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 Doubtful Sound Overnight Cruises.

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

Doubtful Sound Overnight Cruises

Valid Reviews

89 Valid Reviews

The Doubtful Sound Overnight Cruises experience has a total of 89 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 89 valid reviews:

Rating Count Percentage
10/10 55
62%
9/10 25
28%
8/10 8
9%
7/10 0
0%
6/10 1
1%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

94.94% Average

The raw data average (mean) for all the Doubtful Sound Overnight Cruises valid reviews is 94.94% and is based on 89 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

74 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 89 valid reviews, the experience has 74 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 74 face-to-face reviews:

Rating Count Percentage
10/10 44
59%
9/10 22
30%
8/10 8
11%
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%

94.86% Average

The raw data average (mean) for all the Doubtful Sound Overnight Cruises face-to-face reviews is 94.86% and is based on 74 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

93.86%

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
Jonny Horn 9/10 1179 days true 4.84 100%
Hazel Norman 10/10 1194 days true 4.81 99%
James Jackson 10/10 1195 days true 4.8 99%
Bartlomiej Berger 9/10 1890 days true 3.44 71%
Ann Wilson 8/10 2146 days true 2.8 58%
Anne and Steve Bartlett 9/10 2211 days true 2.82 58%
Abby Rescr 9/10 2525 days true 2.2 46%
Frederick Dean 8/10 2525 days true 2.09 43%
Joey Mertzig 10/10 2542 days true 2.17 45%
Rien 9/10 2882 days true 1.5 31%
Clausen 9/10 2883 days true 1.5 31%
kiwifrenchy 10/10 2890 days 1.49 31%
Sam 10/10 2894 days true 1.48 31%
Pete & Pat Etheridge 10/10 2899 days true 1.47 30%
Mike & Jennie 9/10 2901 days true 1.47 30%
Stefes Wencke 10/10 2903 days true 1.46 30%
Uwe Henze 10/10 2904 days true 1.46 30%
Manuela Weber 10/10 2904 days true 1.46 30%
Thyg Lingdal 10/10 2918 days true 1.43 30%
caro 10/10 2950 days 1.37 28%
Dean 9/10 2965 days true 1.34 28%
Anna Bret 8/10 2990 days true 1.23 25%
Jaime Castells 9/10 2990 days true 1.29 27%
Gary Koehler 10/10 3247 days true 0.79 16%
jlgavin 6/10 3256 days 0.64 13%
Verheyen 10/10 3260 days true 0.76 16%
Chris Darlington 10/10 3264 days true 0.76 16%
Dieter Uhlmann 9/10 3267 days true 0.75 15%
Angi Otti 10/10 3275 days true 0.73 15%
Jackie Morris 10/10 3275 days true 0.73 15%
Samuel Prechel 10/10 3276 days true 0.73 15%
David Glover 10/10 3278 days true 0.73 15%
Claus Olsen 10/10 3279 days true 0.73 15%
H Schepers 9/10 3280 days true 0.72 15%
georgiarose89 10/10 3315 days 0.66 14%
chrissie2011 10/10 3315 days 0.66 14%
Chris 10/10 3534 days true 0.23 5%
Sabine 10/10 3534 days true 0.23 5%
Kevin & Chris 9/10 3554 days true 0.19 4%
davidm239 9/10 3560 days true 0.18 4%
Margie 10/10 3599 days true 0.1 2%
Agnes 8/10 3600 days true 0.09 2%
Graeme + Jane Ryan 10/10 3611 days true 0.08 2%
Westermann 10/10 3612 days true 0.07 2%
Peter Brown 10/10 3617 days true 0.06 1%
johnandgin 10/10 3621 days true 0.06 1%
Angela 10/10 3622 days true 0.05 1%
T. Timmers 9/10 3635 days true 0.03 1%
Loleit 10/10 3642 days true 0.02 0%
David Valentine 10/10 3643 days true 0.01 0%
Annette Schmitt 9/10 3643 days true 0.01 0%
Jeremy & Sarah Rind 10/10 3648 days true 0.0 0%
Jessica 9/10 3654 days true 0.0 0%
ChristinaO 10/10 3680 days 0.0 0%
Simon Jones 9/10 3680 days 0.0 0%
Jerry 10/10 3711 days 0.0 0%
HairyHaggis 9/10 3741 days 0.0 0%
Suzanne 10/10 3772 days 0.0 0%
Traveller Girl 10/10 3925 days 0.0 0%
Switz 10/10 3939 days true 0.0 0%
DanielGermany 10/10 3947 days true 0.0 0%
CornelissenS 9/10 3972 days true 0.0 0%
Inger 10/10 3972 days true 0.0 0%
Robert 9/10 3985 days true 0.0 0%
Theresa 9/10 3991 days true 0.0 0%
Sue 9/10 3994 days true 0.0 0%
Inger Skov 10/10 3998 days true 0.0 0%
Ruben 8/10 4028 days true 0.0 0%
Claire 10/10 4040 days 0.0 0%
C Digby 9/10 4045 days 0.0 0%
Adam 10/10 4085 days true 0.0 0%
Stephanie Schikora 10/10 4098 days 0.0 0%
Sue Stewart 10/10 4205 days true 0.0 0%
James Gibbs 8/10 4297 days true 0.0 0%
Helen 9/10 4305 days true 0.0 0%
Menashe 10/10 4325 days true 0.0 0%
George Jeffs 10/10 4334 days true 0.0 0%
Paul Weston 9/10 4348 days true 0.0 0%
Marian Mckinney 10/10 4348 days true 0.0 0%
Charles Price 8/10 4359 days true 0.0 0%
Vicky Elliott 10/10 4366 days true 0.0 0%
Anne Mainwaring 10/10 4374 days true 0.0 0%
Kilsby 10/10 4383 days true 0.0 0%
Dupre 8/10 4424 days true 0.0 0%
dieter 10/10 4442 days 0.0 0%
Rene Schotvanger 10/10 4557 days true 0.0 0%
Pat Brewster 10/10 4557 days true 0.0 0%
Paul Yacoumis 10/10 4683 days true 0.0 0%
Sandra 10/10 4692 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 Doubtful Sound Overnight Cruises 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 Doubtful Sound Overnight Cruises 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 Doubtful Sound Overnight Cruises 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

90%

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.