Ranking Score Explained

Kia ora, 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.

Cymen Crick's avatar

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

83.56%

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 2456 days 62%
Rado Hank 8/10 2785 days 100%
Matthias and Adriane 9/10 3040 days 83%
Laure and Pascal 9/10 3053 days 82%
Thomas Klinting 10/10 3079 days 81%
Helna Saumanova 9/10 3084 days 80%
Danny 7/10 3136 days 70%
Marine Lavie 8/10 3398 days 56%
Cate Ronke 8/10 3401 days 56%
Stephan Friedrich 9/10 3417 days 56%
Stula Vladimir 10/10 3435 days 55%
Isabelle 10/10 3438 days 55%
Mikkel Palleson 7/10 3441 days 50%
Meilin 5/10 3447 days 38%
Sebastian and Susanna 7/10 3486 days 47%
Jakob Gerber 7/10 3491 days 46%
Marie Weber 9/10 3800 days 28%
Erik Hafuer 4/10 3834 days 12%
Caroline Jonsson 7/10 4099 days 5%
Jonny Ronnblom 7/10 4099 days 5%
Catherine Schlachter 9/10 4106 days 6%
Christina Perez 8/10 4106 days 6%
Bea Westkam 10/10 4115 days 5%
Julia Moellers 8/10 4115 days 5%
Anne Haenchen 8/10 4131 days 4%
Kathi 8/10 4131 days 4%
Sophia 7/10 4148 days 2%
Lukas 6/10 4157 days 0%
Celine Darde 8/10 4171 days 1%
Ludovic Denee 8/10 4171 days 1%
Melanie Pretzel 8/10 4498 days 23%
Frederic Birke 8/10 4498 days 23%
Andre and Marina 2/10 4529 days 3%
Hanneke P 7/10 4555 days 21%
Joroen Borkert 9/10 4573 days 23%
Roux 8/10 4576 days 23%
Leo 9/10 4590 days 23%
Lutz Huuemorder 8/10 4592 days 23%
Henzen 8/10 4595 days 23%
Tuedi Muggli 10/10 4858 days 23%
Romla 8/10 4868 days 23%
Ronald Veldman 8/10 4868 days 23%
Richard 8/10 4871 days 23%
Marie Dutron 6/10 4871 days 18%
Carl & Desiree Potter 9/10 4873 days 23%
Frans 10/10 4873 days 23%
Preben vil Helmsen 10/10 4873 days 23%
Johann Maier 10/10 4874 days 23%
Gillian MacLaren 8/10 4875 days 23%
Eline Vakentijn 8/10 4875 days 23%
Langerak 9/10 4877 days 23%
Magda Savels 8/10 4883 days 23%
Roger ter Horst 9/10 4885 days 23%
Maria Dietrich 9/10 4885 days 23%
Samplonius 8/10 4885 days 23%
Manuela Zimmerti 9/10 4953 days 23%
Dirk Faupel 9/10 4956 days 23%
Dirk Faupel 9/10 4956 days 23%
Robert Carswell 7/10 4958 days 21%
Marc & Pauline 8/10 4958 days 23%
Gerard Crothers 10/10 4959 days 23%
Steve Eley 7/10 4961 days 21%
van Rees 8/10 4961 days 23%
Ron & Hannah de Reuver 9/10 4966 days 23%
Wolfgang Goggel 9/10 4966 days 23%
Gary A 7/10 4982 days 21%
Tina 9/10 4982 days 23%
Jon_and_Family 8/10 5196 days 23%
Franzi & Tobi 9/10 5207 days 23%
Oliver Berg 7/10 5210 days 21%
Marianne Wheatley 10/10 5215 days 23%
Krabbe 8/10 5218 days 23%
Rolf 4/10 5218 days 10%
Malcolm Jones 8/10 5220 days 23%
Berger 8/10 5231 days 23%
Pieter 9/10 5232 days 23%
mr Schumader 9/10 5241 days 23%
Tamlin Barton 6/10 5242 days 18%
Tim Van Nispen 8/10 5243 days 23%
Johanna 6/10 5244 days 18%
Eva Stauderova 10/10 5246 days 23%
Patrick Decoster 9/10 5248 days 23%
Liz Dolman 8/10 5250 days 23%
Kay and Colin Yendole 9/10 5251 days 23%
Chamton 6/10 5255 days 18%
willsworthy 9/10 5347 days 23%
allesca 8/10 5378 days 23%
Bergemann 8/10 5578 days 23%
Silke Seemann 9/10 5583 days 23%
John Harrison 8/10 5599 days 23%
Tanja Haring 9/10 5605 days 23%
Amanda Hoff 10/10 5620 days 23%
Beute Jacob 8/10 5633 days 23%
Alies van der plank 8/10 5637 days 23%
mariekef 10/10 5666 days 23%
sanneb1 8/10 5667 days 23%
keane 7/10 5667 days 21%
mariak 8/10 5668 days 23%
usigmund 8/10 5671 days 23%
hofstetterf 10/10 5680 days 23%
Stefan Lua 10/10 5684 days 23%
Peter Essink 9/10 5684 days 23%
Wolfgang Mages 10/10 5686 days 23%
Ann S 10/10 5690 days 23%
Roeder Grit 8/10 5693 days 23%
ulrichk 10/10 5799 days 23%
gerrys 7/10 5881 days 21%
RolandV 10/10 5910 days 23%
GemmaC 8/10 5915 days 23%
CeesVanW 8/10 5923 days 23%
LaurensD 7/10 5926 days 21%
StefanieA 10/10 5928 days 23%
Hendrik Flier 7/10 5932 days 21%
PBouwmessten 9/10 5946 days 23%
MauzcoV 9/10 5946 days 23%
marcusr 9/10 5967 days 23%
Eugene 10/10 5967 days 23%
Tony 10/10 5974 days 23%
Ian S 9/10 5975 days 23%
Miguel 9/10 5976 days 23%
Thamar 8/10 5990 days 23%
Andie 10/10 5998 days 23%
Miranda 8/10 6002 days 23%
Miha 10/10 6030 days 23%
Gerits 10/10 6038 days 23%
Sluijs 10/10 6043 days 23%
olland 10/10 6046 days 23%
Liz 10/10 6065 days 23%
Stefan 9/10 6090 days 23%
Cory Fusco 8/10 6150 days 23%
Katie Wise 10/10 6158 days 23%
Heckter 7/10 6297 days 21%
Jennifer Baulch 9/10 6302 days 23%
Nancy Dol 7/10 6323 days 21%
David Buckley 9/10 6326 days 23%
Jenny Hulsebosch 9/10 6354 days 23%
Peter 10/10 6395 days 23%
bart 6/10 6400 days 18%
Miriam&Eva 5/10 6616 days 14%
Dennis 8/10 6673 days 23%
Arjan 7/10 6687 days 21%
Meyer 9/10 6689 days 23%
Lucy 8/10 6691 days 23%

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

-2.13% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 119 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 -2.10%
198 -2.11%
199 -2.12%
200 -2.13%
201 -2.14%
202 -2.15%
203 -2.16%

Balancing Adjustment

2.62% 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

84%

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.