Ranking Score Explained

Kia ora 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 Nelson Tours & Travel 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.

Cymen Crick's avatar

Cymen Crick

Rankers Owner

Nelson Tours & Travel Ltd

Valid Reviews

26 Valid Reviews

The Nelson Tours & Travel Ltd experience has a total of 42 reviews. There are 26 valid reviews that are included when calculating the ranking score and 16 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 26 valid reviews:

Rating Count Percentage
10/10 19
9/10 3
8/10 3
7/10 1
6/10 0
5/10 0
4/10 0
3/10 0
2/10 0
1/10 0

95.38% Average

The raw data average (mean) for all the Nelson Tours & Travel Ltd valid reviews is 95.38% and is based on 26 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
Jillian 10/10 3085 days 100%
Pascale 10/10 3236 days 71%
Kevin Fitzsimons 9/10 3236 days 71%
Jude Laurence 10/10 3236 days 71%
Craig Terry 10/10 3236 days 71%
Rach 10/10 3236 days 71%
marissa h 10/10 3236 days 71%
julie maki 10/10 3266 days 65%
Janene Chaplin 10/10 3266 days 65%
Blackie 10/10 3297 days 59%
Jeff Johnson 10/10 3297 days 59%
Grant OConnell 8/10 3328 days 50%
Dan Palmer 10/10 3419 days 35%
Dia Stehling 8/10 3450 days 27%
Nathanwill5 9/10 3509 days 18%
Michael Buchanan 10/10 3509 days 18%
Karen Ande 10/10 3509 days 18%
rnicks 10/10 3540 days 12%
Fiona Oliver 8/10 3570 days 5%
hob79 10/10 3601 days 0%
winesus 7/10 3723 days 81%
GRAYJOAN 10/10 4209 days 90%
sebey 10/10 4515 days 90%
NZJenJen 9/10 4880 days 90%
evi21 10/10 4995 days 90%
kari 10/10 5002 days 90%


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 Nelson Tours & Travel Ltd 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 117 days. However the Nelson Tours & Travel 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 Nelson Tours & Travel Ltd 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


The final ranking score once any adjustments, ratings, 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.