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 Norwest Adventures.

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

Norwest Adventures

Valid Reviews

34 Valid Reviews

The Norwest Adventures experience has a total of 35 reviews. There are 34 valid reviews that are included when calculating the ranking score and 1 invalid review 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 34 valid reviews:

Rating Count Percentage
10/10 20
9/10 6
8/10 1
7/10 4
6/10 1
5/10 1
4/10 1
3/10 0
2/10 0
1/10 0

89.71% Average

The raw data average (mean) for all the Norwest Adventures valid reviews is 89.71% and is based on 34 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

19 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 34 valid reviews, the experience has 19 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 19 face-to-face reviews:

Rating Count Percentage
10/10 11
9/10 4
8/10 1
7/10 2
6/10 0
5/10 0
4/10 1
3/10 0
2/10 0
1/10 0

90.53% Average

The raw data average (mean) for all the Norwest Adventures face-to-face reviews is 90.53% and is based on 19 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

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
Mike Fricker 5/10 844 days 100%
S H 10/10 1209 days 39%
Mietta Feery 9/10 1430 days 35%
Michelle Dalgliesh 10/10 1604 days 33%
Karin Karlsson 10/10 1776 days 30%
Katharina Block 8/10 2144 days 23%
Annika Fletemeyer 9/10 2144 days 24%
techno69 10/10 2305 days 21%
Yiying Zhang 10/10 2366 days 20%
Markus Eckert 10/10 2515 days 18%
Philip Schumann 10/10 2515 days 18%
Jason MacLeod 7/10 2547 days 16%
Kim 10/10 2853 days 12%
Ingeborg Ruysscher 10/10 2943 days 11%
Lydia Holleman 10/10 2965 days 11%
Stephanie Levepue 9/10 2978 days 10%
Loesje 7/10 3065 days 8%
Sethkins 10/10 3249 days 6%
Stephanie Wirthlin 4/10 3272 days 4%
hands 6/10 3309 days 4%
Gunter 10/10 3598 days 0%
Seonaid 10/10 3615 days 0%
Suz 10/10 3705 days 8%
Anna 10/10 3898 days 8%
Jeannot Robert 10/10 4018 days 8%
rosil 7/10 4314 days 7%
Martina Bumiller 10/10 4319 days 8%
Stefanie 7/10 4339 days 7%
Nikki Annand 9/10 4435 days 8%
Linda and Peter 9/10 4693 days 8%
Klaus Uhl 10/10 4697 days 8%
Fung 10/10 4706 days 8%
Charles Price 10/10 4718 days 8%
Sue 9/10 4718 days 8%


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 Norwest Adventures experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.11% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 47 days. However the Norwest Adventures 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 Norwest Adventures experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.05%
198 -4.07%
199 -4.09%
200 -4.11%
201 -4.13%
202 -4.15%
203 -4.17%

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.