Ranking Score Explained

Hey, 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

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

83.47%

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 2243 days 66%
Rado Hank 8/10 2572 days 100%
Matthias and Adriane 9/10 2827 days 87%
Laure and Pascal 9/10 2840 days 86%
Thomas Klinting 10/10 2866 days 85%
Helna Saumanova 9/10 2871 days 84%
Danny 7/10 2923 days 77%
Marine Lavie 8/10 3185 days 66%
Cate Ronke 8/10 3188 days 66%
Stephan Friedrich 9/10 3204 days 66%
Stula Vladimir 10/10 3222 days 65%
Isabelle 10/10 3225 days 65%
Mikkel Palleson 7/10 3228 days 60%
Meilin 5/10 3234 days 49%
Sebastian and Susanna 7/10 3273 days 58%
Jakob Gerber 7/10 3278 days 58%
Marie Weber 9/10 3587 days 44%
Erik Hafuer 4/10 3621 days 28%
Caroline Jonsson 7/10 3886 days 26%
Jonny Ronnblom 7/10 3886 days 26%
Catherine Schlachter 9/10 3893 days 27%
Christina Perez 8/10 3893 days 27%
Bea Westkam 10/10 3902 days 27%
Julia Moellers 8/10 3902 days 26%
Anne Haenchen 8/10 3918 days 26%
Kathi 8/10 3918 days 26%
Sophia 7/10 3935 days 23%
Lukas 6/10 3944 days 21%
Celine Darde 8/10 3958 days 23%
Ludovic Denee 8/10 3958 days 23%
Melanie Pretzel 8/10 4285 days 5%
Frederic Birke 8/10 4285 days 5%
Andre and Marina 2/10 4316 days 2%
Hanneke P 7/10 4342 days 2%
Joroen Borkert 9/10 4360 days 1%
Roux 8/10 4363 days 1%
Leo 9/10 4377 days 0%
Lutz Huuemorder 8/10 4379 days 0%
Henzen 8/10 4382 days 28%
Tuedi Muggli 10/10 4645 days 29%
Romla 8/10 4655 days 28%
Ronald Veldman 8/10 4655 days 28%
Richard 8/10 4658 days 28%
Marie Dutron 6/10 4658 days 25%
Carl & Desiree Potter 9/10 4660 days 29%
Frans 10/10 4660 days 29%
Preben vil Helmsen 10/10 4660 days 29%
Johann Maier 10/10 4661 days 29%
Gillian MacLaren 8/10 4662 days 28%
Eline Vakentijn 8/10 4662 days 28%
Langerak 9/10 4664 days 29%
Magda Savels 8/10 4670 days 28%
Roger ter Horst 9/10 4672 days 29%
Maria Dietrich 9/10 4672 days 29%
Samplonius 8/10 4672 days 28%
Manuela Zimmerti 9/10 4740 days 29%
Dirk Faupel 9/10 4743 days 29%
Dirk Faupel 9/10 4743 days 29%
Robert Carswell 7/10 4745 days 27%
Marc & Pauline 8/10 4745 days 28%
Gerard Crothers 10/10 4746 days 29%
Steve Eley 7/10 4748 days 27%
van Rees 8/10 4748 days 28%
Ron & Hannah de Reuver 9/10 4753 days 29%
Wolfgang Goggel 9/10 4753 days 29%
Gary A 7/10 4769 days 27%
Tina 9/10 4769 days 29%
Jon_and_Family 8/10 4983 days 28%
Franzi & Tobi 9/10 4994 days 29%
Oliver Berg 7/10 4997 days 27%
Marianne Wheatley 10/10 5002 days 29%
Krabbe 8/10 5005 days 28%
Rolf 4/10 5005 days 19%
Malcolm Jones 8/10 5007 days 28%
Berger 8/10 5018 days 28%
Pieter 9/10 5019 days 29%
mr Schumader 9/10 5028 days 29%
Tamlin Barton 6/10 5029 days 25%
Tim Van Nispen 8/10 5030 days 28%
Johanna 6/10 5031 days 25%
Eva Stauderova 10/10 5033 days 29%
Patrick Decoster 9/10 5035 days 29%
Liz Dolman 8/10 5037 days 28%
Kay and Colin Yendole 9/10 5038 days 29%
Chamton 6/10 5042 days 25%
willsworthy 9/10 5134 days 29%
allesca 8/10 5165 days 28%
Bergemann 8/10 5365 days 28%
Silke Seemann 9/10 5370 days 29%
John Harrison 8/10 5386 days 28%
Tanja Haring 9/10 5392 days 29%
Amanda Hoff 10/10 5407 days 29%
Beute Jacob 8/10 5420 days 28%
Alies van der plank 8/10 5424 days 28%
mariekef 10/10 5453 days 29%
sanneb1 8/10 5454 days 28%
keane 7/10 5454 days 27%
mariak 8/10 5455 days 28%
usigmund 8/10 5458 days 28%
hofstetterf 10/10 5467 days 29%
Stefan Lua 10/10 5471 days 29%
Peter Essink 9/10 5471 days 29%
Wolfgang Mages 10/10 5473 days 29%
Ann S 10/10 5477 days 29%
Roeder Grit 8/10 5480 days 28%
ulrichk 10/10 5586 days 29%
gerrys 7/10 5668 days 27%
RolandV 10/10 5697 days 29%
GemmaC 8/10 5702 days 28%
CeesVanW 8/10 5710 days 28%
LaurensD 7/10 5713 days 27%
StefanieA 10/10 5715 days 29%
Hendrik Flier 7/10 5719 days 27%
PBouwmessten 9/10 5733 days 29%
MauzcoV 9/10 5733 days 29%
marcusr 9/10 5755 days 29%
Eugene 10/10 5755 days 29%
Tony 10/10 5762 days 29%
Ian S 9/10 5763 days 29%
Miguel 9/10 5764 days 29%
Thamar 8/10 5778 days 28%
Andie 10/10 5786 days 29%
Miranda 8/10 5790 days 28%
Miha 10/10 5818 days 29%
Gerits 10/10 5826 days 29%
Sluijs 10/10 5831 days 29%
olland 10/10 5834 days 29%
Liz 10/10 5853 days 29%
Stefan 9/10 5877 days 29%
Cory Fusco 8/10 5938 days 28%
Katie Wise 10/10 5946 days 29%
Heckter 7/10 6084 days 27%
Jennifer Baulch 9/10 6089 days 29%
Nancy Dol 7/10 6110 days 27%
David Buckley 9/10 6113 days 29%
Jenny Hulsebosch 9/10 6141 days 29%
Peter 10/10 6182 days 29%
bart 6/10 6187 days 25%
Miriam&Eva 5/10 6403 days 22%
Dennis 8/10 6460 days 28%
Arjan 7/10 6474 days 27%
Meyer 9/10 6476 days 29%
Lucy 8/10 6478 days 28%

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

-4.05% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 43 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 -3.99%
198 -4.01%
199 -4.03%
200 -4.05%
201 -4.07%
202 -4.09%
203 -4.11%

Balancing Adjustment

3.16% Adjustment

Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.

You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.

We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.

Final Ranking Score

83%

The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.