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.

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Cymen Crick

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

82.75%

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 Relative Weight
Dave 3/10 1330 days 94%
Rado Hank 8/10 1659 days 100%
Matthias and Adriane 9/10 1914 days 91%
Laure and Pascal 9/10 1927 days 90%
Thomas Klinting 10/10 1953 days 89%
Helna Saumanova 9/10 1958 days 88%
Danny 7/10 2010 days 77%
Marine Lavie 8/10 2272 days 66%
Cate Ronke 8/10 2275 days 66%
Stephan Friedrich 9/10 2291 days 69%
Stula Vladimir 10/10 2309 days 68%
Isabelle 10/10 2312 days 68%
Mikkel Palleson 7/10 2315 days 61%
Meilin 5/10 2321 days 53%
Sebastian and Susanna 7/10 2360 days 58%
Jakob Gerber 7/10 2365 days 58%
Marie Weber 9/10 2674 days 47%
Erik Hafuer 4/10 2708 days 33%
Caroline Jonsson 7/10 2973 days 26%
Jonny Ronnblom 7/10 2973 days 26%
Catherine Schlachter 9/10 2980 days 29%
Christina Perez 8/10 2980 days 27%
Bea Westkam 10/10 2989 days 28%
Julia Moellers 8/10 2989 days 27%
Anne Haenchen 8/10 3005 days 26%
Kathi 8/10 3005 days 26%
Sophia 7/10 3022 days 23%
Lukas 6/10 3031 days 20%
Celine Darde 8/10 3045 days 23%
Ludovic Denee 8/10 3045 days 23%
Melanie Pretzel 8/10 3372 days 5%
Frederic Birke 8/10 3372 days 5%
Andre and Marina 2/10 3403 days 1%
Hanneke P 7/10 3429 days 2%
Joroen Borkert 9/10 3447 days 2%
Roux 8/10 3450 days 1%
Leo 9/10 3464 days 1%
Lutz Huuemorder 8/10 3466 days 0%
Henzen 8/10 3469 days 0%
Tuedi Muggli 10/10 3732 days 20%
Romla 8/10 3742 days 18%
Ronald Veldman 8/10 3742 days 18%
Richard 8/10 3745 days 18%
Marie Dutron 6/10 3745 days 15%
Carl & Desiree Potter 9/10 3747 days 20%
Frans 10/10 3747 days 20%
Preben vil Helmsen 10/10 3747 days 20%
Johann Maier 10/10 3748 days 20%
Gillian MacLaren 8/10 3749 days 18%
Eline Vakentijn 8/10 3749 days 18%
Langerak 9/10 3751 days 20%
Magda Savels 8/10 3757 days 18%
Roger ter Horst 9/10 3759 days 20%
Maria Dietrich 9/10 3759 days 20%
Samplonius 8/10 3759 days 18%
Manuela Zimmerti 9/10 3827 days 20%
Dirk Faupel 9/10 3830 days 20%
Dirk Faupel 9/10 3830 days 20%
Robert Carswell 7/10 3832 days 17%
Marc & Pauline 8/10 3832 days 18%
Gerard Crothers 10/10 3833 days 20%
Steve Eley 7/10 3835 days 17%
van Rees 8/10 3835 days 18%
Ron & Hannah de Reuver 9/10 3840 days 20%
Wolfgang Goggel 9/10 3840 days 20%
Gary A 7/10 3856 days 17%
Tina 9/10 3856 days 20%
Jon_and_Family 8/10 4070 days 18%
Franzi & Tobi 9/10 4081 days 20%
Oliver Berg 7/10 4084 days 17%
Marianne Wheatley 10/10 4089 days 20%
Krabbe 8/10 4092 days 18%
Rolf 4/10 4092 days 13%
Malcolm Jones 8/10 4094 days 18%
Berger 8/10 4105 days 18%
Pieter 9/10 4106 days 20%
mr Schumader 9/10 4115 days 20%
Tamlin Barton 6/10 4116 days 15%
Tim Van Nispen 8/10 4117 days 18%
Johanna 6/10 4118 days 15%
Eva Stauderova 10/10 4120 days 20%
Patrick Decoster 9/10 4122 days 20%
Liz Dolman 8/10 4124 days 18%
Kay and Colin Yendole 9/10 4125 days 20%
Chamton 6/10 4129 days 15%
willsworthy 9/10 4221 days 20%
allesca 8/10 4252 days 18%
Bergemann 8/10 4452 days 18%
Silke Seemann 9/10 4457 days 20%
John Harrison 8/10 4473 days 18%
Tanja Haring 9/10 4479 days 20%
Amanda Hoff 10/10 4494 days 20%
Beute Jacob 8/10 4507 days 18%
Alies van der plank 8/10 4511 days 18%
mariekef 10/10 4540 days 20%
sanneb1 8/10 4541 days 18%
keane 7/10 4541 days 17%
mariak 8/10 4542 days 18%
usigmund 8/10 4545 days 18%
hofstetterf 10/10 4554 days 20%
Stefan Lua 10/10 4558 days 20%
Peter Essink 9/10 4558 days 20%
Wolfgang Mages 10/10 4560 days 20%
Ann S 10/10 4564 days 20%
Roeder Grit 8/10 4567 days 18%
ulrichk 10/10 4673 days 20%
gerrys 7/10 4755 days 17%
RolandV 10/10 4784 days 20%
GemmaC 8/10 4789 days 18%
CeesVanW 8/10 4797 days 18%
LaurensD 7/10 4800 days 17%
StefanieA 10/10 4802 days 20%
Hendrik Flier 7/10 4806 days 17%
PBouwmessten 9/10 4820 days 20%
MauzcoV 9/10 4820 days 20%
marcusr 9/10 4842 days 20%
Eugene 10/10 4842 days 20%
Tony 10/10 4848 days 20%
Ian S 9/10 4849 days 20%
Miguel 9/10 4851 days 20%
Thamar 8/10 4865 days 18%
Andie 10/10 4872 days 20%
Miranda 8/10 4877 days 18%
Miha 10/10 4905 days 20%
Gerits 10/10 4913 days 20%
Sluijs 10/10 4917 days 20%
olland 10/10 4921 days 20%
Liz 10/10 4940 days 20%
Stefan 9/10 4964 days 20%
Cory Fusco 8/10 5025 days 18%
Katie Wise 10/10 5033 days 20%
Heckter 7/10 5171 days 17%
Jennifer Baulch 9/10 5176 days 20%
Nancy Dol 7/10 5197 days 17%
David Buckley 9/10 5200 days 20%
Jenny Hulsebosch 9/10 5228 days 20%
Peter 10/10 5269 days 20%
bart 6/10 5274 days 15%
Miriam&Eva 5/10 5490 days 14%
Dennis 8/10 5547 days 18%
Arjan 7/10 5561 days 17%
Meyer 9/10 5563 days 20%
Lucy 8/10 5565 days 18%

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

-2.63% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 98 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 -2.59%
198 -2.60%
199 -2.62%
200 -2.63%
201 -2.64%
202 -2.66%
203 -2.67%

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.