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
88.21%
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 | 1323 days |  |
4.14 | 92% |
| Alice Ormandy | 9/10 | 1345 days | |
4.51 | 100% |
| Manu Liberta | 10/10 | 1390 days | |
4.42 | 98% |
| Bram Hoonhout | 8/10 | 1396 days | |
4.19 | 93% |
| Sarah | 10/10 | 1417 days | |
4.37 | 97% |
| Robertoi | 9/10 | 1435 days | |
4.33 | 96% |
| Charly | 9/10 | 1640 days | |
3.93 | 87% |
| Liam King | 9/10 | 1652 days | |
3.91 | 87% |
| Clare Holden | 10/10 | 1660 days | |
3.89 | 86% |
| Oliver Schatz | 10/10 | 1687 days | |
3.84 | 85% |
| Nick Young | 10/10 | 1692 days | |
3.83 | 85% |
| Lisa | 8/10 | 1706 days | |
3.61 | 80% |
| Josephine | 7/10 | 1722 days | |
3.43 | 76% |
| Markus Delinsky | 8/10 | 2059 days | |
2.96 | 66% |
| Hubert | 10/10 | 2131 days | |
2.97 | 66% |
| Anja Weppler | 7/10 | 2365 days | |
2.29 | 51% |
| Sandra Frischmann | 9/10 | 2395 days | |
2.46 | 54% |
| Simon Galpin | 9/10 | 2396 days | |
2.45 | 54% |
| Kletter | 9/10 | 2755 days | |
1.75 | 39% |
| Jeanne Moustier | 9/10 | 2804 days | |
1.66 | 37% |
| Michael Kretzschmar | 10/10 | 2839 days | |
1.59 | 35% |
| Lydia Holleman | 9/10 | 2844 days | |
1.58 | 35% |
| John | 9/10 | 2846 days | |
1.57 | 35% |
| Jon Barratt | 9/10 | 2859 days | |
1.55 | 34% |
| Kali Lohman | 8/10 | 2869 days | |
1.45 | 32% |
| Stuart Arrol | 9/10 | 3093 days | |
1.09 | 24% |
| melemele | 9/10 | 3097 days | 1.08 | 24% | |
| Simon Rawlinson | 9/10 | 3109 days | |
1.06 | 23% |
| Jill Homewood | 10/10 | 3121 days | |
1.04 | 23% |
| Signe Kaspersen | 7/10 | 3122 days | |
0.94 | 21% |
| Robert Steendijk | 7/10 | 3123 days | |
0.94 | 21% |
| Jaap & Susanne | 7/10 | 3137 days | |
0.91 | 20% |
| Aridne Giraud | 8/10 | 3140 days | |
0.95 | 21% |
| Nora | 9/10 | 3141 days | |
1.0 | 22% |
| Andy Bridgman | 7/10 | 3142 days | |
0.9 | 20% |
| Nikki Bentley | 9/10 | 3143 days | |
0.99 | 22% |
| Filsack | 8/10 | 3149 days | |
0.93 | 21% |
| Herbert | 7/10 | 3170 days | |
0.85 | 19% |
| Stephane Lebel | 10/10 | 3467 days | |
0.36 | 8% |
| Florian | 9/10 | 3484 days | |
0.32 | 7% |
| Antoine Van Hoovled | 9/10 | 3484 days | |
0.32 | 7% |
| K Dahmer | 10/10 | 3487 days | |
0.32 | 7% |
| Julia | 9/10 | 3492 days | |
0.31 | 7% |
| WeddingMaven | 10/10 | 3494 days | 0.31 | 7% | |
| Kasia Robshaw | 9/10 | 3498 days | |
0.3 | 7% |
| Roger Lows | 9/10 | 3513 days | |
0.27 | 6% |
| Jochen | 7/10 | 3520 days | |
0.23 | 5% |
| VisualDelight | 10/10 | 3706 days | 0.0 | 0% | |
| John Cox | 9/10 | 3865 days | |
0.0 | 0% |
| Susi Schoetzler | 10/10 | 3907 days | |
0.0 | 0% |
| Simon Bartholomew | 10/10 | 3961 days | |
0.0 | 0% |
| Raewyn | 10/10 | 4190 days | |
0.0 | 0% |
| Ger | 9/10 | 4191 days | |
0.0 | 0% |
| jjakkeren | 7/10 | 4193 days | |
0.0 | 0% |
| PaulC | 9/10 | 4199 days | |
0.0 | 0% |
| Dave Ashun | 9/10 | 4200 days | |
0.0 | 0% |
| ChristinaV | 8/10 | 4202 days | |
0.0 | 0% |
| JanW | 3/10 | 4205 days | |
0.0 | 0% |
| KatrinS | 8/10 | 4205 days | |
0.0 | 0% |
| Christian Moll | 7/10 | 4209 days | |
0.0 | 0% |
| Peter | 8/10 | 4209 days | |
0.0 | 0% |
| Charles | 8/10 | 4225 days | |
0.0 | 0% |
| JennyD1 | 7/10 | 4299 days | |
0.0 | 0% |
| bobmcg | 10/10 | 4306 days | 0.0 | 0% | |
| Stephanie Schikora | 10/10 | 4336 days | 0.0 | 0% | |
| Paul | 7/10 | 4370 days | |
0.0 | 0% |
| Suyin | 10/10 | 4390 days | |
0.0 | 0% |
| Tom Ben | 10/10 | 4564 days | |
0.0 | 0% |
| Anja Kunert | 9/10 | 4590 days | |
0.0 | 0% |
| Zurcher Marco | 10/10 | 4620 days | |
0.0 | 0% |
| Sandra Gustafson | 7/10 | 4635 days | |
0.0 | 0% |
| Julie | 9/10 | 4879 days | |
0.0 | 0% |
| Chatin Perrier | 10/10 | 4930 days | |
0.0 | 0% |
| Pete | 9/10 | 4947 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
-3.12% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 72 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 | -3.07% |
| 198 | -3.09% |
| 199 | -3.10% |
| 200 | -3.12% |
| 201 | -3.13% |
| 202 | -3.15% |
| 203 | -3.16% |
| … | … |
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.