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 Waimangu Volcanic Valley.

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

Waimangu Volcanic Valley

Valid Reviews

143 Valid Reviews

The Waimangu Volcanic Valley experience has a total of 143 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 143 valid reviews:

Rating Count Percentage
10/10 30
21%
9/10 37
26%
8/10 45
31%
7/10 19
13%
6/10 6
4%
5/10 2
1%
4/10 2
1%
3/10 1
1%
2/10 1
1%
1/10 0
0%

82.87% Average

The raw data average (mean) for all the Waimangu Volcanic Valley valid reviews is 82.87% and is based on 143 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

135 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 143 valid reviews, the experience has 135 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 135 face-to-face reviews:

Rating Count Percentage
10/10 29
21%
9/10 35
26%
8/10 43
32%
7/10 17
13%
6/10 6
4%
5/10 2
1%
4/10 2
1%
3/10 0
0%
2/10 1
1%
1/10 0
0%

83.26% Average

The raw data average (mean) for all the Waimangu Volcanic Valley face-to-face reviews is 83.26% and is based on 135 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

74.54%

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
Dave 3/10 725 days 20.55 100%
Rado Hank 8/10 1054 days true 5.0 24%
Matthias and Adriane 9/10 1309 days true 4.58 22%
Laure and Pascal 9/10 1322 days true 4.56 22%
Thomas Klinting 10/10 1348 days true 4.5 22%
Helna Saumanova 9/10 1353 days true 4.5 22%
Danny 7/10 1405 days true 4.0 19%
Marine Lavie 8/10 1667 days true 3.69 18%
Cate Ronke 8/10 1670 days true 3.68 18%
Stephan Friedrich 9/10 1686 days 3.84 19%
Stula Vladimir 10/10 1704 days true 3.81 19%
Isabelle 10/10 1707 days true 3.8 18%
Mikkel Palleson 7/10 1710 days true 3.45 17%
Meilin 5/10 1716 days true 3.07 15%
Sebastian and Susanna 7/10 1755 days true 3.37 16%
Jakob Gerber 7/10 1760 days 3.37 16%
Marie Weber 9/10 2069 days true 3.09 15%
Erik Hafuer 4/10 2103 days true 2.39 12%
Caroline Jonsson 7/10 2368 days true 2.28 11%
Jonny Ronnblom 7/10 2368 days true 2.28 11%
Catherine Schlachter 9/10 2375 days true 2.5 12%
Christina Perez 8/10 2375 days true 2.37 12%
Bea Westkam 10/10 2384 days true 2.48 12%
Julia Moellers 8/10 2384 days true 2.35 11%
Anne Haenchen 8/10 2400 days true 2.32 11%
Kathi 8/10 2400 days true 2.32 11%
Sophia 7/10 2417 days true 2.2 11%
Lukas 6/10 2426 days true 1.99 10%
Celine Darde 8/10 2440 days true 2.25 11%
Ludovic Denee 8/10 2440 days true 2.25 11%
Melanie Pretzel 8/10 2767 days true 1.64 8%
Frederic Birke 8/10 2767 days true 1.64 8%
Andre and Marina 2/10 2798 days true 1.25 6%
Hanneke P 7/10 2824 days 1.47 7%
Joroen Borkert 9/10 2842 days true 1.58 8%
Roux 8/10 2845 days true 1.5 7%
Leo 9/10 2859 days true 1.55 8%
Lutz Huuemorder 8/10 2861 days true 1.47 7%
Henzen 8/10 2864 days true 1.46 7%
Tuedi Muggli 10/10 3127 days true 1.02 5%
Romla 8/10 3137 days true 0.95 5%
Ronald Veldman 8/10 3137 days true 0.95 5%
Richard 8/10 3140 days true 0.95 5%
Marie Dutron 6/10 3140 days true 0.83 4%
Carl & Desiree Potter 9/10 3142 days true 0.99 5%
Frans 10/10 3142 days true 0.99 5%
Preben vil Helmsen 10/10 3142 days true 0.99 5%
Johann Maier 10/10 3143 days true 0.99 5%
Gillian MacLaren 8/10 3144 days true 0.94 5%
Eline Vakentijn 8/10 3144 days true 0.94 5%
Langerak 9/10 3146 days true 0.99 5%
Magda Savels 8/10 3152 days true 0.93 5%
Roger ter Horst 9/10 3154 days true 0.97 5%
Maria Dietrich 9/10 3154 days true 0.97 5%
Samplonius 8/10 3154 days true 0.92 4%
Manuela Zimmerti 9/10 3222 days true 0.84 4%
Dirk Faupel 9/10 3225 days true 0.83 4%
Dirk Faupel 9/10 3225 days true 0.83 4%
Robert Carswell 7/10 3227 days true 0.75 4%
Marc & Pauline 8/10 3227 days true 0.79 4%
Gerard Crothers 10/10 3228 days true 0.83 4%
Steve Eley 7/10 3230 days true 0.75 4%
van Rees 8/10 3230 days true 0.78 4%
Ron & Hannah de Reuver 9/10 3235 days true 0.81 4%
Wolfgang Goggel 9/10 3235 days true 0.81 4%
Gary A 7/10 3251 days true 0.71 3%
Tina 9/10 3251 days true 0.78 4%
Jon_and_Family 8/10 3465 days 0.34 2%
Franzi & Tobi 9/10 3476 days true 0.34 2%
Oliver Berg 7/10 3479 days true 0.3 1%
Marianne Wheatley 10/10 3484 days true 0.32 2%
Krabbe 8/10 3487 days true 0.3 1%
Rolf 4/10 3487 days true 0.25 1%
Malcolm Jones 8/10 3489 days true 0.3 1%
Berger 8/10 3500 days true 0.28 1%
Pieter 9/10 3501 days true 0.29 1%
mr Schumader 9/10 3510 days true 0.27 1%
Tamlin Barton 6/10 3511 days true 0.23 1%
Tim Van Nispen 8/10 3512 days true 0.26 1%
Johanna 6/10 3513 days true 0.22 1%
Eva Stauderova 10/10 3515 days true 0.26 1%
Patrick Decoster 9/10 3517 days true 0.26 1%
Liz Dolman 8/10 3519 days true 0.24 1%
Kay and Colin Yendole 9/10 3520 days true 0.25 1%
Chamton 6/10 3524 days true 0.2 1%
willsworthy 9/10 3616 days 0.07 0%
allesca 8/10 3647 days 0.01 0%
Bergemann 8/10 3847 days true 0.0 0%
Silke Seemann 9/10 3852 days true 0.0 0%
John Harrison 8/10 3868 days true 0.0 0%
Tanja Haring 9/10 3874 days true 0.0 0%
Amanda Hoff 10/10 3889 days 0.0 0%
Beute Jacob 8/10 3902 days true 0.0 0%
Alies van der plank 8/10 3906 days true 0.0 0%
mariekef 10/10 3935 days true 0.0 0%
sanneb1 8/10 3936 days true 0.0 0%
keane 7/10 3936 days true 0.0 0%
mariak 8/10 3937 days true 0.0 0%
usigmund 8/10 3940 days true 0.0 0%
hofstetterf 10/10 3949 days true 0.0 0%
Stefan Lua 10/10 3953 days true 0.0 0%
Peter Essink 9/10 3953 days true 0.0 0%
Wolfgang Mages 10/10 3955 days true 0.0 0%
Ann S 10/10 3959 days true 0.0 0%
Roeder Grit 8/10 3962 days true 0.0 0%
ulrichk 10/10 4068 days true 0.0 0%
gerrys 7/10 4150 days true 0.0 0%
RolandV 10/10 4179 days true 0.0 0%
GemmaC 8/10 4184 days true 0.0 0%
CeesVanW 8/10 4192 days true 0.0 0%
LaurensD 7/10 4195 days true 0.0 0%
StefanieA 10/10 4197 days true 0.0 0%
Hendrik Flier 7/10 4201 days true 0.0 0%
PBouwmessten 9/10 4215 days true 0.0 0%
MauzcoV 9/10 4215 days true 0.0 0%
marcusr 9/10 4236 days true 0.0 0%
Eugene 10/10 4236 days true 0.0 0%
Tony 10/10 4243 days true 0.0 0%
Ian S 9/10 4244 days true 0.0 0%
Miguel 9/10 4246 days true 0.0 0%
Thamar 8/10 4259 days true 0.0 0%
Andie 10/10 4267 days true 0.0 0%
Miranda 8/10 4271 days true 0.0 0%
Miha 10/10 4300 days true 0.0 0%
Gerits 10/10 4308 days true 0.0 0%
Sluijs 10/10 4312 days true 0.0 0%
olland 10/10 4315 days true 0.0 0%
Liz 10/10 4334 days true 0.0 0%
Stefan 9/10 4359 days true 0.0 0%
Cory Fusco 8/10 4419 days true 0.0 0%
Katie Wise 10/10 4427 days true 0.0 0%
Heckter 7/10 4566 days true 0.0 0%
Jennifer Baulch 9/10 4571 days true 0.0 0%
Nancy Dol 7/10 4592 days true 0.0 0%
David Buckley 9/10 4595 days true 0.0 0%
Jenny Hulsebosch 9/10 4623 days true 0.0 0%
Peter 10/10 4664 days true 0.0 0%
bart 6/10 4669 days true 0.0 0%
Miriam&Eva 5/10 4885 days true 0.0 0%
Dennis 8/10 4942 days true 0.0 0%
Arjan 7/10 4956 days true 0.0 0%
Meyer 9/10 4958 days true 0.0 0%
Lucy 8/10 4960 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 Waimangu Volcanic Valley experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-3.16% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 70 days. However the Waimangu Volcanic Valley 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 Waimangu Volcanic Valley experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -3.12%
198 -3.13%
199 -3.15%
200 -3.16%
201 -3.18%
202 -3.19%
203 -3.21%

Final Ranking Score

71%

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.