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 Waterfalls Estate.
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.
Waterfalls Estate
Valid Reviews
67 Valid Reviews
The Waterfalls Estate experience has a total of 68 reviews. There are 67 valid reviews that are included when calculating the ranking score and 1 invalid review 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 67 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 27 |
|
40% |
| 9/10 | 21 |
|
31% |
| 8/10 | 13 |
|
19% |
| 7/10 | 3 |
|
4% |
| 6/10 | 2 |
|
3% |
| 5/10 | 0 |
|
0% |
| 4/10 | 1 |
|
1% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
89.55% Average
The raw data average (mean) for all the Waterfalls Estate valid reviews is 89.55% and is based on 67 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
12 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 67 valid reviews, the experience has 12 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 12 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 3 |
|
25% |
| 9/10 | 5 |
|
42% |
| 8/10 | 2 |
|
17% |
| 7/10 | 1 |
|
8% |
| 6/10 | 1 |
|
8% |
| 5/10 | 0 |
|
0% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
86.67% Average
The raw data average (mean) for all the Waterfalls Estate face-to-face reviews is 86.67% and is based on 12 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
94.10%
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 |
|---|---|---|---|
| Stu | 10/10 | 280 days | 100% |
| BR | 9/10 | 676 days | 77% |
| JMB | 10/10 | 1103 days | 36% |
| Sander & Eva | 10/10 | 1103 days | 36% |
| DJ | 10/10 | 1134 days | 34% |
| Adam | 10/10 | 1134 days | 34% |
| Clément | 10/10 | 1226 days | 27% |
| Sharon Butterworth | 8/10 | 1287 days | 22% |
| Walt Drechsler | 8/10 | 1317 days | 20% |
| Joel Ross | 9/10 | 1348 days | 19% |
| Genevieve | 10/10 | 1348 days | 19% |
| James C | 10/10 | 1376 days | 17% |
| Coline | 10/10 | 1376 days | 17% |
| Dee & Colin | 4/10 | 1407 days | 10% |
| Matthew | 10/10 | 1438 days | 14% |
| Belen Ramirez | 10/10 | 1956 days | 5% |
| Melanie | 9/10 | 1986 days | 5% |
| Tayler | 9/10 | 2078 days | 5% |
| Marcela | 9/10 | 2106 days | 5% |
| Schubi | 9/10 | 2137 days | 5% |
| Nancy Vilker-Krause | 10/10 | 2137 days | 5% |
| Billie Ratu | 9/10 | 2321 days | 4% |
| N&J Moseling | 10/10 | 2443 days | 4% |
| Layna | 8/10 | 2503 days | 4% |
| Tarek | 10/10 | 2534 days | 4% |
| DT | 6/10 | 2534 days | 3% |
| N&A | 10/10 | 2534 days | 4% |
| Franziska | 10/10 | 2564 days | 4% |
| Debbie | 10/10 | 2595 days | 4% |
| Phil | 8/10 | 2625 days | 3% |
| Jenny | 9/10 | 2717 days | 3% |
| Josie | 9/10 | 2748 days | 3% |
| Matt | 9/10 | 2809 days | 3% |
| JT | 9/10 | 2809 days | 3% |
| Margie | 9/10 | 2837 days | 3% |
| TP&MM | 8/10 | 2837 days | 3% |
| Libby | 9/10 | 2868 days | 3% |
| Nancy | 7/10 | 3143 days | 2% |
| Doreen Kersandt | 10/10 | 3194 days | 2% |
| Amy Lord | 10/10 | 3209 days | 2% |
| Phil and Mel Rowson | 8/10 | 3291 days | 2% |
| Sandra Wilson-Ryke | 10/10 | 3307 days | 2% |
| David Hutchison | 9/10 | 3408 days | 2% |
| Jason Stalgis | 8/10 | 3560 days | 2% |
| Glenn Johannsen | 10/10 | 3596 days | 2% |
| Sachiko | 8/10 | 3733 days | 1% |
| Carletta | 10/10 | 3848 days | 1% |
| Julia Summa | 8/10 | 3970 days | 1% |
| Christine Slowiak | 9/10 | 4147 days | 0% |
| Grace Fleck | 7/10 | 4205 days | 0% |
| Bridget M | 10/10 | 4263 days | 0% |
| Wilma Senior | 9/10 | 4329 days | 0% |
| Tobias Herrmann | 10/10 | 4335 days | 0% |
| Steve Power | 8/10 | 4353 days | 0% |
| Manuela | 9/10 | 4356 days | 0% |
| Fabian and Teresa | 9/10 | 5021 days | 1% |
| Krataihai | 10/10 | 5120 days | 1% |
| KDS_Holiday | 8/10 | 5151 days | 1% |
| Mr and Mrs White | 6/10 | 5347 days | 1% |
| Frank Claassen | 8/10 | 5361 days | 1% |
| Anglea de Smit | 9/10 | 5376 days | 1% |
| Preben vil Helmsen | 10/10 | 5377 days | 1% |
| Hans Bos | 9/10 | 5457 days | 1% |
| Paul | 8/10 | 5463 days | 1% |
| Andreas & Sonja | 10/10 | 5472 days | 1% |
| steveE | 9/10 | 6035 days | 1% |
| Martÿn Steenvoorden | 7/10 | 6116 days | 1% |
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 Waterfalls Estate experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-3.94% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 47 days. However the Waterfalls Estate 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 Waterfalls Estate experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -3.88% |
| 198 | -3.90% |
| 199 | -3.92% |
| 200 | -3.94% |
| 201 | -3.96% |
| 202 | -3.98% |
| 203 | -4.00% |
| … | … |
Balancing Adjustment
0.98% 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
91%
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.