10 3034 days true 2.81 2%
Carolina Gonzalez 8/10 3036 days true 2.81 2%
Kasper 9/10 3036 days true 2.81 2%
Chance McGuire 10/10 3038 days 2.34 2%
katesc 9/10 3089 days true 2.72 2%
rosalindm 9/10 3094 days true 2.71 2%
jennyb 9/10 3098 days true 2.71 2%
Thomas Willi 10/10 3110 days true 2.69 2%
Jess Pasos 10/10 3119 days true 2.67 2%
Nikki Turner 8/10 3265 days true 2.43 2%
Sejna 8/10 3286 days true 2.4 2%
michellew 10/10 3292 days true 2.39 2%
erikholland 8/10 3345 days 1.92 1%
mariea 9/10 3356 days true 2.28 2%
Krapels 9/10 3368 days true 2.26 2%
Halley 5/10 3375 days true 2.25 2%
Katie 10/10 3392 days true 2.22 1%
Ian S 8/10 3393 days true 2.22 1%
Debbie 7/10 3394 days true 2.22 1%
Daniel 8/10 3403 days true 2.21 1%
Kristy825 10/10 3407 days 1.83 1%
Limor 6/10 3415 days true 2.19 1%
Prentner 6/10 3424 days true 2.17 1%
Sonja 9/10 3449 days true 2.13 1%
Bronagh Mcartan 9/10 3592 days true 1.9 1%
Tim 10/10 3616 days true 1.86 1%
Brent Scanlan 10/10 3686 days true 1.74 1%
Meike Biel 10/10 3694 days true 1.73 1%
Hendrik 6/10 3736 days true 1.66 1%
Sabrina 8/10 3736 days true 1.66 1%
Peter Aston 5/10 3736 days true 1.66 1%
helga 9/10 3737 days 1.38 0%
Janne 8/10 3747 days 1.37 0%
Melissa Steedman 9/10 3783 days true 1.58 1%
gemma1 6/10 3788 days 1.31 0%
Francesco 8/10 3818 days true 1.52 1%
Jim&Rachel 9/10 3901 days true 1.39 0%
MarkReid 10/10 4034 days true 1.17 0%
HalRoberts 8/10 4056 days true 1.13 0%
David 9/10 4065 days true 1.12 0%
Justin 8/10 4065 days true 1.12 0%
Alex 8/10 4072 days true 1.11 0%
Hilary 7/10 4081 days true 1.09 0%
Roran 7/10 4091 days true 1.08 0%
Nina 10/10 4116 days true 1.03 0%
Inga 9/10 4116 days true 1.03 0%
Italy 8/10 4116 days true 1.03 0%
Nina 8/10 4116 days true 1.03 0%
Helen 7/10 4116 days true 1.03 0%
JuanPablo 7/10 4133 days true 1.01 0%

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 Waitomo Adventures Ltd experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-3.74% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the Waitomo Adventures Ltd 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 364 days.

The Waitomo Adventures Ltd experience has been adjusted for 187 days. Adjustments are according to the following table.

Days Adjustment
184 -3.68%
185 -3.70%
186 -3.72%
187 -3.74%
188 -3.76%
189 -3.78%
190 -3.80%

Final Ranking Score

88%

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.