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

72.67%

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 3/10 357 days 61.45 100%
Rado Hank 8/10 686 days true 29.93 49%
Matthias and Adriane 9/10 941 days true 8.76 14%
Laure and Pascal 9/10 954 days true 8.15 13%
Thomas Klinting 10/10 980 days true 7.1 12%
Helna Saumanova 9/10 985 days true 6.92 11%
Danny 7/10 1037 days true 5.04 8%
Marine Lavie 8/10 1299 days true 4.42 7%
Cate Ronke 8/10 1302 days true 4.41 7%
Stephan Friedrich 9/10 1318 days 4.62 8%
Stula Vladimir 10/10 1336 days true 4.59 7%
Isabelle 10/10 1339 days true 4.58 7%
Mikkel Palleson 7/10 1342 days true 4.17 7%
Meilin 5/10 1348 days true 3.7 6%
Sebastian and Susanna 7/10 1387 days true 4.1 7%
Jakob Gerber 7/10 1392 days 4.09 7%
Marie Weber 9/10 1701 days true 3.96 6%
Erik Hafuer 4/10 1735 days true 3.08 5%
Caroline Jonsson 7/10 2000 days true 3.14 5%
Jonny Ronnblom 7/10 2000 days true 3.14 5%
Catherine Schlachter 9/10 2007 days true 3.44 6%
Christina Perez 8/10 2007 days true 3.27 5%
Bea Westkam 10/10 2016 days true 3.42 6%
Julia Moellers 8/10 2016 days true 3.25 5%
Anne Haenchen 8/10 2032 days true 3.23 5%
Kathi 8/10 2032 days true 3.23 5%
Sophia 7/10 2049 days true 3.06 5%
Lukas 6/10 2058 days true 2.78 5%
Celine Darde 8/10 2072 days true 3.16 5%
Ludovic Denee 8/10 2072 days true 3.16 5%
Melanie Pretzel 8/10 2399 days true 2.63 4%
Frederic Birke 8/10 2399 days true 2.63 4%
Andre and Marina 2/10 2430 days true 2.04 3%
Hanneke P 7/10 2456 days 2.43 4%
Joroen Borkert 9/10 2474 days true 2.64 4%
Roux 8/10 2477 days true 2.5 4%
Leo 9/10 2491 days true 2.61 4%
Lutz Huuemorder 8/10 2493 days true 2.48 4%
Henzen 8/10 2496 days true 2.47 4%
Tuedi Muggli 10/10 2759 days true 2.15 3%
Romla 8/10 2769 days true 2.03 3%
Ronald Veldman 8/10 2769 days true 2.03 3%
Richard 8/10 2772 days true 2.02 3%
Marie Dutron 6/10 2772 days true 1.77 3%
Carl & Desiree Potter 9/10 2774 days true 2.13 3%
Frans 10/10 2774 days true 2.13 3%
Preben vil Helmsen 10/10 2774 days true 2.13 3%
Johann Maier 10/10 2775 days true 2.12 3%
Gillian MacLaren 8/10 2776 days true 2.02 3%
Eline Vakentijn 8/10 2776 days true 2.02 3%
Langerak 9/10 2778 days true 2.12 3%
Magda Savels 8/10 2784 days true 2.0 3%
Roger ter Horst 9/10 2786 days true 2.1 3%
Maria Dietrich 9/10 2786 days true 2.1 3%
Samplonius 8/10 2786 days true 2.0 3%
Manuela Zimmerti 9/10 2854 days true 1.99 3%
Dirk Faupel 9/10 2857 days true 1.98 3%
Dirk Faupel 9/10 2857 days true 1.98 3%
Robert Carswell 7/10 2859 days true 1.8 3%
Marc & Pauline 8/10 2859 days true 1.88 3%
Gerard Crothers 10/10 2860 days true 1.98 3%
Steve Eley 7/10 2862 days true 1.8 3%
van Rees 8/10 2862 days true 1.88 3%
Ron & Hannah de Reuver 9/10 2867 days true 1.97 3%
Wolfgang Goggel 9/10 2867 days true 1.97 3%
Gary A 7/10 2883 days true 1.76 3%
Tina 9/10 2883 days true 1.94 3%
Jon_and_Family 8/10 3097 days 1.49 2%
Franzi & Tobi 9/10 3108 days true 1.55 3%
Oliver Berg 7/10 3111 days true 1.41 2%
Marianne Wheatley 10/10 3116 days true 1.54 3%
Krabbe 8/10 3119 days true 1.46 2%
Rolf 4/10 3119 days true 1.21 2%
Malcolm Jones 8/10 3121 days true 1.45 2%
Berger 8/10 3132 days true 1.44 2%
Pieter 9/10 3133 days true 1.51 2%
mr Schumader 9/10 3142 days true 1.49 2%
Tamlin Barton 6/10 3143 days true 1.24 2%
Tim Van Nispen 8/10 3144 days true 1.42 2%
Johanna 6/10 3145 days true 1.24 2%
Eva Stauderova 10/10 3147 days true 1.49 2%
Patrick Decoster 9/10 3149 days true 1.48 2%
Liz Dolman 8/10 3151 days true 1.41 2%
Kay and Colin Yendole 9/10 3152 days true 1.48 2%
Chamton 6/10 3156 days true 1.22 2%
willsworthy 9/10 3248 days 1.31 2%
allesca 8/10 3279 days 1.2 2%
Bergemann 8/10 3479 days true 0.87 1%
Silke Seemann 9/10 3484 days true 0.91 1%
John Harrison 8/10 3500 days true 0.84 1%
Tanja Haring 9/10 3506 days true 0.87 1%
Amanda Hoff 10/10 3521 days 0.85 1%
Beute Jacob 8/10 3534 days true 0.78 1%
Alies van der plank 8/10 3538 days true 0.78 1%
mariekef 10/10 3567 days true 0.77 1%
sanneb1 8/10 3568 days true 0.73 1%
keane 7/10 3568 days true 0.7 1%
mariak 8/10 3569 days true 0.73 1%
usigmund 8/10 3572 days true 0.72 1%
hofstetterf 10/10 3581 days true 0.74 1%
Stefan Lua 10/10 3585 days true 0.74 1%
Peter Essink 9/10 3585 days true 0.74 1%
Wolfgang Mages 10/10 3587 days true 0.73 1%
Ann S 10/10 3591 days true 0.73 1%
Roeder Grit 8/10 3594 days true 0.68 1%
ulrichk 10/10 3700 days true 0.54 1%
gerrys 7/10 3782 days true 0.36 1%
RolandV 10/10 3811 days true 0.35 1%
GemmaC 8/10 3816 days true 0.32 1%
CeesVanW 8/10 3824 days true 0.31 1%
LaurensD 7/10 3827 days true 0.29 0%
StefanieA 10/10 3829 days true 0.32 1%
Hendrik Flier 7/10 3833 days true 0.28 0%
PBouwmessten 9/10 3847 days true 0.29 0%
MauzcoV 9/10 3847 days true 0.29 0%
marcusr 9/10 3868 days true 0.25 0%
Eugene 10/10 3868 days true 0.25 0%
Tony 10/10 3875 days true 0.24 0%
Ian S 9/10 3876 days true 0.24 0%
Miguel 9/10 3877 days true 0.24 0%
Thamar 8/10 3891 days true 0.2 0%
Andie 10/10 3899 days true 0.2 0%
Miranda 8/10 3903 days true 0.18 0%
Miha 10/10 3931 days true 0.14 0%
Gerits 10/10 3939 days true 0.13 0%
Sluijs 10/10 3944 days true 0.12 0%
olland 10/10 3947 days true 0.12 0%
Liz 10/10 3966 days true 0.08 0%
Stefan 9/10 3990 days true 0.04 0%
Cory Fusco 8/10 4051 days true 0.0 0%
Katie Wise 10/10 4059 days true 0.0 0%
Heckter 7/10 4198 days true 0.0 0%
Jennifer Baulch 9/10 4203 days true 0.0 0%
Nancy Dol 7/10 4224 days true 0.0 0%
David Buckley 9/10 4227 days true 0.0 0%
Jenny Hulsebosch 9/10 4255 days true 0.0 0%
Peter 10/10 4296 days true 0.0 0%
bart 6/10 4301 days true 0.0 0%
Miriam&Eva 5/10 4517 days true 0.0 0%
Dennis 8/10 4574 days true 0.0 0%
Arjan 7/10 4588 days true 0.0 0%
Meyer 9/10 4590 days true 0.0 0%
Lucy 8/10 4592 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

-3.98% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 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 199 days.

The Waimangu Volcanic Valley experience has been adjusted for 199 days. Adjustments are according to the following table.

Days Adjustment
196 -3.92%
197 -3.94%
198 -3.96%
199 -3.98%
200 -4.00%
201 -4.02%
202 -4.04%

Final Ranking Score

69%

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.