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 Akaroa Harbour Nature 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

Akaroa Harbour Nature Cruises

Valid Reviews

56 Valid Reviews

The Akaroa Harbour Nature Cruises experience has a total of 56 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 56 valid reviews:

Rating Count Percentage
10/10 12
21%
9/10 19
34%
8/10 14
25%
7/10 6
11%
6/10 0
0%
5/10 2
4%
4/10 1
2%
3/10 1
2%
2/10 0
0%
1/10 1
2%

82.68% Average

The raw data average (mean) for all the Akaroa Harbour Nature Cruises valid reviews is 82.68% and is based on 56 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

48 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 56 valid reviews, the experience has 48 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 48 face-to-face reviews:

Rating Count Percentage
10/10 8
17%
9/10 17
35%
8/10 14
29%
7/10 6
13%
6/10 0
0%
5/10 1
2%
4/10 1
2%
3/10 1
2%
2/10 0
0%
1/10 0
0%

83.13% Average

The raw data average (mean) for all the Akaroa Harbour Nature Cruises face-to-face reviews is 83.13% and is based on 48 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

90.95%

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
Sue Milne 10/10 452 days true 81.15 100%
Fran and Ben 10/10 463 days true 79.24 98%
Patricia 8/10 789 days true 23.81 28%
Ceri Eaton 9/10 818 days true 20.59 24%
Thomas Zilio 4/10 1561 days true 4.93 5%
JoMary Smith 9/10 1603 days 4.3 4%
Marco Schmidt 10/10 1888 days true 4.7 4%
Christian Schumacher 10/10 1888 days true 4.7 4%
Karin Genyn 10/10 1985 days true 4.54 4%
N Zitscher 5/10 2002 days 3.76 3%
Peter Harden 9/10 2004 days true 4.51 4%
Jenny McTigue 8/10 2284 days true 4.05 4%
Mike & Jennie 8/10 2285 days true 4.04 4%
Stefes Wencke 10/10 2287 days true 4.04 4%
Johan Kroese 9/10 2314 days true 4.0 4%
Herbert 8/10 2316 days true 3.99 4%
Michael 9/10 2623 days true 3.49 3%
Richard Dudfield 10/10 2626 days true 3.48 3%
Louise van der Hyden 9/10 2638 days true 3.46 3%
elmoandjoey 10/10 2730 days 2.76 2%
Tim 10/10 2760 days 2.72 2%
Conny 9/10 2939 days true 2.97 2%
Victoria Slater 7/10 2979 days true 2.9 2%
Risch & Seybold 9/10 2987 days true 2.89 2%
Schumacher 9/10 2992 days true 2.88 2%
Greg Kennedy 9/10 3052 days true 2.78 2%
csziegler 10/10 3079 days true 2.74 2%
stephenb 8/10 3089 days true 2.72 2%
carsteng 7/10 3089 days true 2.72 2%
Kathrin Thomas 9/10 3107 days true 2.69 2%
james masura 10/10 3125 days 2.22 1%
Steve Drake 1/10 3186 days 1.82 1%
Andrea 7/10 3259 days true 2.44 2%
stephen 9/10 3341 days true 2.31 1%
NatasjaV 8/10 3357 days true 2.28 1%
JimmyK 8/10 3357 days true 2.28 1%
JohannaB 7/10 3358 days true 2.28 1%
Peter Bowen-Simpkins 9/10 3359 days true 2.28 1%
eatc 9/10 3370 days 1.88 1%
Daniel 3/10 3376 days true 2.08 1%
schenk 8/10 3390 days true 2.23 1%
groenewold 8/10 3404 days true 2.2 1%
Karen 8/10 3411 days true 2.19 1%
Ducolq 7/10 3412 days true 2.19 1%
Rebekka 5/10 3412 days true 2.19 1%
Mary Hamilton 10/10 3504 days 1.7 1%
Esther 8/10 3546 days true 1.97 1%
Jim Summers 8/10 3588 days true 1.9 1%
Stewart 8/10 3722 days true 1.68 1%
angela 9/10 3722 days true 1.68 1%
Bauer 7/10 3737 days true 1.66 1%
Kenneth and Mette 8/10 3739 days true 1.65 1%
Knol 9/10 3740 days true 1.65 1%
Dorris Schwarz 9/10 3785 days true 1.58 1%
Eleanor Adams 9/10 3831 days true 1.5 0%
Fred 9/10 4069 days true 1.11 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 Akaroa Harbour Nature Cruises experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-6.68% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the Akaroa Harbour Nature 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 Akaroa Harbour Nature Cruises experience has been adjusted for 334 days. Adjustments are according to the following table.

Days Adjustment
331 -6.62%
332 -6.64%
333 -6.66%
334 -6.68%
335 -6.70%
336 -6.72%
337 -6.74%

Final Ranking Score

84%

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.