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

73.76%

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 3/10 682 days 24.66 100%
Rado Hank 8/10 1011 days true 5.81 24%
Matthias and Adriane 9/10 1266 days true 4.67 19%
Laure and Pascal 9/10 1279 days true 4.64 19%
Thomas Klinting 10/10 1305 days true 4.59 19%
Helna Saumanova 9/10 1310 days true 4.58 19%
Danny 7/10 1362 days true 4.07 17%
Marine Lavie 8/10 1624 days true 3.77 15%
Cate Ronke 8/10 1627 days true 3.76 15%
Stephan Friedrich 9/10 1643 days 3.93 16%
Stula Vladimir 10/10 1661 days true 3.89 16%
Isabelle 10/10 1664 days true 3.89 16%
Mikkel Palleson 7/10 1667 days true 3.53 14%
Meilin 5/10 1673 days true 3.13 13%
Sebastian and Susanna 7/10 1712 days true 3.45 14%
Jakob Gerber 7/10 1717 days 3.44 14%
Marie Weber 9/10 2026 days true 3.18 13%
Erik Hafuer 4/10 2060 days true 2.46 10%
Caroline Jonsson 7/10 2325 days true 2.36 10%
Jonny Ronnblom 7/10 2325 days true 2.36 10%
Catherine Schlachter 9/10 2332 days true 2.58 10%
Christina Perez 8/10 2332 days true 2.45 10%
Bea Westkam 10/10 2341 days true 2.56 10%
Julia Moellers 8/10 2341 days true 2.43 10%
Anne Haenchen 8/10 2357 days true 2.4 10%
Kathi 8/10 2357 days true 2.4 10%
Sophia 7/10 2374 days true 2.27 9%
Lukas 6/10 2383 days true 2.06 8%
Celine Darde 8/10 2397 days true 2.33 9%
Ludovic Denee 8/10 2397 days true 2.33 9%
Melanie Pretzel 8/10 2724 days true 1.72 7%
Frederic Birke 8/10 2724 days true 1.72 7%
Andre and Marina 2/10 2755 days true 1.31 5%
Hanneke P 7/10 2781 days 1.55 6%
Joroen Borkert 9/10 2799 days true 1.67 7%
Roux 8/10 2802 days true 1.58 6%
Leo 9/10 2816 days true 1.63 7%
Lutz Huuemorder 8/10 2818 days true 1.55 6%
Henzen 8/10 2821 days true 1.54 6%
Tuedi Muggli 10/10 3084 days true 1.11 4%
Romla 8/10 3094 days true 1.03 4%
Ronald Veldman 8/10 3094 days true 1.03 4%
Richard 8/10 3097 days true 1.03 4%
Marie Dutron 6/10 3097 days true 0.9 4%
Carl & Desiree Potter 9/10 3099 days true 1.08 4%
Frans 10/10 3099 days true 1.08 4%
Preben vil Helmsen 10/10 3099 days true 1.08 4%
Johann Maier 10/10 3100 days true 1.08 4%
Gillian MacLaren 8/10 3101 days true 1.02 4%
Eline Vakentijn 8/10 3101 days true 1.02 4%
Langerak 9/10 3103 days true 1.07 4%
Magda Savels 8/10 3109 days true 1.01 4%
Roger ter Horst 9/10 3111 days true 1.05 4%
Maria Dietrich 9/10 3111 days true 1.05 4%
Samplonius 8/10 3111 days true 1.0 4%
Manuela Zimmerti 9/10 3179 days true 0.92 4%
Dirk Faupel 9/10 3182 days true 0.92 4%
Dirk Faupel 9/10 3182 days true 0.92 4%
Robert Carswell 7/10 3184 days true 0.83 3%
Marc & Pauline 8/10 3184 days true 0.87 4%
Gerard Crothers 10/10 3185 days true 0.91 4%
Steve Eley 7/10 3187 days true 0.82 3%
van Rees 8/10 3187 days true 0.86 3%
Ron & Hannah de Reuver 9/10 3192 days true 0.9 4%
Wolfgang Goggel 9/10 3192 days true 0.9 4%
Gary A 7/10 3208 days true 0.79 3%
Tina 9/10 3208 days true 0.86 4%
Jon_and_Family 8/10 3422 days 0.42 2%
Franzi & Tobi 9/10 3433 days true 0.42 2%
Oliver Berg 7/10 3436 days true 0.38 2%
Marianne Wheatley 10/10 3441 days true 0.41 2%
Krabbe 8/10 3444 days true 0.38 2%
Rolf 4/10 3444 days true 0.32 1%
Malcolm Jones 8/10 3446 days true 0.38 2%
Berger 8/10 3457 days true 0.36 1%
Pieter 9/10 3458 days true 0.38 2%
mr Schumader 9/10 3467 days true 0.36 1%
Tamlin Barton 6/10 3468 days true 0.3 1%
Tim Van Nispen 8/10 3469 days true 0.34 1%
Johanna 6/10 3470 days true 0.29 1%
Eva Stauderova 10/10 3472 days true 0.35 1%
Patrick Decoster 9/10 3474 days true 0.34 1%
Liz Dolman 8/10 3476 days true 0.32 1%
Kay and Colin Yendole 9/10 3477 days true 0.34 1%
Chamton 6/10 3481 days true 0.27 1%
willsworthy 9/10 3573 days 0.15 1%
allesca 8/10 3604 days 0.09 0%
Bergemann 8/10 3804 days true 0.0 0%
Silke Seemann 9/10 3809 days true 0.0 0%
John Harrison 8/10 3825 days true 0.0 0%
Tanja Haring 9/10 3831 days true 0.0 0%
Amanda Hoff 10/10 3846 days 0.0 0%
Beute Jacob 8/10 3859 days true 0.0 0%
Alies van der plank 8/10 3863 days true 0.0 0%
mariekef 10/10 3892 days true 0.0 0%
sanneb1 8/10 3893 days true 0.0 0%
keane 7/10 3893 days true 0.0 0%
mariak 8/10 3894 days true 0.0 0%
usigmund 8/10 3897 days true 0.0 0%
hofstetterf 10/10 3906 days true 0.0 0%
Stefan Lua 10/10 3910 days true 0.0 0%
Peter Essink 9/10 3910 days true 0.0 0%
Wolfgang Mages 10/10 3912 days true 0.0 0%
Ann S 10/10 3916 days true 0.0 0%
Roeder Grit 8/10 3919 days true 0.0 0%
ulrichk 10/10 4025 days true 0.0 0%
gerrys 7/10 4107 days true 0.0 0%
RolandV 10/10 4136 days true 0.0 0%
GemmaC 8/10 4141 days true 0.0 0%
CeesVanW 8/10 4149 days true 0.0 0%
LaurensD 7/10 4152 days true 0.0 0%
StefanieA 10/10 4154 days true 0.0 0%
Hendrik Flier 7/10 4158 days true 0.0 0%
PBouwmessten 9/10 4172 days true 0.0 0%
MauzcoV 9/10 4172 days true 0.0 0%
marcusr 9/10 4194 days true 0.0 0%
Eugene 10/10 4194 days true 0.0 0%
Tony 10/10 4201 days true 0.0 0%
Ian S 9/10 4202 days true 0.0 0%
Miguel 9/10 4203 days true 0.0 0%
Thamar 8/10 4217 days true 0.0 0%
Andie 10/10 4224 days true 0.0 0%
Miranda 8/10 4229 days true 0.0 0%
Miha 10/10 4257 days true 0.0 0%
Gerits 10/10 4265 days true 0.0 0%
Sluijs 10/10 4269 days true 0.0 0%
olland 10/10 4273 days true 0.0 0%
Liz 10/10 4292 days true 0.0 0%
Stefan 9/10 4316 days true 0.0 0%
Cory Fusco 8/10 4377 days true 0.0 0%
Katie Wise 10/10 4385 days true 0.0 0%
Heckter 7/10 4523 days true 0.0 0%
Jennifer Baulch 9/10 4528 days true 0.0 0%
Nancy Dol 7/10 4549 days true 0.0 0%
David Buckley 9/10 4552 days true 0.0 0%
Jenny Hulsebosch 9/10 4580 days true 0.0 0%
Peter 10/10 4621 days true 0.0 0%
bart 6/10 4626 days true 0.0 0%
Miriam&Eva 5/10 4842 days true 0.0 0%
Dennis 8/10 4899 days true 0.0 0%
Arjan 7/10 4913 days true 0.0 0%
Meyer 9/10 4915 days true 0.0 0%
Lucy 8/10 4917 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

-2.28% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 115 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 -2.24%
198 -2.26%
199 -2.27%
200 -2.28%
201 -2.29%
202 -2.30%
203 -2.31%

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.