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

75.74%

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 3/10 792 days 15.05 100%
Rado Hank 8/10 1121 days true 4.7 31%
Matthias and Adriane 9/10 1376 days true 4.45 30%
Laure and Pascal 9/10 1389 days true 4.42 29%
Thomas Klinting 10/10 1415 days true 4.37 29%
Helna Saumanova 9/10 1420 days true 4.36 29%
Danny 7/10 1472 days true 3.88 26%
Marine Lavie 8/10 1734 days true 3.56 24%
Cate Ronke 8/10 1737 days true 3.56 24%
Stephan Friedrich 9/10 1753 days 3.71 25%
Stula Vladimir 10/10 1771 days true 3.68 24%
Isabelle 10/10 1774 days true 3.67 24%
Mikkel Palleson 7/10 1777 days true 3.34 22%
Meilin 5/10 1783 days true 2.96 20%
Sebastian and Susanna 7/10 1822 days true 3.26 22%
Jakob Gerber 7/10 1827 days 3.25 22%
Marie Weber 9/10 2136 days true 2.96 20%
Erik Hafuer 4/10 2170 days true 2.29 15%
Caroline Jonsson 7/10 2435 days true 2.16 14%
Jonny Ronnblom 7/10 2435 days true 2.16 14%
Catherine Schlachter 9/10 2442 days true 2.36 16%
Christina Perez 8/10 2442 days true 2.25 15%
Bea Westkam 10/10 2451 days true 2.35 16%
Julia Moellers 8/10 2451 days true 2.23 15%
Anne Haenchen 8/10 2467 days true 2.2 15%
Kathi 8/10 2467 days true 2.2 15%
Sophia 7/10 2484 days true 2.08 14%
Lukas 6/10 2493 days true 1.88 12%
Celine Darde 8/10 2507 days true 2.12 14%
Ludovic Denee 8/10 2507 days true 2.12 14%
Melanie Pretzel 8/10 2834 days true 1.52 10%
Frederic Birke 8/10 2834 days true 1.52 10%
Andre and Marina 2/10 2865 days true 1.15 8%
Hanneke P 7/10 2891 days 1.35 9%
Joroen Borkert 9/10 2909 days true 1.45 10%
Roux 8/10 2912 days true 1.37 9%
Leo 9/10 2926 days true 1.42 9%
Lutz Huuemorder 8/10 2928 days true 1.34 9%
Henzen 8/10 2931 days true 1.34 9%
Tuedi Muggli 10/10 3194 days true 0.89 6%
Romla 8/10 3204 days true 0.83 6%
Ronald Veldman 8/10 3204 days true 0.83 6%
Richard 8/10 3207 days true 0.82 5%
Marie Dutron 6/10 3207 days true 0.72 5%
Carl & Desiree Potter 9/10 3209 days true 0.86 6%
Frans 10/10 3209 days true 0.86 6%
Preben vil Helmsen 10/10 3209 days true 0.86 6%
Johann Maier 10/10 3210 days true 0.86 6%
Gillian MacLaren 8/10 3211 days true 0.82 5%
Eline Vakentijn 8/10 3211 days true 0.82 5%
Langerak 9/10 3213 days true 0.86 6%
Magda Savels 8/10 3219 days true 0.8 5%
Roger ter Horst 9/10 3221 days true 0.84 6%
Maria Dietrich 9/10 3221 days true 0.84 6%
Samplonius 8/10 3221 days true 0.8 5%
Manuela Zimmerti 9/10 3289 days true 0.71 5%
Dirk Faupel 9/10 3292 days true 0.7 5%
Dirk Faupel 9/10 3292 days true 0.7 5%
Robert Carswell 7/10 3294 days true 0.63 4%
Marc & Pauline 8/10 3294 days true 0.66 4%
Gerard Crothers 10/10 3295 days true 0.69 5%
Steve Eley 7/10 3297 days true 0.63 4%
van Rees 8/10 3297 days true 0.66 4%
Ron & Hannah de Reuver 9/10 3302 days true 0.68 5%
Wolfgang Goggel 9/10 3302 days true 0.68 5%
Gary A 7/10 3318 days true 0.59 4%
Tina 9/10 3318 days true 0.65 4%
Jon_and_Family 8/10 3532 days 0.22 1%
Franzi & Tobi 9/10 3543 days true 0.21 1%
Oliver Berg 7/10 3546 days true 0.19 1%
Marianne Wheatley 10/10 3551 days true 0.19 1%
Krabbe 8/10 3554 days true 0.18 1%
Rolf 4/10 3554 days true 0.15 1%
Malcolm Jones 8/10 3556 days true 0.17 1%
Berger 8/10 3567 days true 0.15 1%
Pieter 9/10 3568 days true 0.16 1%
mr Schumader 9/10 3577 days true 0.14 1%
Tamlin Barton 6/10 3578 days true 0.12 1%
Tim Van Nispen 8/10 3579 days true 0.13 1%
Johanna 6/10 3580 days true 0.11 1%
Eva Stauderova 10/10 3582 days true 0.13 1%
Patrick Decoster 9/10 3584 days true 0.13 1%
Liz Dolman 8/10 3586 days true 0.12 1%
Kay and Colin Yendole 9/10 3587 days true 0.12 1%
Chamton 6/10 3591 days true 0.1 1%
willsworthy 9/10 3683 days 0.0 0%
allesca 8/10 3714 days 0.0 0%
Bergemann 8/10 3914 days true 0.0 0%
Silke Seemann 9/10 3919 days true 0.0 0%
John Harrison 8/10 3935 days true 0.0 0%
Tanja Haring 9/10 3941 days true 0.0 0%
Amanda Hoff 10/10 3956 days 0.0 0%
Beute Jacob 8/10 3969 days true 0.0 0%
Alies van der plank 8/10 3973 days true 0.0 0%
mariekef 10/10 4002 days true 0.0 0%
sanneb1 8/10 4003 days true 0.0 0%
keane 7/10 4003 days true 0.0 0%
mariak 8/10 4004 days true 0.0 0%
usigmund 8/10 4007 days true 0.0 0%
hofstetterf 10/10 4016 days true 0.0 0%
Stefan Lua 10/10 4020 days true 0.0 0%
Peter Essink 9/10 4020 days true 0.0 0%
Wolfgang Mages 10/10 4022 days true 0.0 0%
Ann S 10/10 4026 days true 0.0 0%
Roeder Grit 8/10 4029 days true 0.0 0%
ulrichk 10/10 4135 days true 0.0 0%
gerrys 7/10 4217 days true 0.0 0%
RolandV 10/10 4246 days true 0.0 0%
GemmaC 8/10 4251 days true 0.0 0%
CeesVanW 8/10 4259 days true 0.0 0%
LaurensD 7/10 4262 days true 0.0 0%
StefanieA 10/10 4264 days true 0.0 0%
Hendrik Flier 7/10 4268 days true 0.0 0%
PBouwmessten 9/10 4282 days true 0.0 0%
MauzcoV 9/10 4282 days true 0.0 0%
marcusr 9/10 4303 days true 0.0 0%
Eugene 10/10 4303 days true 0.0 0%
Tony 10/10 4310 days true 0.0 0%
Ian S 9/10 4311 days true 0.0 0%
Miguel 9/10 4312 days true 0.0 0%
Thamar 8/10 4326 days true 0.0 0%
Andie 10/10 4334 days true 0.0 0%
Miranda 8/10 4338 days true 0.0 0%
Miha 10/10 4367 days true 0.0 0%
Gerits 10/10 4374 days true 0.0 0%
Sluijs 10/10 4379 days true 0.0 0%
olland 10/10 4382 days true 0.0 0%
Liz 10/10 4401 days true 0.0 0%
Stefan 9/10 4426 days true 0.0 0%
Cory Fusco 8/10 4486 days true 0.0 0%
Katie Wise 10/10 4494 days true 0.0 0%
Heckter 7/10 4633 days true 0.0 0%
Jennifer Baulch 9/10 4638 days true 0.0 0%
Nancy Dol 7/10 4659 days true 0.0 0%
David Buckley 9/10 4662 days true 0.0 0%
Jenny Hulsebosch 9/10 4690 days true 0.0 0%
Peter 10/10 4731 days true 0.0 0%
bart 6/10 4736 days true 0.0 0%
Miriam&Eva 5/10 4952 days true 0.0 0%
Dennis 8/10 5009 days true 0.0 0%
Arjan 7/10 5023 days true 0.0 0%
Meyer 9/10 5025 days true 0.0 0%
Lucy 8/10 5027 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

-4.07% 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 -4.01%
198 -4.03%
199 -4.05%
200 -4.07%
201 -4.09%
202 -4.11%
203 -4.13%

Final Ranking Score

72%

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.