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
87.04%
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 | 714 days |  |
33.6 | 100% |
| Alice Ormandy | 9/10 | 736 days | |
30.51 | 91% |
| Manu Liberta | 10/10 | 781 days | |
24.75 | 73% |
| Bram Hoonhout | 8/10 | 787 days | |
24.04 | 71% |
| Sarah | 10/10 | 808 days | |
21.66 | 64% |
| Robertoi | 9/10 | 826 days | |
19.76 | 58% |
| Charly | 9/10 | 1031 days | |
6.78 | 19% |
| Liam King | 9/10 | 1043 days | |
6.51 | 18% |
| Clare Holden | 10/10 | 1051 days | |
6.37 | 17% |
| Oliver Schatz | 10/10 | 1078 days | |
6.05 | 16% |
| Nick Young | 10/10 | 1083 days | |
6.03 | 16% |
| Lisa | 8/10 | 1097 days | |
6.0 | 16% |
| Josephine | 7/10 | 1113 days | |
5.97 | 16% |
| Markus Delinsky | 8/10 | 1450 days | |
5.42 | 14% |
| Hubert | 10/10 | 1522 days | |
5.3 | 14% |
| Anja Weppler | 7/10 | 1756 days | |
4.91 | 13% |
| Sandra Frischmann | 9/10 | 1786 days | |
4.86 | 13% |
| Simon Galpin | 9/10 | 1787 days | |
4.86 | 13% |
| Kletter | 9/10 | 2146 days | |
4.27 | 11% |
| Jeanne Moustier | 9/10 | 2195 days | |
4.19 | 11% |
| Michael Kretzschmar | 10/10 | 2230 days | |
4.13 | 11% |
| Lydia Holleman | 9/10 | 2235 days | |
4.13 | 10% |
| John | 9/10 | 2237 days | |
4.12 | 10% |
| Jon Barratt | 9/10 | 2250 days | |
4.1 | 10% |
| Kali Lohman | 8/10 | 2260 days | |
4.08 | 10% |
| Stuart Arrol | 9/10 | 2484 days | |
3.72 | 9% |
| melemele | 9/10 | 2488 days | 3.09 | 7% | |
| Simon Rawlinson | 9/10 | 2500 days | |
3.69 | 9% |
| Jill Homewood | 10/10 | 2512 days | |
3.67 | 9% |
| Signe Kaspersen | 7/10 | 2513 days | |
3.67 | 9% |
| Robert Steendijk | 7/10 | 2514 days | |
3.67 | 9% |
| Jaap & Susanne | 7/10 | 2528 days | |
3.64 | 9% |
| Aridne Giraud | 8/10 | 2531 days | |
3.64 | 9% |
| Nora | 9/10 | 2532 days | |
3.64 | 9% |
| Andy Bridgman | 7/10 | 2533 days | |
3.64 | 9% |
| Nikki Bentley | 9/10 | 2534 days | |
3.63 | 9% |
| Filsack | 8/10 | 2540 days | |
3.62 | 9% |
| Herbert | 7/10 | 2561 days | |
3.59 | 9% |
| Stephane Lebel | 10/10 | 2858 days | |
3.1 | 7% |
| Florian | 9/10 | 2875 days | |
3.07 | 7% |
| Antoine Van Hoovled | 9/10 | 2875 days | |
3.07 | 7% |
| K Dahmer | 10/10 | 2878 days | |
3.07 | 7% |
| Julia | 9/10 | 2883 days | |
3.06 | 7% |
| WeddingMaven | 10/10 | 2885 days | 2.55 | 6% | |
| Kasia Robshaw | 9/10 | 2889 days | |
3.05 | 7% |
| Roger Lows | 9/10 | 2904 days | |
3.03 | 7% |
| Jochen | 7/10 | 2911 days | |
3.01 | 7% |
| VisualDelight | 10/10 | 3097 days | 2.26 | 5% | |
| John Cox | 9/10 | 3256 days | |
2.45 | 5% |
| Susi Schoetzler | 10/10 | 3298 days | |
2.38 | 5% |
| Simon Bartholomew | 10/10 | 3352 days | |
2.29 | 5% |
| Raewyn | 10/10 | 3581 days | |
1.91 | 4% |
| Ger | 9/10 | 3582 days | |
1.91 | 4% |
| jjakkeren | 7/10 | 3584 days | |
1.91 | 4% |
| PaulC | 9/10 | 3590 days | |
1.9 | 4% |
| Dave Ashun | 9/10 | 3591 days | |
1.9 | 4% |
| ChristinaV | 8/10 | 3593 days | |
1.89 | 4% |
| JanW | 3/10 | 3596 days | |
1.75 | 3% |
| KatrinS | 8/10 | 3596 days | |
1.89 | 4% |
| Christian Moll | 7/10 | 3600 days | |
1.88 | 4% |
| Peter | 8/10 | 3600 days | |
1.88 | 4% |
| Charles | 8/10 | 3616 days | |
1.86 | 4% |
| JennyD1 | 7/10 | 3690 days | |
1.73 | 3% |
| bobmcg | 10/10 | 3697 days | 1.44 | 2% | |
| Stephanie Schikora | 10/10 | 3727 days | 1.39 | 2% | |
| Paul | 7/10 | 3761 days | |
1.62 | 3% |
| Suyin | 10/10 | 3781 days | |
1.58 | 3% |
| Tom Ben | 10/10 | 3955 days | |
1.3 | 2% |
| Anja Kunert | 9/10 | 3981 days | |
1.26 | 2% |
| Zurcher Marco | 10/10 | 4011 days | |
1.21 | 2% |
| Sandra Gustafson | 7/10 | 4026 days | |
1.18 | 2% |
| Julie | 9/10 | 4270 days | |
0.78 | 0% |
| Chatin Perrier | 10/10 | 4321 days | |
0.7 | 0% |
| Pete | 9/10 | 4338 days | |
0.67 | 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
-7.28% 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 364 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 361 | -7.22% |
| 362 | -7.24% |
| 363 | -7.26% |
| 364 | -7.28% |
| 365 | -7.30% |
| 366 | -7.32% |
| 367 | -7.34% |
| … | … |
Final Ranking Score
80%
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.