Kia ora, 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 The OPERA.
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.
The OPERA
Valid Reviews
61 Valid Reviews
The The OPERA experience has a total of 61 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 61 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 24 |
|
39% |
| 9/10 | 15 |
|
25% |
| 8/10 | 14 |
|
23% |
| 7/10 | 3 |
|
5% |
| 6/10 | 1 |
|
2% |
| 5/10 | 1 |
|
2% |
| 4/10 | 2 |
|
3% |
| 3/10 | 0 |
|
0% |
| 2/10 | 1 |
|
2% |
| 1/10 | 0 |
|
0% |
86.72% Average
The raw data average (mean) for all the The OPERA valid reviews is 86.72% and is based on 61 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
52 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 61 valid reviews, the experience has 52 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 52 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 18 |
|
35% |
| 9/10 | 13 |
|
25% |
| 8/10 | 14 |
|
27% |
| 7/10 | 3 |
|
6% |
| 6/10 | 0 |
|
0% |
| 5/10 | 1 |
|
2% |
| 4/10 | 2 |
|
4% |
| 3/10 | 0 |
|
0% |
| 2/10 | 1 |
|
2% |
| 1/10 | 0 |
|
0% |
85.58% Average
The raw data average (mean) for all the The OPERA face-to-face reviews is 85.58% and is based on 52 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
87.74%
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 |
|---|---|---|---|
| Antony Wilson | 10/10 | 2805 days | 100% |
| Dorothy and Graham Glen | 10/10 | 2953 days | 90% |
| Lars Grosse | 10/10 | 3174 days | 76% |
| Harald Ludtke | 4/10 | 3193 days | 49% |
| Rob and Nicole | 8/10 | 3223 days | 72% |
| Elke Paul | 10/10 | 3247 days | 72% |
| Chloe | 5/10 | 3623 days | 36% |
| Corinna Fallenbuchel | 8/10 | 4007 days | 22% |
| Richard | 10/10 | 4175 days | 12% |
| Julie Robinson | 10/10 | 4312 days | 3% |
| Ene Pold | 9/10 | 4319 days | 3% |
| Andrea Hiemer | 10/10 | 4332 days | 2% |
| Claudia | 10/10 | 4359 days | 0% |
| Jill Fischer | 9/10 | 4662 days | 31% |
| Jim and JoAnn Harllee | 8/10 | 4758 days | 31% |
| Brasier | 9/10 | 5033 days | 31% |
| Melanie Mathiak | 10/10 | 5039 days | 32% |
| Domroes | 10/10 | 5048 days | 32% |
| Carel | 8/10 | 5053 days | 31% |
| Herbert | 10/10 | 5069 days | 32% |
| JBunn | 10/10 | 5087 days | 32% |
| Dorthe | 2/10 | 5119 days | 14% |
| Helle Thomsen | 10/10 | 5134 days | 32% |
| Henrick Lund | 8/10 | 5380 days | 31% |
| Marcel Camsch | 9/10 | 5385 days | 31% |
| LandJ | 6/10 | 5393 days | 27% |
| Bert Opdam | 9/10 | 5403 days | 31% |
| Marieke and Bert-Jan | 9/10 | 5409 days | 31% |
| Jackie Morris | 9/10 | 5412 days | 31% |
| Montys | 10/10 | 5544 days | 32% |
| Marcia & Bruce | 8/10 | 5748 days | 31% |
| Ingrid Zell | 8/10 | 5749 days | 31% |
| Marcus Kippner | 9/10 | 5749 days | 31% |
| John Helle | 7/10 | 5779 days | 29% |
| Harmann Volker | 8/10 | 5780 days | 31% |
| Chidlebyte | 10/10 | 5786 days | 32% |
| Jessica | 7/10 | 5791 days | 29% |
| E.M. Prideaux | 10/10 | 5800 days | 32% |
| Jennifer Templeton | 9/10 | 5803 days | 31% |
| sels | 10/10 | 5848 days | 32% |
| Decuq | 8/10 | 5859 days | 31% |
| Suzanne | 9/10 | 5909 days | 31% |
| Thomas1646 | 10/10 | 6099 days | 32% |
| Frank | 10/10 | 6110 days | 32% |
| Max | 10/10 | 6111 days | 32% |
| Jana | 10/10 | 6111 days | 32% |
| Anton | 4/10 | 6116 days | 20% |
| Tolsten | 8/10 | 6134 days | 31% |
| Claudia | 9/10 | 6177 days | 31% |
| Ria | 9/10 | 6479 days | 31% |
| Christian | 8/10 | 6479 days | 31% |
| Maria Fahlander | 10/10 | 6482 days | 32% |
| Sanne | 8/10 | 6485 days | 31% |
| Volders | 9/10 | 6485 days | 31% |
| Tessa McCormick | 9/10 | 6489 days | 31% |
| Gabriel Faber | 9/10 | 6567 days | 31% |
| Schranger | 8/10 | 6829 days | 31% |
| Fenke | 7/10 | 6834 days | 29% |
| Michaela | 10/10 | 6846 days | 32% |
| Berke | 10/10 | 6857 days | 32% |
| Rolf Kruger | 8/10 | 6870 days | 31% |
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 The OPERA experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.07% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 days. However the The OPERA 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 The OPERA experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -4.01% |
| 198 | -4.03% |
| 199 | -4.05% |
| 200 | -4.07% |
| 201 | -4.09% |
| 202 | -4.11% |
| 203 | -4.13% |
| … | … |
Balancing Adjustment
2.10% 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.