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
88.51%
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 | 1687 days | 92% |
| Alice Ormandy | 9/10 | 1709 days | 100% |
| Manu Liberta | 10/10 | 1754 days | 98% |
| Bram Hoonhout | 8/10 | 1760 days | 92% |
| Sarah | 10/10 | 1781 days | 96% |
| Robertoi | 9/10 | 1799 days | 95% |
| Charly | 9/10 | 2004 days | 84% |
| Liam King | 9/10 | 2016 days | 83% |
| Clare Holden | 10/10 | 2024 days | 83% |
| Oliver Schatz | 10/10 | 2051 days | 81% |
| Nick Young | 10/10 | 2056 days | 81% |
| Lisa | 8/10 | 2070 days | 76% |
| Josephine | 7/10 | 2086 days | 72% |
| Markus Delinsky | 8/10 | 2423 days | 58% |
| Hubert | 10/10 | 2495 days | 57% |
| Anja Weppler | 7/10 | 2729 days | 40% |
| Sandra Frischmann | 9/10 | 2759 days | 43% |
| Simon Galpin | 9/10 | 2760 days | 43% |
| Kletter | 9/10 | 3119 days | 23% |
| Jeanne Moustier | 9/10 | 3168 days | 21% |
| Michael Kretzschmar | 10/10 | 3203 days | 19% |
| Lydia Holleman | 9/10 | 3208 days | 18% |
| John | 9/10 | 3210 days | 18% |
| Jon Barratt | 9/10 | 3223 days | 18% |
| Kali Lohman | 8/10 | 3233 days | 16% |
| Stuart Arrol | 9/10 | 3457 days | 5% |
| melemele | 9/10 | 3461 days | 5% |
| Simon Rawlinson | 9/10 | 3473 days | 4% |
| Jill Homewood | 10/10 | 3485 days | 3% |
| Signe Kaspersen | 7/10 | 3486 days | 2% |
| Robert Steendijk | 7/10 | 3487 days | 2% |
| Jaap & Susanne | 7/10 | 3501 days | 2% |
| Aridne Giraud | 8/10 | 3504 days | 2% |
| Nora | 9/10 | 3505 days | 2% |
| Andy Bridgman | 7/10 | 3506 days | 1% |
| Nikki Bentley | 9/10 | 3507 days | 2% |
| Filsack | 8/10 | 3513 days | 1% |
| Herbert | 7/10 | 3534 days | 0% |
| Stephane Lebel | 10/10 | 3831 days | 22% |
| Florian | 9/10 | 3848 days | 22% |
| Antoine Van Hoovled | 9/10 | 3848 days | 22% |
| K Dahmer | 10/10 | 3851 days | 22% |
| Julia | 9/10 | 3856 days | 22% |
| WeddingMaven | 10/10 | 3858 days | 22% |
| Kasia Robshaw | 9/10 | 3862 days | 22% |
| Roger Lows | 9/10 | 3877 days | 22% |
| Jochen | 7/10 | 3884 days | 20% |
| VisualDelight | 10/10 | 4070 days | 22% |
| John Cox | 9/10 | 4229 days | 22% |
| Susi Schoetzler | 10/10 | 4271 days | 22% |
| Simon Bartholomew | 10/10 | 4325 days | 22% |
| Raewyn | 10/10 | 4554 days | 22% |
| Ger | 9/10 | 4555 days | 22% |
| jjakkeren | 7/10 | 4557 days | 20% |
| PaulC | 9/10 | 4563 days | 22% |
| Dave Ashun | 9/10 | 4564 days | 22% |
| ChristinaV | 8/10 | 4566 days | 21% |
| JanW | 3/10 | 4569 days | 16% |
| KatrinS | 8/10 | 4569 days | 21% |
| Christian Moll | 7/10 | 4573 days | 20% |
| Peter | 8/10 | 4573 days | 21% |
| Charles | 8/10 | 4589 days | 21% |
| JennyD1 | 7/10 | 4663 days | 20% |
| bobmcg | 10/10 | 4670 days | 22% |
| Stephanie Schikora | 10/10 | 4700 days | 22% |
| Paul | 7/10 | 4734 days | 20% |
| Suyin | 10/10 | 4754 days | 22% |
| Tom Ben | 10/10 | 4928 days | 22% |
| Anja Kunert | 9/10 | 4954 days | 22% |
| Zurcher Marco | 10/10 | 4984 days | 22% |
| Sandra Gustafson | 7/10 | 4999 days | 20% |
| Julie | 9/10 | 5243 days | 22% |
| Chatin Perrier | 10/10 | 5294 days | 22% |
| Pete | 9/10 | 5311 days | 22% |
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
-3.07% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 73 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 | -3.03% |
| 198 | -3.04% |
| 199 | -3.06% |
| 200 | -3.07% |
| 201 | -3.09% |
| 202 | -3.10% |
| 203 | -3.12% |
| … | … |
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.