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

81.88%

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 1089 days 93%
Rado Hank 8/10 1418 days 100%
Matthias and Adriane 9/10 1673 days 93%
Laure and Pascal 9/10 1686 days 93%
Thomas Klinting 10/10 1712 days 91%
Helna Saumanova 9/10 1717 days 91%
Danny 7/10 1769 days 80%
Marine Lavie 8/10 2031 days 72%
Cate Ronke 8/10 2034 days 72%
Stephan Friedrich 9/10 2050 days 75%
Stula Vladimir 10/10 2068 days 74%
Isabelle 10/10 2071 days 74%
Mikkel Palleson 7/10 2074 days 67%
Meilin 5/10 2080 days 59%
Sebastian and Susanna 7/10 2119 days 65%
Jakob Gerber 7/10 2124 days 65%
Marie Weber 9/10 2433 days 57%
Erik Hafuer 4/10 2467 days 43%
Caroline Jonsson 7/10 2732 days 38%
Jonny Ronnblom 7/10 2732 days 38%
Catherine Schlachter 9/10 2739 days 42%
Christina Perez 8/10 2739 days 40%
Bea Westkam 10/10 2748 days 42%
Julia Moellers 8/10 2748 days 40%
Anne Haenchen 8/10 2764 days 39%
Kathi 8/10 2764 days 39%
Sophia 7/10 2781 days 36%
Lukas 6/10 2790 days 33%
Celine Darde 8/10 2804 days 37%
Ludovic Denee 8/10 2804 days 37%
Melanie Pretzel 8/10 3131 days 22%
Frederic Birke 8/10 3131 days 22%
Andre and Marina 2/10 3162 days 16%
Hanneke P 7/10 3188 days 19%
Joroen Borkert 9/10 3206 days 20%
Roux 8/10 3209 days 19%
Leo 9/10 3223 days 19%
Lutz Huuemorder 8/10 3225 days 18%
Henzen 8/10 3228 days 18%
Tuedi Muggli 10/10 3491 days 6%
Romla 8/10 3501 days 5%
Ronald Veldman 8/10 3501 days 5%
Richard 8/10 3504 days 5%
Marie Dutron 6/10 3504 days 4%
Carl & Desiree Potter 9/10 3506 days 5%
Frans 10/10 3506 days 5%
Preben vil Helmsen 10/10 3506 days 5%
Johann Maier 10/10 3507 days 5%
Gillian MacLaren 8/10 3508 days 5%
Eline Vakentijn 8/10 3508 days 5%
Langerak 9/10 3510 days 5%
Magda Savels 8/10 3516 days 5%
Roger ter Horst 9/10 3518 days 5%
Maria Dietrich 9/10 3518 days 5%
Samplonius 8/10 3518 days 4%
Manuela Zimmerti 9/10 3586 days 2%
Dirk Faupel 9/10 3589 days 1%
Dirk Faupel 9/10 3589 days 1%
Robert Carswell 7/10 3591 days 1%
Marc & Pauline 8/10 3591 days 1%
Gerard Crothers 10/10 3592 days 1%
Steve Eley 7/10 3594 days 1%
van Rees 8/10 3594 days 1%
Ron & Hannah de Reuver 9/10 3599 days 1%
Wolfgang Goggel 9/10 3599 days 1%
Gary A 7/10 3615 days 0%
Tina 9/10 3615 days 0%
Jon_and_Family 8/10 3829 days 22%
Franzi & Tobi 9/10 3840 days 23%
Oliver Berg 7/10 3843 days 21%
Marianne Wheatley 10/10 3848 days 23%
Krabbe 8/10 3851 days 22%
Rolf 4/10 3851 days 18%
Malcolm Jones 8/10 3853 days 22%
Berger 8/10 3864 days 22%
Pieter 9/10 3865 days 23%
mr Schumader 9/10 3874 days 23%
Tamlin Barton 6/10 3875 days 19%
Tim Van Nispen 8/10 3876 days 22%
Johanna 6/10 3877 days 19%
Eva Stauderova 10/10 3879 days 23%
Patrick Decoster 9/10 3881 days 23%
Liz Dolman 8/10 3883 days 22%
Kay and Colin Yendole 9/10 3884 days 23%
Chamton 6/10 3888 days 19%
willsworthy 9/10 3980 days 23%
allesca 8/10 4011 days 22%
Bergemann 8/10 4211 days 22%
Silke Seemann 9/10 4216 days 23%
John Harrison 8/10 4232 days 22%
Tanja Haring 9/10 4238 days 23%
Amanda Hoff 10/10 4253 days 23%
Beute Jacob 8/10 4266 days 22%
Alies van der plank 8/10 4270 days 22%
mariekef 10/10 4299 days 23%
sanneb1 8/10 4300 days 22%
keane 7/10 4300 days 21%
mariak 8/10 4301 days 22%
usigmund 8/10 4304 days 22%
hofstetterf 10/10 4313 days 23%
Stefan Lua 10/10 4317 days 23%
Peter Essink 9/10 4317 days 23%
Wolfgang Mages 10/10 4319 days 23%
Ann S 10/10 4323 days 23%
Roeder Grit 8/10 4326 days 22%
ulrichk 10/10 4432 days 23%
gerrys 7/10 4514 days 21%
RolandV 10/10 4543 days 23%
GemmaC 8/10 4548 days 22%
CeesVanW 8/10 4556 days 22%
LaurensD 7/10 4559 days 21%
StefanieA 10/10 4561 days 23%
Hendrik Flier 7/10 4565 days 21%
PBouwmessten 9/10 4579 days 23%
MauzcoV 9/10 4579 days 23%
marcusr 9/10 4600 days 23%
Eugene 10/10 4600 days 23%
Tony 10/10 4607 days 23%
Ian S 9/10 4608 days 23%
Miguel 9/10 4609 days 23%
Thamar 8/10 4623 days 22%
Andie 10/10 4631 days 23%
Miranda 8/10 4635 days 22%
Miha 10/10 4664 days 23%
Gerits 10/10 4671 days 23%
Sluijs 10/10 4676 days 23%
olland 10/10 4679 days 23%
Liz 10/10 4698 days 23%
Stefan 9/10 4723 days 23%
Cory Fusco 8/10 4783 days 22%
Katie Wise 10/10 4791 days 23%
Heckter 7/10 4930 days 21%
Jennifer Baulch 9/10 4935 days 23%
Nancy Dol 7/10 4956 days 21%
David Buckley 9/10 4959 days 23%
Jenny Hulsebosch 9/10 4987 days 23%
Peter 10/10 5028 days 23%
bart 6/10 5033 days 19%
Miriam&Eva 5/10 5249 days 18%
Dennis 8/10 5306 days 22%
Arjan 7/10 5320 days 21%
Meyer 9/10 5322 days 23%
Lucy 8/10 5324 days 22%

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

-3.12% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 72 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 -3.07%
198 -3.09%
199 -3.10%
200 -3.12%
201 -3.13%
202 -3.15%
203 -3.16%

Final Ranking Score

79%

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.