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 The Waterworks.
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.
Nick Morrison
Rankers owner
The Waterworks
Valid Reviews
47 Valid Reviews
The The Waterworks experience has a total of 49 reviews. There are 47 valid reviews that are included when calculating the ranking score and 2 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 47 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 24 |
|
51% |
| 9/10 | 10 |
|
21% |
| 8/10 | 9 |
|
19% |
| 7/10 | 2 |
|
4% |
| 6/10 | 1 |
|
2% |
| 5/10 | 1 |
|
2% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
90.85% Average
The raw data average (mean) for all the The Waterworks valid reviews is 90.85% and is based on 47 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
13 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 47 valid reviews, the experience has 13 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 13 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 3 |
|
23% |
| 9/10 | 3 |
|
23% |
| 8/10 | 5 |
|
38% |
| 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% |
84.62% Average
The raw data average (mean) for all the The Waterworks face-to-face reviews is 84.62% and is based on 13 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
89.77%
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 |
|---|---|---|---|---|---|
| Emma Keegan | 7/10 | 1509 days | 4.43 | 82% | |
| Camille Guevel | 9/10 | 1531 days |  |
5.28 | 100% |
| Naelan Le Borgue | 8/10 | 1531 days | |
5.28 | 100% |
| Jonas Nielsen | 6/10 | 1912 days | |
4.66 | 87% |
| Leeann Newton | 10/10 | 1932 days | |
4.62 | 86% |
| GN100 | 8/10 | 1932 days | |
4.62 | 86% |
| MichelleG2 | 10/10 | 1965 days | 3.81 | 70% | |
| William Notcutt | 8/10 | 2330 days | 3.31 | 59% | |
| anaelena | 10/10 | 2636 days | 2.89 | 51% | |
| Vbeirne | 5/10 | 2696 days | 2.81 | 49% | |
| legomobilen | 10/10 | 2757 days | 2.72 | 47% | |
| Mary Hamilton | 10/10 | 2757 days | 2.72 | 47% | |
| erica130 | 10/10 | 2788 days | 2.68 | 46% | |
| debs | 9/10 | 2788 days | 2.68 | 46% | |
| floflo | 10/10 | 2910 days | 2.51 | 43% | |
| Kim652406 | 10/10 | 2941 days | 2.47 | 42% | |
| AliBe | 10/10 | 2941 days | 2.47 | 42% | |
| Jo_harper | 10/10 | 2971 days | 2.43 | 41% | |
| Jon_and_Family | 9/10 | 2971 days | 2.43 | 41% | |
| bryanhamey | 10/10 | 2971 days | 2.43 | 41% | |
| deanmatuka | 10/10 | 3002 days | 2.39 | 40% | |
| Mirka Tinterova | 9/10 | 3004 days | |
2.86 | 50% |
| Mr and Mrs Scott | 8/10 | 3367 days | 1.89 | 30% | |
| Carolina Gonzalez | 10/10 | 3393 days | |
2.22 | 37% |
| Ralf Genthe | 9/10 | 3412 days | |
2.19 | 36% |
| Numun | 9/10 | 3426 days | 1.81 | 28% | |
| kathryngorton | 9/10 | 3457 days | 1.76 | 27% | |
| ona74 | 10/10 | 3457 days | 1.76 | 27% | |
| asiacritics | 8/10 | 3487 days | 1.72 | 27% | |
| lizzie | 10/10 | 3487 days | 1.72 | 27% | |
| Renee Porter | 10/10 | 3610 days | 1.55 | 23% | |
| Jones | 10/10 | 3610 days | 1.55 | 23% | |
| Chris Ogilvie | 9/10 | 3610 days | 1.55 | 23% | |
| keryhuel patrick | 9/10 | 3610 days | 1.55 | 23% | |
| Ben Tee | 10/10 | 3610 days | 1.55 | 23% | |
| Lee Hanson | 10/10 | 3671 days | 1.47 | 21% | |
| Matene | 10/10 | 3671 days | 1.47 | 21% | |
| Charles Lyne | 9/10 | 3671 days | 1.47 | 21% | |
| Belinda Muir | 8/10 | 3791 days | 1.31 | 18% | |
| xp67 | 10/10 | 3803 days | 1.29 | 18% | |
| William McFarlanne | 10/10 | 3946 days | 1.09 | 14% | |
| Audrey Fairclough | 10/10 | 3962 days | 1.07 | 13% | |
| Andria Davis | 10/10 | 4094 days | |
1.07 | 13% |
| SueLinsk | 8/10 | 4431 days | |
0.52 | 2% |
| beesom | 8/10 | 4467 days | |
0.46 | 0% |
| Rolf | 8/10 | 4479 days | |
0.44 | 0% |
| Nicole | 7/10 | 4479 days | |
0.44 | 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 The Waterworks experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-7.28% Adjustment
There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the The Waterworks 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 364 days.
The The Waterworks experience has been adjusted for 364 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 361 | -7.22% |
| 362 | -7.24% |
| 363 | -7.26% |
| 364 | -7.28% |
| 365 | -7.30% |
| 366 | -7.32% |
| 367 | -7.34% |
| … | … |
Final Ranking Score
82%
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.