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 PiwiWiwi Campervans.

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

PiwiWiwi Campervans

Valid Reviews

170 Valid Reviews

The PiwiWiwi Campervans experience has a total of 177 reviews. There are 170 valid reviews that are included when calculating the ranking score and 7 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 170 valid reviews:

Rating Count Percentage
10/10 158
93%
9/10 11
6%
8/10 1
1%
7/10 0
0%
6/10 0
0%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

99.24% Average

The raw data average (mean) for all the PiwiWiwi Campervans valid reviews is 99.24% and is based on 170 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

6 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 170 valid reviews, the experience has 6 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 6 face-to-face reviews:

Rating Count Percentage
10/10 6
100%
9/10 0
0%
8/10 0
0%
7/10 0
0%
6/10 0
0%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

100.00% Average

The raw data average (mean) for all the PiwiWiwi Campervans face-to-face reviews is 100.00% and is based on 6 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

99.08%

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
JPliska 10/10 47 days 99.65 100%
Henry Meehan 10/10 47 days 99.65 100%
John and Barbara 10/10 78 days 99.04 99%
Phillip Hartin 10/10 78 days 99.04 99%
Andrew Borch 10/10 78 days 99.04 99%
Joash Picard 10/10 109 days 98.12 98%
Carrie 10/10 109 days 98.12 98%
Zoe 10/10 109 days 98.12 98%
Kara & Joash 10/10 109 days 98.12 98%
Marian van Voorn 9/10 109 days 98.12 98%
Amandine 10/10 109 days 98.12 98%
David Aylmore 9/10 139 days 96.94 97%
Saliha Hamici 10/10 139 days 96.94 97%
Sebastian Torfs 10/10 139 days 96.94 97%
Lochoe Mckinnon 10/10 170 days 95.42 96%
Eric 10/10 170 days 95.42 96%
Mia Tranthem 10/10 170 days 95.42 96%
kael Matthews 10/10 170 days 95.42 96%
Sophie Skinner 10/10 170 days 95.42 96%
Eddie 10/10 323 days 83.47 83%
hazel woodhead 10/10 323 days 83.47 83%
Tom Smithwick 10/10 353 days 80.25 80%
Matt 10/10 353 days 80.25 80%
John Sivigny 10/10 353 days 80.25 80%
Lizzie Watts 10/10 353 days 80.25 80%
Jonathan Clay 10/10 384 days 76.63 76%
Marita O'Brien 10/10 384 days 76.63 76%
Jan 9/10 384 days 76.63 76%
Henry 10/10 384 days 76.63 76%
Andy Barlow 10/10 412 days 73.1 73%
kath combes 10/10 412 days 73.1 73%
Roz Lobo 10/10 412 days 73.1 73%
Jorg 10/10 412 days 73.1 73%
Georgia 10/10 412 days 73.1 73%
Joss, Georgia and Stef 10/10 412 days 73.1 73%
petra 10/10 443 days 68.9 68%
Richard Janes 10/10 443 days 68.9 68%
Kristel & Tim 10/10 443 days 68.9 68%
Felix Maliers 10/10 443 days 68.9 68%
Greg and Syd 9/10 474 days 64.4 64%
Rebecca Grace 10/10 474 days 64.4 64%
Julia 9/10 474 days 64.4 64%
Jonas Himpe 10/10 504 days 59.75 59%
kohn stephan 10/10 504 days 59.75 59%
Tim Leary 10/10 504 days 59.75 59%
Tom Coul 10/10 504 days 59.75 59%
Kim Verplancke 10/10 504 days 59.75 59%
Chris Scrimshaw 10/10 504 days 59.75 59%
Martina & Trev from Switzerland 10/10 504 days 59.75 59%
Wendy and Vincent 10/10 535 days 54.64 54%
James N 10/10 627 days 39.71 38%
Gert van der Lugt 10/10 749 days 23.97 22%
Stefan Giese 10/10 749 days 23.97 22%
Hendrik Pschichholtz 10/10 749 days 23.97 22%
Ray Verbeek 10/10 749 days 23.97 22%
Andreas Herzog 10/10 777 days 21.02 19%
Tracy Frauzel 10/10 785 days true 24.27 22%
michel labrecque 10/10 808 days 18.05 16%
Garrett South 10/10 808 days 18.05 16%
Sofia Vadman 10/10 808 days 18.05 16%
Patricia Pharr-Snyder 10/10 869 days 13.09 11%
Gabriel Wappler 10/10 1083 days 5.02 2%
Phillip M 10/10 1114 days 4.97 2%
Sarah Considine 10/10 1114 days 4.97 2%
Jack + Jade Hughes 10/10 1114 days 4.97 2%
Gerry Fijal 10/10 1114 days 4.97 2%
Melanie Keller 10/10 1114 days 4.97 2%
Jasper S 10/10 1143 days 4.93 2%
Linc 9/10 1174 days 4.89 2%
Rose Gutekunst 10/10 1174 days 4.89 2%
Marcel Janser 10/10 1174 days 4.89 2%
Vicki Janes 10/10 1205 days 4.85 2%
Ky Phillips 10/10 1266 days 4.77 2%
Taylor Wirth 10/10 1296 days 4.72 2%
Emma Gaylord 10/10 1296 days 4.72 2%
Jean Capron 10/10 1449 days 4.52 2%
Barbara 10/10 1449 days 4.52 2%
Jan Menzies 10/10 1449 days 4.52 2%
Jenny Mulholland 10/10 1480 days 4.47 2%
Charles norris 10/10 1480 days 4.47 2%
Lee & Sarah . 10/10 1480 days 4.47 2%
Abi Fielder 10/10 1508 days 4.43 2%
janny van der Burg 10/10 1508 days 4.43 2%
HANNAH BROOKSBANK 10/10 1508 days 4.43 2%
Simon Betschart 10/10 1508 days 4.43 2%
Yannick 10/10 1539 days 4.39 2%
MikeHoncho 10/10 1539 days 4.39 2%
Dave Ruijter 10/10 1539 days 4.39 2%
Alison Gemrany 10/10 1539 days 4.39 2%
AndyDavies 10/10 1570 days 4.35 2%
Priscilla 10/10 1600 days 4.31 2%
Sarah Jones 10/10 1600 days 4.31 2%
Erwin & Dani Matijsen 10/10 1600 days 4.31 2%
Alanna Y 10/10 1600 days 4.31 2%
Sal Hubert 10/10 1630 days true 5.12 3%
Mia & Martin 10/10 1631 days 4.27 2%
Adam Miller 10/10 1661 days 4.22 2%
Joe Kuchman 10/10 1784 days 4.06 1%
Ryan & Rita Pierce 10/10 1814 days 4.02 1%
Janet Mook 9/10 1845 days 3.97 1%
Andy/Robyn Long 10/10 1845 days 3.97 1%
Jon Jamie 10/10 1845 days 3.97 1%
Erica Bradford 10/10 1873 days 3.93 1%
Paulo Dias 10/10 1873 days 3.93 1%
Jana Zanetto 10/10 1873 days 3.93 1%
David Haines-Hanham 10/10 1879 days true 4.71 2%
Sally Haines 10/10 1879 days true 4.71 2%
Katie 10/10 1904 days 3.89 1%
Stefanie Summer 10/10 1904 days 3.89 1%
seb_lag 9/10 1904 days 3.89 1%
Geo 10/10 1904 days 3.89 1%
Ineke & Wouter 8/10 1904 days 3.89 1%
sally haines-hanham 10/10 1904 days 3.89 1%
Marc Greeve 10/10 1912 days true 4.66 2%
Paul Eaves 10/10 1965 days 3.81 1%
Anna Barber 9/10 1965 days 3.81 1%
Adam 10/10 1996 days 3.77 1%
Rob & Margot 10/10 2026 days 3.72 1%
Vikki reeves 10/10 2026 days 3.72 1%
Gerard McAuley 10/10 2026 days 3.72 1%
Stephanie 10/10 2030 days true 4.46 2%
Ben Z 10/10 2179 days 3.52 1%
GLD 10/10 2210 days 3.47 1%
Colin Bond 10/10 2210 days 3.47 1%
HandH 10/10 2210 days 3.47 1%
Chris Ledwig 10/10 2210 days 3.47 1%
joepolog40 10/10 2210 days 3.47 1%
titougreg29 10/10 2238 days 3.43 1%
Brian 10/10 2238 days 3.43 1%
Wibo de Vries 10/10 2238 days 3.43 1%
Katie&Mike U 10/10 2238 days 3.43 1%
Peg Wooten 10/10 2269 days 3.39 1%
Marc Hoskins 10/10 2269 days 3.39 1%
Velvette 10/10 2269 days 3.39 1%
Stephanie Zellerer 10/10 2269 days 3.39 1%
Tina Gehmecker 10/10 2269 days 3.39 1%
paulcallanan 10/10 2269 days 3.39 1%
Tom Batty 10/10 2269 days 3.39 1%
Dave Worthington 10/10 2269 days 3.39 1%
Jodie Cronk 10/10 2269 days 3.39 1%
Jen&Digs M 10/10 2300 days 3.35 1%
Paul Leow 10/10 2300 days 3.35 1%
phnz 10/10 2300 days 3.35 1%
medellia371 10/10 2330 days 3.31 1%
Ihopkin 10/10 2330 days 3.31 1%
dan_robyn 10/10 2361 days 3.27 1%
erinlongtrail 10/10 2361 days 3.27 1%
sal 10/10 2391 days 3.22 1%
Horius 10/10 2391 days 3.22 1%
kayburns 9/10 2391 days 3.22 1%
Funkytiptoe 10/10 2391 days 3.22 1%
Christian Fell 10/10 2391 days 3.22 1%
aloedriscoll 10/10 2514 days 3.06 0%
h schmidt 10/10 2544 days 3.02 0%
jensmitty 10/10 2544 days 3.02 0%
aubreyfalk 10/10 2544 days 3.02 0%
WDC_Oxfam2012 10/10 2544 days 3.02 0%
doublesessions 9/10 2575 days 2.97 0%
tdean 10/10 2575 days 2.97 0%
Ewan 10/10 2575 days 2.97 0%
StefanKatie 10/10 2604 days 2.93 0%
François 10/10 2635 days 2.89 0%
essy 10/10 2666 days 2.85 0%
Bkeeping 10/10 2666 days 2.85 0%
mandaroni 10/10 2696 days 2.81 0%
cioffil 10/10 2727 days 2.76 0%
jackmason 10/10 2727 days 2.76 0%
greanman 10/10 2727 days 2.76 0%
jimmynew7121 10/10 2757 days 2.72 0%
lmharwood 10/10 2788 days 2.68 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 PiwiWiwi Campervans experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-0.36% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the PiwiWiwi Campervans 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 364 days.

The PiwiWiwi Campervans experience has been adjusted for 18 days. Adjustments are according to the following table.

Days Adjustment
15 -0.30%
16 -0.32%
17 -0.34%
18 -0.36%
19 -0.38%
20 -0.40%
21 -0.42%

Final Ranking Score

99%

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.

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