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 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.

Nick Morrison's avatar

Nick Morrison

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

88.34%

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 1548 days 91%
Alice Ormandy 9/10 1570 days 100%
Manu Liberta 10/10 1615 days 98%
Bram Hoonhout 8/10 1621 days 92%
Sarah 10/10 1642 days 96%
Robertoi 9/10 1660 days 95%
Charly 9/10 1865 days 84%
Liam King 9/10 1877 days 83%
Clare Holden 10/10 1885 days 83%
Oliver Schatz 10/10 1912 days 81%
Nick Young 10/10 1917 days 81%
Lisa 8/10 1931 days 76%
Josephine 7/10 1947 days 71%
Markus Delinsky 8/10 2284 days 58%
Hubert 10/10 2356 days 57%
Anja Weppler 7/10 2590 days 40%
Sandra Frischmann 9/10 2620 days 43%
Simon Galpin 9/10 2621 days 43%
Kletter 9/10 2980 days 24%
Jeanne Moustier 9/10 3029 days 21%
Michael Kretzschmar 10/10 3064 days 19%
Lydia Holleman 9/10 3069 days 19%
John 9/10 3071 days 19%
Jon Barratt 9/10 3084 days 18%
Kali Lohman 8/10 3094 days 16%
Stuart Arrol 9/10 3318 days 5%
melemele 9/10 3322 days 5%
Simon Rawlinson 9/10 3334 days 5%
Jill Homewood 10/10 3346 days 4%
Signe Kaspersen 7/10 3347 days 2%
Robert Steendijk 7/10 3348 days 2%
Jaap & Susanne 7/10 3362 days 2%
Aridne Giraud 8/10 3365 days 2%
Nora 9/10 3366 days 3%
Andy Bridgman 7/10 3367 days 1%
Nikki Bentley 9/10 3368 days 3%
Filsack 8/10 3374 days 2%
Herbert 7/10 3395 days 0%
Stephane Lebel 10/10 3692 days 15%
Florian 9/10 3709 days 15%
Antoine Van Hoovled 9/10 3709 days 15%
K Dahmer 10/10 3712 days 15%
Julia 9/10 3717 days 15%
WeddingMaven 10/10 3719 days 15%
Kasia Robshaw 9/10 3723 days 15%
Roger Lows 9/10 3738 days 15%
Jochen 7/10 3745 days 13%
VisualDelight 10/10 3931 days 15%
John Cox 9/10 4090 days 15%
Susi Schoetzler 10/10 4132 days 15%
Simon Bartholomew 10/10 4186 days 15%
Raewyn 10/10 4415 days 15%
Ger 9/10 4416 days 15%
jjakkeren 7/10 4418 days 13%
PaulC 9/10 4424 days 15%
Dave Ashun 9/10 4425 days 15%
ChristinaV 8/10 4427 days 14%
JanW 3/10 4430 days 9%
KatrinS 8/10 4430 days 14%
Christian Moll 7/10 4434 days 13%
Peter 8/10 4434 days 14%
Charles 8/10 4450 days 14%
JennyD1 7/10 4524 days 13%
bobmcg 10/10 4531 days 15%
Stephanie Schikora 10/10 4561 days 15%
Paul 7/10 4595 days 13%
Suyin 10/10 4615 days 15%
Tom Ben 10/10 4789 days 15%
Anja Kunert 9/10 4815 days 15%
Zurcher Marco 10/10 4845 days 15%
Sandra Gustafson 7/10 4860 days 13%
Julie 9/10 5104 days 15%
Chatin Perrier 10/10 5155 days 15%
Pete 9/10 5172 days 15%

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

-3.00% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 82 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 -2.96%
198 -2.97%
199 -2.99%
200 -3.00%
201 -3.02%
202 -3.03%
203 -3.05%

Final Ranking Score

85%

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.