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 J G Sailing Adventures Ltd.

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

J G Sailing Adventures Ltd

Valid Reviews

30 Valid Reviews

The J G Sailing Adventures Ltd experience has a total of 30 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.

Within these 30 valid reviews, the experience has 2 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 30 valid reviews:

Rating Count Percentage
10/10 30
9/10 0
8/10 0
7/10 0
6/10 0
5/10 0
4/10 0
3/10 0
2/10 0
1/10 0

100.00% Average

The raw data average (mean) for all the J G Sailing Adventures Ltd valid reviews is 100.00% and is based on 30 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.

Weighted Average


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
Jean and Peter 10/10 2870 days 22%
Mitch47 10/10 3272 days 0%
Leanne Gullett 10/10 3272 days 0%
Christine Bilton 10/10 3272 days 0%
AHoffman 10/10 3669 days 33%
JSage 10/10 4003 days 33%
purplekate 10/10 4095 days 33%
ron wellbrook 10/10 4368 days 33%
Diana Greig 10/10 4399 days 33%
Ross Anderson 10/10 4399 days 33%
Claudia Gallur 10/10 4430 days 33%
rita 10/10 4539 days -18%
Nina Marcroft 10/10 4552 days 33%
Mike 10/10 4674 days 33%
yacht09 10/10 4674 days 33%
Penny Francis 10/10 4676 days 33%
phil_h 10/10 4684 days 33%
Arbuckles 10/10 4743 days 33%
Betsy Carstairs 10/10 4762 days 33%
cliff andrews 10/10 4763 days 33%
soraya 10/10 4768 days 33%
dsage 10/10 4772 days 33%
Merilyn Mason 10/10 4773 days 33%
detna855 10/10 4846 days 33%
Michael Taylor 10/10 5076 days 33%
NZ_Adventure 10/10 5089 days 33%
lianneb 10/10 5091 days 33%
baqfburns 10/10 5126 days 33%
Jarrod Smythe 10/10 5134 days 33%
Xanthe Mclean 10/10 5134 days 33%


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 J G Sailing Adventures Ltd experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.09% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 46 days. However the J G Sailing Adventures Ltd 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 J G Sailing Adventures Ltd experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.03%
198 -4.05%
199 -4.07%
200 -4.09%
201 -4.11%
202 -4.13%
203 -4.15%

Final Ranking Score


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.