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.
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
88.13%
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 | Face-to-Face | Weight | Relative Weight |
|---|---|---|---|---|---|
| C Clarke | 7/10 | 1083 days |  |
4.57 | 92% |
| Alice Ormandy | 9/10 | 1105 days | |
4.98 | 100% |
| Manu Liberta | 10/10 | 1150 days | |
4.89 | 98% |
| Bram Hoonhout | 8/10 | 1156 days | |
4.64 | 93% |
| Sarah | 10/10 | 1177 days | |
4.84 | 97% |
| Robertoi | 9/10 | 1195 days | |
4.8 | 96% |
| Charly | 9/10 | 1400 days | |
4.4 | 88% |
| Liam King | 9/10 | 1412 days | |
4.38 | 88% |
| Clare Holden | 10/10 | 1420 days | |
4.36 | 88% |
| Oliver Schatz | 10/10 | 1447 days | |
4.31 | 87% |
| Nick Young | 10/10 | 1452 days | |
4.3 | 86% |
| Lisa | 8/10 | 1466 days | |
4.06 | 82% |
| Josephine | 7/10 | 1482 days | |
3.86 | 78% |
| Markus Delinsky | 8/10 | 1819 days | |
3.4 | 68% |
| Hubert | 10/10 | 1891 days | |
3.44 | 69% |
| Anja Weppler | 7/10 | 2125 days | |
2.72 | 55% |
| Sandra Frischmann | 9/10 | 2155 days | |
2.93 | 59% |
| Simon Galpin | 9/10 | 2156 days | |
2.92 | 59% |
| Kletter | 9/10 | 2515 days | |
2.22 | 45% |
| Jeanne Moustier | 9/10 | 2564 days | |
2.13 | 43% |
| Michael Kretzschmar | 10/10 | 2599 days | |
2.06 | 41% |
| Lydia Holleman | 9/10 | 2604 days | |
2.05 | 41% |
| John | 9/10 | 2606 days | |
2.04 | 41% |
| Jon Barratt | 9/10 | 2619 days | |
2.02 | 41% |
| Kali Lohman | 8/10 | 2629 days | |
1.9 | 38% |
| Stuart Arrol | 9/10 | 2853 days | |
1.56 | 31% |
| melemele | 9/10 | 2857 days | 1.55 | 31% | |
| Simon Rawlinson | 9/10 | 2869 days | |
1.53 | 31% |
| Jill Homewood | 10/10 | 2881 days | |
1.5 | 30% |
| Signe Kaspersen | 7/10 | 2882 days | |
1.37 | 27% |
| Robert Steendijk | 7/10 | 2883 days | |
1.37 | 27% |
| Jaap & Susanne | 7/10 | 2897 days | |
1.34 | 27% |
| Aridne Giraud | 8/10 | 2900 days | |
1.39 | 28% |
| Nora | 9/10 | 2901 days | |
1.47 | 29% |
| Andy Bridgman | 7/10 | 2902 days | |
1.33 | 27% |
| Nikki Bentley | 9/10 | 2903 days | |
1.46 | 29% |
| Filsack | 8/10 | 2909 days | |
1.38 | 28% |
| Herbert | 7/10 | 2930 days | |
1.28 | 26% |
| Stephane Lebel | 10/10 | 3227 days | |
0.83 | 17% |
| Florian | 9/10 | 3244 days | |
0.79 | 16% |
| Antoine Van Hoovled | 9/10 | 3244 days | |
0.79 | 16% |
| K Dahmer | 10/10 | 3247 days | |
0.79 | 16% |
| Julia | 9/10 | 3252 days | |
0.78 | 16% |
| WeddingMaven | 10/10 | 3254 days | 0.77 | 16% | |
| Kasia Robshaw | 9/10 | 3258 days | |
0.77 | 15% |
| Roger Lows | 9/10 | 3273 days | |
0.74 | 15% |
| Jochen | 7/10 | 3280 days | |
0.66 | 13% |
| VisualDelight | 10/10 | 3466 days | 0.36 | 7% | |
| John Cox | 9/10 | 3625 days | |
0.05 | 1% |
| Susi Schoetzler | 10/10 | 3667 days | |
0.0 | 0% |
| Simon Bartholomew | 10/10 | 3721 days | |
0.0 | 0% |
| Raewyn | 10/10 | 3950 days | |
0.0 | 0% |
| Ger | 9/10 | 3951 days | |
0.0 | 0% |
| jjakkeren | 7/10 | 3953 days | |
0.0 | 0% |
| PaulC | 9/10 | 3959 days | |
0.0 | 0% |
| Dave Ashun | 9/10 | 3960 days | |
0.0 | 0% |
| ChristinaV | 8/10 | 3962 days | |
0.0 | 0% |
| JanW | 3/10 | 3965 days | |
0.0 | 0% |
| KatrinS | 8/10 | 3965 days | |
0.0 | 0% |
| Christian Moll | 7/10 | 3969 days | |
0.0 | 0% |
| Peter | 8/10 | 3969 days | |
0.0 | 0% |
| Charles | 8/10 | 3985 days | |
0.0 | 0% |
| JennyD1 | 7/10 | 4059 days | |
0.0 | 0% |
| bobmcg | 10/10 | 4066 days | 0.0 | 0% | |
| Stephanie Schikora | 10/10 | 4096 days | 0.0 | 0% | |
| Paul | 7/10 | 4130 days | |
0.0 | 0% |
| Suyin | 10/10 | 4150 days | |
0.0 | 0% |
| Tom Ben | 10/10 | 4324 days | |
0.0 | 0% |
| Anja Kunert | 9/10 | 4350 days | |
0.0 | 0% |
| Zurcher Marco | 10/10 | 4380 days | |
0.0 | 0% |
| Sandra Gustafson | 7/10 | 4395 days | |
0.0 | 0% |
| Julie | 9/10 | 4639 days | |
0.0 | 0% |
| Chatin Perrier | 10/10 | 4690 days | |
0.0 | 0% |
| Pete | 9/10 | 4707 days | |
0.0 | 0% |
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
-3.98% Adjustment
There may be an adjustment if an experience hasn't received any reviews within the last 60 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 199 days.
The Southern Discoveries / Milford Sound Red Boats experience has been adjusted for 199 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 196 | -3.92% |
| 197 | -3.94% |
| 198 | -3.96% |
| 199 | -3.98% |
| 200 | -4.00% |
| 201 | -4.02% |
| 202 | -4.04% |
| … | … |
Final Ranking Score
84%
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.