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

95.19%

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 9/10 650 days true 43.66 100%
Hazel Norman 10/10 665 days true 41.16 94%
James Jackson 10/10 666 days true 41.0 94%
Bartlomiej Berger 9/10 1361 days true 5.56 11%
Ann Wilson 8/10 1617 days true 5.14 10%
Anne and Steve Bartlett 9/10 1682 days true 5.04 10%
Abby Rescr 9/10 1996 days true 4.52 8%
Frederick Dean 8/10 1996 days true 4.52 8%
Joey Mertzig 10/10 2013 days true 4.49 8%
Rien 9/10 2353 days true 3.93 7%
Clausen 9/10 2354 days true 3.93 7%
kiwifrenchy 10/10 2361 days 3.27 5%
Sam 10/10 2365 days true 3.91 7%
Pete & Pat Etheridge 10/10 2370 days true 3.9 7%
Mike & Jennie 9/10 2372 days true 3.9 7%
Stefes Wencke 10/10 2374 days true 3.9 7%
Uwe Henze 10/10 2375 days true 3.9 7%
Manuela Weber 10/10 2375 days true 3.9 7%
Thyg Lingdal 10/10 2389 days true 3.87 7%
caro 10/10 2421 days 3.18 5%
Dean 9/10 2436 days true 3.8 7%
Anna Bret 8/10 2461 days true 3.75 7%
Jaime Castells 9/10 2461 days true 3.75 7%
Gary Koehler 10/10 2718 days true 3.33 6%
jlgavin 6/10 2727 days 2.76 4%
Verheyen 10/10 2731 days true 3.31 6%
Chris Darlington 10/10 2735 days true 3.3 5%
Dieter Uhlmann 9/10 2738 days true 3.3 5%
Angi Otti 10/10 2746 days true 3.29 5%
Jackie Morris 10/10 2746 days true 3.29 5%
Samuel Prechel 10/10 2747 days true 3.28 5%
David Glover 10/10 2749 days true 3.28 5%
Claus Olsen 10/10 2750 days true 3.28 5%
H Schepers 9/10 2751 days true 3.28 5%
georgiarose89 10/10 2786 days 2.68 4%
chrissie2011 10/10 2786 days 2.68 4%
Chris 10/10 3005 days true 2.86 4%
Sabine 10/10 3005 days true 2.86 4%
Kevin & Chris 9/10 3025 days true 2.83 4%
davidm239 9/10 3031 days true 2.82 4%
Margie 10/10 3070 days true 2.75 4%
Agnes 8/10 3071 days true 2.75 4%
Graeme + Jane Ryan 10/10 3082 days true 2.73 4%
Westermann 10/10 3083 days true 2.73 4%
Peter Brown 10/10 3088 days true 2.72 4%
johnandgin 10/10 3092 days true 2.72 4%
Angela 10/10 3093 days true 2.72 4%
T. Timmers 9/10 3106 days true 2.69 4%
Loleit 10/10 3113 days true 2.68 4%
David Valentine 10/10 3114 days true 2.68 4%
Annette Schmitt 9/10 3114 days true 2.68 4%
Jeremy & Sarah Rind 10/10 3119 days true 2.67 4%
Jessica 9/10 3125 days true 2.66 4%
ChristinaO 10/10 3151 days 2.18 3%
Simon Jones 9/10 3151 days 2.18 3%
Jerry 10/10 3182 days 2.14 3%
HairyHaggis 9/10 3212 days 2.1 3%
Suzanne 10/10 3243 days 2.06 3%
Traveller Girl 10/10 3396 days 1.85 2%
Switz 10/10 3410 days true 2.19 3%
DanielGermany 10/10 3418 days true 2.18 3%
CornelissenS 9/10 3443 days true 2.14 3%
Inger 10/10 3443 days true 2.14 3%
Robert 9/10 3457 days true 2.12 3%
Theresa 9/10 3463 days true 2.11 3%
Sue 9/10 3465 days true 2.1 3%
Inger Skov 10/10 3469 days true 2.1 3%
Ruben 8/10 3499 days true 2.05 3%
Claire 10/10 3512 days 1.69 2%
C Digby 9/10 3516 days 1.68 2%
Adam 10/10 3556 days true 1.95 2%
Stephanie Schikora 10/10 3569 days 1.61 2%
Sue Stewart 10/10 3676 days true 1.76 2%
James Gibbs 8/10 3768 days true 1.61 2%
Helen 9/10 3776 days true 1.59 1%
Menashe 10/10 3796 days true 1.56 1%
George Jeffs 10/10 3805 days true 1.55 1%
Paul Weston 9/10 3819 days true 1.52 1%
Marian Mckinney 10/10 3819 days true 1.52 1%
Charles Price 8/10 3830 days true 1.5 1%
Vicky Elliott 10/10 3837 days true 1.49 1%
Anne Mainwaring 10/10 3845 days true 1.48 1%
Kilsby 10/10 3854 days true 1.46 1%
Dupre 8/10 3895 days true 1.4 1%
dieter 10/10 3913 days 1.14 0%
Rene Schotvanger 10/10 4028 days true 1.18 1%
Pat Brewster 10/10 4028 days true 1.18 1%
Paul Yacoumis 10/10 4154 days true 0.97 0%
Sandra 10/10 4163 days true 0.96 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

-7.28% 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 364 days.

The Doubtful Sound Overnight Cruises experience has been adjusted for 364 days. Adjustments are according to the following table.

Days Adjustment
361 -7.22%
362 -7.24%
363 -7.26%
364 -7.28%
365 -7.30%
366 -7.32%
367 -7.34%

Final Ranking Score

88%

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.