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 Caveworld.

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 Caveworld

Valid Reviews

74 Valid Reviews

The Waitomo Caveworld experience has a total of 74 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 74 valid reviews:

Rating Count Percentage
10/10 15
20%
9/10 18
24%
8/10 20
27%
7/10 10
14%
6/10 8
11%
5/10 2
3%
4/10 0
0%
3/10 0
0%
2/10 1
1%
1/10 0
0%

81.35% Average

The raw data average (mean) for all the Waitomo Caveworld valid reviews is 81.35% and is based on 74 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

68 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 74 valid reviews, the experience has 68 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 68 face-to-face reviews:

Rating Count Percentage
10/10 15
22%
9/10 16
24%
8/10 19
28%
7/10 9
13%
6/10 7
10%
5/10 2
3%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

82.50% Average

The raw data average (mean) for all the Waitomo Caveworld face-to-face reviews is 82.50% and is based on 68 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

84.04%

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
Cassandra Geyer 9/10 1703 days true 3.81 100%
Mijke Boesten 8/10 1758 days true 3.52 92%
Anders Hauke 8/10 1759 days true 3.52 92%
Lengxi 8/10 1759 days true 3.52 92%
Arvid Hellquist 9/10 2131 days true 2.97 78%
Steven Lotrian 9/10 2478 days true 2.29 60%
Alex Artigues 10/10 2526 days true 2.2 58%
Serge Garcin 10/10 2526 days true 2.2 58%
Tourist101 2/10 2980 days 0.98 26%
kayburns 9/10 3041 days 1.19 31%
Alison Rosser 7/10 3217 days true 0.77 20%
Helen & Laurence 8/10 3292 days true 0.67 17%
Kris Gijbels 8/10 3538 days true 0.21 5%
Mike 6/10 3576 days true 0.12 3%
Stefan Morris 8/10 3579 days true 0.13 3%
Jessie Currie 7/10 3579 days true 0.13 3%
Barry 9/10 3581 days true 0.14 4%
Melanie Armbruster 6/10 3584 days true 0.11 3%
Stefanie Halbrock 5/10 3584 days true 0.1 3%
Jim Thomsen 8/10 3585 days true 0.12 3%
Kate Thomsen 8/10 3585 days true 0.12 3%
Denecke Thorsten 7/10 3934 days true 0.0 0%
M and H Lunn 8/10 3934 days true 0.0 0%
Henrik Plichta 9/10 3934 days true 0.0 0%
Michael 10/10 3935 days true 0.0 0%
San Ahuia 5/10 3944 days true 0.0 0%
Amer 10/10 3950 days true 0.0 0%
Coby Aalbrecht 7/10 3952 days true 0.0 0%
Andreas Sterki 8/10 4023 days true 0.0 0%
X Otte 7/10 4023 days true 0.0 0%
Hansjoerg Ehrmann 9/10 4026 days true 0.0 0%
Sophie Keate 8/10 4143 days true 0.0 0%
Catherine Smiles 10/10 4173 days true 0.0 0%
Martina 6/10 4259 days 0.0 0%
IanM 8/10 4259 days true 0.0 0%
MarielR 9/10 4277 days true 0.0 0%
Joel 9/10 4279 days true 0.0 0%
Brigette Guikens 10/10 4280 days true 0.0 0%
Keith 7/10 4283 days true 0.0 0%
JuliaG1 8/10 4292 days true 0.0 0%
DavidMurray 8/10 4293 days true 0.0 0%
RosC 6/10 4294 days true 0.0 0%
AndrewF78 9/10 4295 days true 0.0 0%
EmmaB1 9/10 4305 days true 0.0 0%
ClaudiaK 10/10 4308 days true 0.0 0%
ArnarF 9/10 4318 days true 0.0 0%
SonjaS 10/10 4318 days true 0.0 0%
Burkhalter 9/10 4330 days true 0.0 0%
Rene 7/10 4331 days true 0.0 0%
Paula 8/10 4384 days true 0.0 0%
Teresa 10/10 4390 days true 0.0 0%
Kay 10/10 4438 days true 0.0 0%
Jimmy 9/10 4456 days true 0.0 0%
Anna 10/10 4456 days true 0.0 0%
sabine 10/10 4456 days true 0.0 0%
Elisabeth 10/10 4465 days true 0.0 0%
Terneal King 7/10 4497 days 0.0 0%
Helen 6/10 4507 days true 0.0 0%
Nicnac 8/10 4624 days 0.0 0%
Mark 10/10 4629 days true 0.0 0%
Joanne M 7/10 4635 days true 0.0 0%
Anna 10/10 4636 days true 0.0 0%
Leila 9/10 4639 days true 0.0 0%
Adam Richards 8/10 4639 days true 0.0 0%
Lena1 9/10 4659 days 0.0 0%
Stephanie 9/10 4671 days true 0.0 0%
Hanna 6/10 4672 days true 0.0 0%
Maree 8/10 4672 days true 0.0 0%
Orlaith 9/10 4672 days true 0.0 0%
Lisa 8/10 4672 days true 0.0 0%
Stephanie Jones 6/10 4699 days true 0.0 0%
Paula Smith 7/10 4702 days true 0.0 0%
Bridgy 8/10 4949 days true 0.0 0%
JanKovar 6/10 4977 days true 0.0 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 Caveworld experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.07% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 43 days. However the Waitomo Caveworld 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 Waitomo Caveworld experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.01%
198 -4.03%
199 -4.05%
200 -4.07%
201 -4.09%
202 -4.11%
203 -4.13%

Final Ranking Score

80%

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.