Ranking Score Explained

G'day 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 Southern Discoveries / Milford Sound Red Boats.

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.

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Cymen Crick

Rankers Owner

Southern Discoveries / Milford Sound Red Boats

Valid Reviews

74 Valid Reviews

The Southern Discoveries / Milford Sound Red Boats experience has a total of 74 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 74 valid reviews:

Rating Count Percentage
10/10 21
28%
9/10 28
38%
8/10 10
14%
7/10 14
19%
6/10 0
0%
5/10 0
0%
4/10 0
0%
3/10 1
1%
2/10 0
0%
1/10 0
0%

86.89% Average

The raw data average (mean) for all the Southern Discoveries / Milford Sound Red Boats valid reviews is 86.89% and is based on 74 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

69 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 74 valid reviews, the experience has 69 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 69 face-to-face reviews:

Rating Count Percentage
10/10 17
25%
9/10 27
39%
8/10 10
14%
7/10 14
20%
6/10 0
0%
5/10 0
0%
4/10 0
0%
3/10 1
1%
2/10 0
0%
1/10 0
0%

86.09% Average

The raw data average (mean) for all the Southern Discoveries / Milford Sound Red Boats face-to-face reviews is 86.09% and is based on 69 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

87.77%

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
C Clarke 7/10 2011 days 92%
Alice Ormandy 9/10 2033 days 100%
Manu Liberta 10/10 2078 days 97%
Bram Hoonhout 8/10 2084 days 92%
Sarah 10/10 2105 days 95%
Robertoi 9/10 2123 days 94%
Charly 9/10 2328 days 81%
Liam King 9/10 2340 days 80%
Clare Holden 10/10 2348 days 79%
Oliver Schatz 10/10 2375 days 78%
Nick Young 10/10 2380 days 77%
Lisa 8/10 2394 days 72%
Josephine 7/10 2410 days 68%
Markus Delinsky 8/10 2747 days 50%
Hubert 10/10 2819 days 49%
Anja Weppler 7/10 3053 days 30%
Sandra Frischmann 9/10 3083 days 31%
Simon Galpin 9/10 3084 days 31%
Kletter 9/10 3443 days 8%
Jeanne Moustier 9/10 3492 days 5%
Michael Kretzschmar 10/10 3527 days 2%
Lydia Holleman 9/10 3532 days 2%
John 9/10 3534 days 2%
Jon Barratt 9/10 3547 days 1%
Kali Lohman 8/10 3557 days 0%
Stuart Arrol 9/10 3781 days 28%
melemele 9/10 3785 days 28%
Simon Rawlinson 9/10 3797 days 28%
Jill Homewood 10/10 3809 days 28%
Signe Kaspersen 7/10 3810 days 25%
Robert Steendijk 7/10 3811 days 25%
Jaap & Susanne 7/10 3825 days 25%
Aridne Giraud 8/10 3828 days 26%
Nora 9/10 3829 days 28%
Andy Bridgman 7/10 3830 days 25%
Nikki Bentley 9/10 3831 days 28%
Filsack 8/10 3837 days 26%
Herbert 7/10 3858 days 25%
Stephane Lebel 10/10 4155 days 28%
Florian 9/10 4172 days 28%
Antoine Van Hoovled 9/10 4172 days 28%
K Dahmer 10/10 4175 days 28%
Julia 9/10 4180 days 28%
WeddingMaven 10/10 4182 days 28%
Kasia Robshaw 9/10 4186 days 28%
Roger Lows 9/10 4201 days 28%
Jochen 7/10 4208 days 25%
VisualDelight 10/10 4394 days 28%
John Cox 9/10 4553 days 28%
Susi Schoetzler 10/10 4595 days 28%
Simon Bartholomew 10/10 4649 days 28%
Raewyn 10/10 4878 days 28%
Ger 9/10 4879 days 28%
jjakkeren 7/10 4881 days 25%
PaulC 9/10 4887 days 28%
Dave Ashun 9/10 4888 days 28%
ChristinaV 8/10 4891 days 26%
JanW 3/10 4893 days 20%
KatrinS 8/10 4893 days 26%
Christian Moll 7/10 4897 days 25%
Peter 8/10 4897 days 26%
Charles 8/10 4913 days 26%
JennyD1 7/10 4987 days 25%
bobmcg 10/10 4994 days 28%
Stephanie Schikora 10/10 5024 days 28%
Paul 7/10 5059 days 25%
Suyin 10/10 5079 days 28%
Tom Ben 10/10 5252 days 28%
Anja Kunert 9/10 5278 days 28%
Zurcher Marco 10/10 5308 days 28%
Sandra Gustafson 7/10 5323 days 25%
Julie 9/10 5567 days 28%
Chatin Perrier 10/10 5618 days 28%
Pete 9/10 5635 days 28%

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 Southern Discoveries / Milford Sound Red Boats experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-2.25% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 117 days. However the Southern Discoveries / Milford Sound Red Boats 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 Southern Discoveries / Milford Sound Red Boats experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -2.21%
198 -2.23%
199 -2.24%
200 -2.25%
201 -2.26%
202 -2.27%
203 -2.28%

Final Ranking Score

86%

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.