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

57 Valid Reviews

The Akaroa Harbour Nature Cruises experience has a total of 57 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 57 valid reviews:

Rating Count Percentage
10/10 13
23%
9/10 19
33%
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%

82.98% Average

The raw data average (mean) for all the Akaroa Harbour Nature Cruises valid reviews is 82.98% and is based on 57 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 57 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

86.19%

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 Relative Weight
Stefano Clerici 10/10 1079 days 100%
Sue Milne 10/10 1570 days 79%
Fran and Ben 10/10 1581 days 79%
Patricia 8/10 1907 days 61%
Ceri Eaton 9/10 1936 days 64%
Thomas Zilio 4/10 2679 days 24%
JoMary Smith 9/10 2721 days 31%
Marco Schmidt 10/10 3006 days 19%
Christian Schumacher 10/10 3006 days 19%
Karin Genyn 10/10 3103 days 14%
N Zitscher 5/10 3120 days 9%
Peter Harden 9/10 3122 days 14%
Jenny McTigue 8/10 3402 days 1%
Mike & Jennie 8/10 3403 days 1%
Stefes Wencke 10/10 3405 days 2%
Johan Kroese 9/10 3432 days 1%
Herbert 8/10 3434 days 0%
Michael 9/10 3741 days 13%
Richard Dudfield 10/10 3744 days 13%
Louise van der Hyden 9/10 3756 days 13%
elmoandjoey 10/10 3848 days 13%
Tim 10/10 3878 days 13%
Conny 9/10 4057 days 13%
Victoria Slater 7/10 4097 days 11%
Risch & Seybold 9/10 4105 days 13%
Schumacher 9/10 4110 days 13%
Greg Kennedy 9/10 4170 days 13%
csziegler 10/10 4197 days 13%
stephenb 8/10 4207 days 12%
carsteng 7/10 4207 days 11%
Kathrin Thomas 9/10 4225 days 13%
james masura 10/10 4243 days 13%
Steve Drake 1/10 4304 days 7%
Andrea 7/10 4377 days 11%
stephen 9/10 4459 days 13%
NatasjaV 8/10 4475 days 12%
JimmyK 8/10 4475 days 12%
JohannaB 7/10 4476 days 11%
Peter Bowen-Simpkins 9/10 4477 days 13%
eatc 9/10 4488 days 13%
Daniel 3/10 4494 days 8%
schenk 8/10 4508 days 12%
groenewold 8/10 4522 days 12%
Karen 8/10 4529 days 12%
Ducolq 7/10 4530 days 11%
Rebekka 5/10 4530 days 9%
Mary Hamilton 10/10 4622 days 13%
Esther 8/10 4664 days 12%
Jim Summers 8/10 4706 days 12%
Stewart 8/10 4840 days 12%
angela 9/10 4840 days 13%
Bauer 7/10 4855 days 11%
Kenneth and Mette 8/10 4857 days 12%
Knol 9/10 4858 days 13%
Dorris Schwarz 9/10 4903 days 13%
Eleanor Adams 9/10 4949 days 13%
Fred 9/10 5187 days 13%

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

-2.23% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 115 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 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.

The Akaroa Harbour Nature Cruises experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -2.20%
198 -2.21%
199 -2.22%
200 -2.23%
201 -2.24%
202 -2.26%
203 -2.27%

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.