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

70.53%

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 3/10 409 days 56.59 100%
Rado Hank 8/10 738 days true 23.94 42%
Matthias and Adriane 9/10 993 days true 6.65 12%
Laure and Pascal 9/10 1006 days true 6.26 11%
Thomas Klinting 10/10 1032 days true 5.63 10%
Helna Saumanova 9/10 1037 days true 5.53 10%
Danny 7/10 1089 days true 4.56 8%
Marine Lavie 8/10 1351 days true 4.27 8%
Cate Ronke 8/10 1354 days true 4.27 8%
Stephan Friedrich 9/10 1370 days 4.46 8%
Stula Vladimir 10/10 1388 days true 4.43 8%
Isabelle 10/10 1391 days true 4.42 8%
Mikkel Palleson 7/10 1394 days true 4.02 7%
Meilin 5/10 1400 days true 3.57 6%
Sebastian and Susanna 7/10 1439 days true 3.94 7%
Jakob Gerber 7/10 1444 days 3.93 7%
Marie Weber 9/10 1753 days true 3.71 7%
Erik Hafuer 4/10 1787 days true 2.88 5%
Caroline Jonsson 7/10 2052 days true 2.85 5%
Jonny Ronnblom 7/10 2052 days true 2.85 5%
Catherine Schlachter 9/10 2059 days true 3.11 6%
Christina Perez 8/10 2059 days true 2.96 5%
Bea Westkam 10/10 2068 days true 3.1 5%
Julia Moellers 8/10 2068 days true 2.94 5%
Anne Haenchen 8/10 2084 days true 2.91 5%
Kathi 8/10 2084 days true 2.91 5%
Sophia 7/10 2101 days true 2.76 5%
Lukas 6/10 2110 days true 2.5 4%
Celine Darde 8/10 2124 days true 2.84 5%
Ludovic Denee 8/10 2124 days true 2.84 5%
Melanie Pretzel 8/10 2451 days true 2.23 4%
Frederic Birke 8/10 2451 days true 2.23 4%
Andre and Marina 2/10 2482 days true 1.71 3%
Hanneke P 7/10 2508 days 2.03 4%
Joroen Borkert 9/10 2526 days true 2.2 4%
Roux 8/10 2529 days true 2.08 4%
Leo 9/10 2543 days true 2.17 4%
Lutz Huuemorder 8/10 2545 days true 2.05 4%
Henzen 8/10 2548 days true 2.05 4%
Tuedi Muggli 10/10 2811 days true 1.64 3%
Romla 8/10 2821 days true 1.54 3%
Ronald Veldman 8/10 2821 days true 1.54 3%
Richard 8/10 2824 days true 1.54 3%
Marie Dutron 6/10 2824 days true 1.34 2%
Carl & Desiree Potter 9/10 2826 days true 1.61 3%
Frans 10/10 2826 days true 1.61 3%
Preben vil Helmsen 10/10 2826 days true 1.61 3%
Johann Maier 10/10 2827 days true 1.61 3%
Gillian MacLaren 8/10 2828 days true 1.53 3%
Eline Vakentijn 8/10 2828 days true 1.53 3%
Langerak 9/10 2830 days true 1.6 3%
Magda Savels 8/10 2836 days true 1.51 3%
Roger ter Horst 9/10 2838 days true 1.59 3%
Maria Dietrich 9/10 2838 days true 1.59 3%
Samplonius 8/10 2838 days true 1.51 3%
Manuela Zimmerti 9/10 2906 days true 1.46 3%
Dirk Faupel 9/10 2909 days true 1.45 3%
Dirk Faupel 9/10 2909 days true 1.45 3%
Robert Carswell 7/10 2911 days true 1.32 2%
Marc & Pauline 8/10 2911 days true 1.37 2%
Gerard Crothers 10/10 2912 days true 1.44 3%
Steve Eley 7/10 2914 days true 1.31 2%
van Rees 8/10 2914 days true 1.37 2%
Ron & Hannah de Reuver 9/10 2919 days true 1.43 3%
Wolfgang Goggel 9/10 2919 days true 1.43 3%
Gary A 7/10 2935 days true 1.27 2%
Tina 9/10 2935 days true 1.4 2%
Jon_and_Family 8/10 3149 days 0.93 2%
Franzi & Tobi 9/10 3160 days true 0.96 2%
Oliver Berg 7/10 3163 days true 0.87 2%
Marianne Wheatley 10/10 3168 days true 0.94 2%
Krabbe 8/10 3171 days true 0.89 2%
Rolf 4/10 3171 days true 0.74 1%
Malcolm Jones 8/10 3173 days true 0.89 2%
Berger 8/10 3184 days true 0.87 2%
Pieter 9/10 3185 days true 0.91 2%
mr Schumader 9/10 3194 days true 0.89 2%
Tamlin Barton 6/10 3195 days true 0.74 1%
Tim Van Nispen 8/10 3196 days true 0.84 1%
Johanna 6/10 3197 days true 0.74 1%
Eva Stauderova 10/10 3199 days true 0.88 2%
Patrick Decoster 9/10 3201 days true 0.88 2%
Liz Dolman 8/10 3203 days true 0.83 1%
Kay and Colin Yendole 9/10 3204 days true 0.87 2%
Chamton 6/10 3208 days true 0.72 1%
willsworthy 9/10 3300 days 0.68 1%
allesca 8/10 3331 days 0.59 1%
Bergemann 8/10 3531 days true 0.22 0%
Silke Seemann 9/10 3536 days true 0.22 0%
John Harrison 8/10 3552 days true 0.18 0%
Tanja Haring 9/10 3558 days true 0.18 0%
Amanda Hoff 10/10 3573 days 0.15 0%
Beute Jacob 8/10 3586 days true 0.12 0%
Alies van der plank 8/10 3590 days true 0.11 0%
mariekef 10/10 3619 days true 0.06 0%
sanneb1 8/10 3620 days true 0.06 0%
keane 7/10 3620 days true 0.05 0%
mariak 8/10 3621 days true 0.05 0%
usigmund 8/10 3624 days true 0.05 0%
hofstetterf 10/10 3633 days true 0.03 0%
Stefan Lua 10/10 3637 days true 0.03 0%
Peter Essink 9/10 3637 days true 0.03 0%
Wolfgang Mages 10/10 3639 days true 0.02 0%
Ann S 10/10 3643 days true 0.01 0%
Roeder Grit 8/10 3646 days true 0.01 0%
ulrichk 10/10 3752 days true 0.0 0%
gerrys 7/10 3834 days true 0.0 0%
RolandV 10/10 3863 days true 0.0 0%
GemmaC 8/10 3868 days true 0.0 0%
CeesVanW 8/10 3876 days true 0.0 0%
LaurensD 7/10 3879 days true 0.0 0%
StefanieA 10/10 3881 days true 0.0 0%
Hendrik Flier 7/10 3885 days true 0.0 0%
PBouwmessten 9/10 3899 days true 0.0 0%
MauzcoV 9/10 3899 days true 0.0 0%
marcusr 9/10 3921 days true 0.0 0%
Eugene 10/10 3921 days true 0.0 0%
Tony 10/10 3928 days true 0.0 0%
Ian S 9/10 3929 days true 0.0 0%
Miguel 9/10 3930 days true 0.0 0%
Thamar 8/10 3944 days true 0.0 0%
Andie 10/10 3952 days true 0.0 0%
Miranda 8/10 3956 days true 0.0 0%
Miha 10/10 3984 days true 0.0 0%
Gerits 10/10 3992 days true 0.0 0%
Sluijs 10/10 3997 days true 0.0 0%
olland 10/10 4000 days true 0.0 0%
Liz 10/10 4019 days true 0.0 0%
Stefan 9/10 4043 days true 0.0 0%
Cory Fusco 8/10 4104 days true 0.0 0%
Katie Wise 10/10 4112 days true 0.0 0%
Heckter 7/10 4250 days true 0.0 0%
Jennifer Baulch 9/10 4255 days true 0.0 0%
Nancy Dol 7/10 4276 days true 0.0 0%
David Buckley 9/10 4279 days true 0.0 0%
Jenny Hulsebosch 9/10 4307 days true 0.0 0%
Peter 10/10 4348 days true 0.0 0%
bart 6/10 4353 days true 0.0 0%
Miriam&Eva 5/10 4569 days true 0.0 0%
Dennis 8/10 4626 days true 0.0 0%
Arjan 7/10 4640 days true 0.0 0%
Meyer 9/10 4642 days true 0.0 0%
Lucy 8/10 4644 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

67%

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.