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

94.60%

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 1021 days true 5.87 100%
Hazel Norman 10/10 1036 days true 5.55 95%
James Jackson 10/10 1037 days true 5.53 94%
Bartlomiej Berger 9/10 1732 days true 4.03 69%
Ann Wilson 8/10 1988 days true 3.46 59%
Anne and Steve Bartlett 9/10 2053 days true 3.54 60%
Abby Rescr 9/10 2367 days true 3.06 52%
Frederick Dean 8/10 2367 days true 2.91 50%
Joey Mertzig 10/10 2384 days true 3.04 52%
Rien 9/10 2724 days true 2.52 43%
Clausen 9/10 2725 days true 2.52 43%
kiwifrenchy 10/10 2732 days 2.51 43%
Sam 10/10 2736 days true 2.5 43%
Pete & Pat Etheridge 10/10 2741 days true 2.49 43%
Mike & Jennie 9/10 2743 days true 2.49 42%
Stefes Wencke 10/10 2745 days true 2.49 42%
Uwe Henze 10/10 2746 days true 2.49 42%
Manuela Weber 10/10 2746 days true 2.49 42%
Thyg Lingdal 10/10 2760 days true 2.47 42%
caro 10/10 2792 days 2.42 41%
Dean 9/10 2807 days true 2.39 41%
Anna Bret 8/10 2832 days true 2.24 38%
Jaime Castells 9/10 2832 days true 2.36 40%
Gary Koehler 10/10 3089 days true 1.96 33%
jlgavin 6/10 3098 days 1.62 28%
Verheyen 10/10 3102 days true 1.95 33%
Chris Darlington 10/10 3106 days true 1.94 33%
Dieter Uhlmann 9/10 3109 days true 1.93 33%
Angi Otti 10/10 3117 days true 1.92 33%
Jackie Morris 10/10 3117 days true 1.92 33%
Samuel Prechel 10/10 3118 days true 1.92 33%
David Glover 10/10 3120 days true 1.92 33%
Claus Olsen 10/10 3121 days true 1.92 33%
H Schepers 9/10 3122 days true 1.91 33%
georgiarose89 10/10 3157 days 1.86 32%
chrissie2011 10/10 3157 days 1.86 32%
Chris 10/10 3376 days true 1.53 26%
Sabine 10/10 3376 days true 1.53 26%
Kevin & Chris 9/10 3396 days true 1.5 26%
davidm239 9/10 3402 days true 1.49 25%
Margie 10/10 3441 days true 1.43 24%
Agnes 8/10 3442 days true 1.36 23%
Graeme + Jane Ryan 10/10 3453 days true 1.41 24%
Westermann 10/10 3454 days true 1.41 24%
Peter Brown 10/10 3459 days true 1.4 24%
johnandgin 10/10 3463 days true 1.4 24%
Angela 10/10 3464 days true 1.39 24%
T. Timmers 9/10 3477 days true 1.37 23%
Loleit 10/10 3484 days true 1.36 23%
David Valentine 10/10 3485 days true 1.36 23%
Annette Schmitt 9/10 3485 days true 1.36 23%
Jeremy & Sarah Rind 10/10 3490 days true 1.35 23%
Jessica 9/10 3496 days true 1.35 23%
ChristinaO 10/10 3522 days 1.31 22%
Simon Jones 9/10 3522 days 1.31 22%
Jerry 10/10 3553 days 1.26 21%
HairyHaggis 9/10 3583 days 1.21 21%
Suzanne 10/10 3614 days 1.17 20%
Traveller Girl 10/10 3767 days 0.93 16%
Switz 10/10 3781 days true 0.91 16%
DanielGermany 10/10 3789 days true 0.9 15%
CornelissenS 9/10 3814 days true 0.86 15%
Inger 10/10 3814 days true 0.86 15%
Robert 9/10 3827 days true 0.84 14%
Theresa 9/10 3833 days true 0.83 14%
Sue 9/10 3836 days true 0.83 14%
Inger Skov 10/10 3840 days true 0.82 14%
Ruben 8/10 3870 days true 0.74 13%
Claire 10/10 3882 days 0.76 13%
C Digby 9/10 3887 days 0.75 13%
Adam 10/10 3927 days true 0.69 12%
Stephanie Schikora 10/10 3940 days 0.67 11%
Sue Stewart 10/10 4047 days true 0.51 9%
James Gibbs 8/10 4139 days true 0.35 6%
Helen 9/10 4147 days true 0.35 6%
Menashe 10/10 4167 days true 0.32 6%
George Jeffs 10/10 4176 days true 0.31 5%
Paul Weston 9/10 4190 days true 0.29 5%
Marian Mckinney 10/10 4190 days true 0.29 5%
Charles Price 8/10 4201 days true 0.26 4%
Vicky Elliott 10/10 4208 days true 0.26 4%
Anne Mainwaring 10/10 4216 days true 0.25 4%
Kilsby 10/10 4225 days true 0.24 4%
Dupre 8/10 4266 days true 0.16 3%
dieter 10/10 4284 days 0.15 2%
Rene Schotvanger 10/10 4399 days true 0.0 0%
Pat Brewster 10/10 4399 days true 0.0 0%
Paul Yacoumis 10/10 4525 days true 0.0 0%
Sandra 10/10 4534 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

91%

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.