G'day, 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
87.86%
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 | 2964 days | 94% |
| Alice Ormandy | 9/10 | 2986 days | 100% |
| Manu Liberta | 10/10 | 3031 days | 97% |
| Bram Hoonhout | 8/10 | 3037 days | 94% |
| Sarah | 10/10 | 3058 days | 95% |
| Robertoi | 9/10 | 3076 days | 92% |
| Charly | 9/10 | 3281 days | 73% |
| Liam King | 9/10 | 3293 days | 72% |
| Clare Holden | 10/10 | 3301 days | 73% |
| Oliver Schatz | 10/10 | 3328 days | 70% |
| Nick Young | 10/10 | 3333 days | 70% |
| Lisa | 8/10 | 3347 days | 67% |
| Josephine | 7/10 | 3363 days | 61% |
| Markus Delinsky | 8/10 | 3700 days | 35% |
| Hubert | 10/10 | 3772 days | 30% |
| Anja Weppler | 7/10 | 4006 days | 6% |
| Sandra Frischmann | 9/10 | 4036 days | 6% |
| Simon Galpin | 9/10 | 4037 days | 6% |
| Kletter | 9/10 | 4396 days | 21% |
| Jeanne Moustier | 9/10 | 4445 days | 21% |
| Michael Kretzschmar | 10/10 | 4480 days | 21% |
| Lydia Holleman | 9/10 | 4485 days | 21% |
| John | 9/10 | 4487 days | 21% |
| Jon Barratt | 9/10 | 4500 days | 21% |
| Kali Lohman | 8/10 | 4510 days | 20% |
| Stuart Arrol | 9/10 | 4734 days | 21% |
| melemele | 9/10 | 4738 days | 21% |
| Simon Rawlinson | 9/10 | 4750 days | 21% |
| Jill Homewood | 10/10 | 4762 days | 21% |
| Signe Kaspersen | 7/10 | 4763 days | 18% |
| Robert Steendijk | 7/10 | 4764 days | 18% |
| Jaap & Susanne | 7/10 | 4778 days | 18% |
| Aridne Giraud | 8/10 | 4781 days | 20% |
| Nora | 9/10 | 4782 days | 21% |
| Andy Bridgman | 7/10 | 4783 days | 18% |
| Nikki Bentley | 9/10 | 4784 days | 21% |
| Filsack | 8/10 | 4790 days | 20% |
| Herbert | 7/10 | 4811 days | 18% |
| Stephane Lebel | 10/10 | 5108 days | 21% |
| Florian | 9/10 | 5125 days | 21% |
| Antoine Van Hoovled | 9/10 | 5125 days | 21% |
| K Dahmer | 10/10 | 5128 days | 21% |
| Julia | 9/10 | 5133 days | 21% |
| WeddingMaven | 10/10 | 5135 days | 21% |
| Kasia Robshaw | 9/10 | 5139 days | 21% |
| Roger Lows | 9/10 | 5154 days | 21% |
| Jochen | 7/10 | 5161 days | 18% |
| VisualDelight | 10/10 | 5347 days | 21% |
| John Cox | 9/10 | 5506 days | 21% |
| Susi Schoetzler | 10/10 | 5548 days | 21% |
| Simon Bartholomew | 10/10 | 5602 days | 21% |
| Raewyn | 10/10 | 5831 days | 21% |
| Ger | 9/10 | 5832 days | 21% |
| jjakkeren | 7/10 | 5834 days | 18% |
| PaulC | 9/10 | 5840 days | 21% |
| Dave Ashun | 9/10 | 5841 days | 21% |
| ChristinaV | 8/10 | 5843 days | 20% |
| JanW | 3/10 | 5846 days | 0% |
| KatrinS | 8/10 | 5846 days | 20% |
| Christian Moll | 7/10 | 5850 days | 18% |
| Peter | 8/10 | 5850 days | 20% |
| Charles | 8/10 | 5866 days | 20% |
| JennyD1 | 7/10 | 5940 days | 18% |
| bobmcg | 10/10 | 5947 days | 21% |
| Stephanie Schikora | 10/10 | 5977 days | 21% |
| Paul | 7/10 | 6011 days | 18% |
| Suyin | 10/10 | 6032 days | 21% |
| Tom Ben | 10/10 | 6205 days | 21% |
| Anja Kunert | 9/10 | 6231 days | 21% |
| Zurcher Marco | 10/10 | 6261 days | 21% |
| Sandra Gustafson | 7/10 | 6276 days | 18% |
| Julie | 9/10 | 6520 days | 21% |
| Chatin Perrier | 10/10 | 6571 days | 21% |
| Pete | 9/10 | 6588 days | 21% |
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
-3.90% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 58 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 | -3.84% |
| 198 | -3.86% |
| 199 | -3.88% |
| 200 | -3.90% |
| 201 | -3.92% |
| 202 | -3.94% |
| 203 | -3.96% |
| … | … |
Balancing Adjustment
2.04% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
86%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.