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

90.33%

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 10/10 709 days true 34.33 100%
Thomas Klinting 10/10 763 days true 26.96 78%
Franz Mesey 9/10 777 days 21.02 61%
Judit Van lanen 10/10 796 days true 23.0 66%
Jack Robinson 8/10 834 days true 18.95 54%
Mikulas and Dominika 8/10 856 days true 16.86 48%
Elizabeth Braidotti 10/10 905 days 10.72 30%
Craig Forsyth 10/10 1022 days 5.84 16%
Lea Behnem 10/10 1096 days true 6.0 16%
Nicolas Justin 7/10 1440 days true 5.43 14%
Stephanie Piou 8/10 1440 days true 5.43 14%
Alex 9/10 1468 days true 5.39 14%
Devan Sheppard 10/10 1537 days true 5.27 14%
Nina Coopmans 7/10 2149 days true 4.27 11%
Katherine 10/10 2173 days true 4.23 11%
Lieven De Vlaminck 9/10 2179 days true 4.22 11%
Andy 10/10 2270 days 3.39 8%
Ron 9/10 2274 days true 4.06 10%
Bart Slingerland 9/10 2529 days true 3.64 9%
Birds Tubbs 10/10 2530 days true 3.64 9%
Malena 10/10 2545 days 3.01 7%
Schael 10/10 2549 days true 3.61 9%
Ryan Pynappels 9/10 2556 days true 3.6 9%
Tobias Forst 8/10 2637 days true 3.47 9%
Sarah and Soren 9/10 2642 days true 3.46 9%
Alberto Redner 10/10 2652 days true 3.44 9%
Dozza 10/10 2697 days 2.81 7%
Sarah James 10/10 2879 days true 3.07 7%
Nick Taylor 10/10 2879 days true 3.07 7%
Laurent Pouvreau 10/10 2883 days true 3.06 7%
Paap 8/10 2916 days true 3.01 7%
Wouter Jansen 8/10 2916 days true 3.01 7%
Luise Jaeger 3/10 2929 days true 2.76 6%
Steff 9/10 2931 days true 2.98 7%
wannaraft 10/10 2939 days 2.47 6%
elpo 6/10 3183 days 2.14 5%
kempt 8/10 3214 days 2.1 5%
Andy 8/10 3266 days true 2.43 6%
Sam Bishop 10/10 3276 days 2.01 4%
Kay Beaumont 10/10 3278 days true 2.41 5%
Johan 10/10 3286 days true 2.4 5%
Jakob Pedersen 7/10 3286 days true 2.4 5%
Jens van Evp 9/10 3300 days true 2.38 5%
Max Van der Zalm 8/10 3300 days true 2.38 5%
Carolina Gonzalez 8/10 3302 days true 2.37 5%
Kasper 9/10 3302 days true 2.37 5%
Chance McGuire 10/10 3304 days 1.97 4%
katesc 9/10 3355 days true 2.28 5%
rosalindm 9/10 3360 days true 2.28 5%
jennyb 9/10 3364 days true 2.27 5%
Thomas Willi 10/10 3376 days true 2.25 5%
Jess Pasos 10/10 3385 days true 2.24 5%
Nikki Turner 8/10 3530 days true 2.0 4%
Sejna 8/10 3551 days true 1.96 4%
michellew 10/10 3557 days true 1.95 4%
erikholland 8/10 3610 days 1.55 3%
mariea 9/10 3621 days true 1.85 4%
Krapels 9/10 3634 days true 1.83 4%
Halley 5/10 3640 days true 1.82 4%
Katie 10/10 3658 days true 1.79 4%
Ian S 8/10 3659 days true 1.79 4%
Debbie 7/10 3660 days true 1.78 4%
Daniel 8/10 3669 days true 1.77 4%
Kristy825 10/10 3672 days 1.47 3%
Limor 6/10 3681 days true 1.75 3%
Prentner 6/10 3690 days true 1.73 3%
Sonja 9/10 3714 days true 1.69 3%
Bronagh Mcartan 9/10 3858 days true 1.46 3%
Tim 10/10 3882 days true 1.42 3%
Brent Scanlan 10/10 3951 days true 1.31 2%
Meike Biel 10/10 3959 days true 1.29 2%
Hendrik 6/10 4002 days true 1.22 2%
Sabrina 8/10 4002 days true 1.22 2%
Peter Aston 5/10 4002 days true 1.22 2%
helga 9/10 4003 days 1.02 1%
Janne 8/10 4013 days 1.0 1%
Melissa Steedman 9/10 4049 days true 1.14 2%
gemma1 6/10 4053 days 0.95 1%
Francesco 8/10 4084 days true 1.09 2%
Jim&Rachel 9/10 4166 days true 0.95 1%
MarkReid 10/10 4299 days true 0.73 0%
HalRoberts 8/10 4321 days true 0.7 0%
David 9/10 4330 days true 0.68 0%
Justin 8/10 4330 days true 0.68 0%
Alex 8/10 4337 days true 0.67 0%
Hilary 7/10 4346 days true 0.66 0%
Roran 7/10 4357 days true 0.64 0%
Nina 10/10 4382 days true 0.6 0%
Inga 9/10 4382 days true 0.6 0%
Italy 8/10 4382 days true 0.6 0%
Nina 8/10 4382 days true 0.6 0%
Helen 7/10 4382 days true 0.6 0%
JuanPablo 7/10 4399 days true 0.57 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

-7.28% 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 364 days. Adjustments are according to the following table.

Days Adjustment
361 -7.22%
362 -7.24%
363 -7.26%
364 -7.28%
365 -7.30%
366 -7.32%
367 -7.34%

Final Ranking Score

83%

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.