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
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
87.82%
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 | 474 days |  |
77.28 | 100% |
| Alice Ormandy | 9/10 | 496 days | |
73.22 | 95% |
| Manu Liberta | 10/10 | 541 days | |
64.35 | 83% |
| Bram Hoonhout | 8/10 | 547 days | |
63.1 | 81% |
| Sarah | 10/10 | 568 days | |
58.81 | 76% |
| Robertoi | 9/10 | 586 days | |
55.27 | 71% |
| Charly | 9/10 | 791 days | |
23.57 | 30% |
| Liam King | 9/10 | 803 days | |
22.21 | 28% |
| Clare Holden | 10/10 | 811 days | |
21.34 | 27% |
| Oliver Schatz | 10/10 | 838 days | |
18.56 | 23% |
| Nick Young | 10/10 | 843 days | |
18.08 | 22% |
| Lisa | 8/10 | 857 days | |
16.77 | 21% |
| Josephine | 7/10 | 873 days | |
15.37 | 19% |
| Markus Delinsky | 8/10 | 1210 days | |
5.81 | 6% |
| Hubert | 10/10 | 1282 days | |
5.69 | 6% |
| Anja Weppler | 7/10 | 1516 days | |
5.31 | 6% |
| Sandra Frischmann | 9/10 | 1546 days | |
5.26 | 6% |
| Simon Galpin | 9/10 | 1547 days | |
5.26 | 6% |
| Kletter | 9/10 | 1906 days | |
4.67 | 5% |
| Jeanne Moustier | 9/10 | 1955 days | |
4.59 | 5% |
| Michael Kretzschmar | 10/10 | 1990 days | |
4.53 | 5% |
| Lydia Holleman | 9/10 | 1995 days | |
4.52 | 5% |
| John | 9/10 | 1997 days | |
4.52 | 5% |
| Jon Barratt | 9/10 | 2010 days | |
4.5 | 5% |
| Kali Lohman | 8/10 | 2020 days | |
4.48 | 4% |
| Stuart Arrol | 9/10 | 2243 days | |
4.11 | 4% |
| melemele | 9/10 | 2248 days | 3.42 | 3% | |
| Simon Rawlinson | 9/10 | 2260 days | |
4.08 | 4% |
| Jill Homewood | 10/10 | 2272 days | |
4.07 | 4% |
| Signe Kaspersen | 7/10 | 2273 days | |
4.06 | 4% |
| Robert Steendijk | 7/10 | 2274 days | |
4.06 | 4% |
| Jaap & Susanne | 7/10 | 2288 days | |
4.04 | 4% |
| Aridne Giraud | 8/10 | 2291 days | |
4.03 | 4% |
| Nora | 9/10 | 2292 days | |
4.03 | 4% |
| Andy Bridgman | 7/10 | 2293 days | |
4.03 | 4% |
| Nikki Bentley | 9/10 | 2294 days | |
4.03 | 4% |
| Filsack | 8/10 | 2300 days | |
4.02 | 4% |
| Herbert | 7/10 | 2321 days | |
3.98 | 4% |
| Stephane Lebel | 10/10 | 2618 days | |
3.5 | 3% |
| Florian | 9/10 | 2635 days | |
3.47 | 3% |
| Antoine Van Hoovled | 9/10 | 2635 days | |
3.47 | 3% |
| K Dahmer | 10/10 | 2638 days | |
3.46 | 3% |
| Julia | 9/10 | 2643 days | |
3.46 | 3% |
| WeddingMaven | 10/10 | 2645 days | 2.88 | 2% | |
| Kasia Robshaw | 9/10 | 2649 days | |
3.45 | 3% |
| Roger Lows | 9/10 | 2664 days | |
3.42 | 3% |
| Jochen | 7/10 | 2671 days | |
3.41 | 3% |
| VisualDelight | 10/10 | 2856 days | 2.59 | 2% | |
| John Cox | 9/10 | 3016 days | |
2.84 | 2% |
| Susi Schoetzler | 10/10 | 3058 days | |
2.77 | 2% |
| Simon Bartholomew | 10/10 | 3112 days | |
2.68 | 2% |
| Raewyn | 10/10 | 3341 days | |
2.31 | 2% |
| Ger | 9/10 | 3342 days | |
2.31 | 2% |
| jjakkeren | 7/10 | 3344 days | |
2.3 | 2% |
| PaulC | 9/10 | 3350 days | |
2.29 | 2% |
| Dave Ashun | 9/10 | 3351 days | |
2.29 | 2% |
| ChristinaV | 8/10 | 3353 days | |
2.29 | 2% |
| JanW | 3/10 | 3356 days | |
2.11 | 1% |
| KatrinS | 8/10 | 3356 days | |
2.28 | 2% |
| Christian Moll | 7/10 | 3360 days | |
2.28 | 2% |
| Peter | 8/10 | 3360 days | |
2.28 | 2% |
| Charles | 8/10 | 3376 days | |
2.25 | 2% |
| JennyD1 | 7/10 | 3450 days | |
2.13 | 1% |
| bobmcg | 10/10 | 3456 days | 1.77 | 1% | |
| Stephanie Schikora | 10/10 | 3486 days | 1.72 | 1% | |
| Paul | 7/10 | 3521 days | |
2.01 | 1% |
| Suyin | 10/10 | 3541 days | |
1.98 | 1% |
| Tom Ben | 10/10 | 3715 days | |
1.69 | 1% |
| Anja Kunert | 9/10 | 3741 days | |
1.65 | 1% |
| Zurcher Marco | 10/10 | 3771 days | |
1.6 | 1% |
| Sandra Gustafson | 7/10 | 3786 days | |
1.58 | 1% |
| Julie | 9/10 | 4029 days | |
1.18 | 0% |
| Chatin Perrier | 10/10 | 4080 days | |
1.09 | 0% |
| Pete | 9/10 | 4098 days | |
1.06 | 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
-3.72% 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 364 days.
The Southern Discoveries / Milford Sound Red Boats experience has been adjusted for 186 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 183 | -3.66% |
| 184 | -3.68% |
| 185 | -3.70% |
| 186 | -3.72% |
| 187 | -3.74% |
| 188 | -3.76% |
| 189 | -3.78% |
| … | … |
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.