Hi, 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 Doubtful Sound Overnight Cruise.
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.
Doubtful Sound Overnight Cruise
Valid Reviews
89 Valid Reviews
The Doubtful Sound Overnight Cruise experience has a total of 89 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 89 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 55 |
|
62% |
| 9/10 | 25 |
|
28% |
| 8/10 | 8 |
|
9% |
| 7/10 | 0 |
|
0% |
| 6/10 | 1 |
|
1% |
| 5/10 | 0 |
|
0% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
94.94% Average
The raw data average (mean) for all the Doubtful Sound Overnight Cruise valid reviews is 94.94% and is based on 89 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
74 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 89 valid reviews, the experience has 74 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 74 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 44 |
|
59% |
| 9/10 | 22 |
|
30% |
| 8/10 | 8 |
|
11% |
| 7/10 | 0 |
|
0% |
| 6/10 | 0 |
|
0% |
| 5/10 | 0 |
|
0% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
94.86% Average
The raw data average (mean) for all the Doubtful Sound Overnight Cruise face-to-face reviews is 94.86% and is based on 74 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
95.30%
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 |
|---|---|---|---|
| Jonny Horn | 9/10 | 3326 days | 100% |
| Hazel Norman | 10/10 | 3341 days | 100% |
| James Jackson | 10/10 | 3342 days | 99% |
| Bartlomiej Berger | 9/10 | 4037 days | 31% |
| Ann Wilson | 8/10 | 4293 days | 6% |
| Anne and Steve Bartlett | 9/10 | 4358 days | 0% |
| Abby Rescr | 9/10 | 4672 days | 47% |
| Frederick Dean | 8/10 | 4672 days | 47% |
| Joey Mertzig | 10/10 | 4689 days | 48% |
| Rien | 9/10 | 5029 days | 47% |
| Clausen | 9/10 | 5030 days | 47% |
| kiwifrenchy | 10/10 | 5037 days | 48% |
| Sam | 10/10 | 5041 days | 48% |
| Pete & Pat Etheridge | 10/10 | 5046 days | 48% |
| Mike & Jennie | 9/10 | 5048 days | 47% |
| Stefes Wencke | 10/10 | 5050 days | 48% |
| Uwe Henze | 10/10 | 5051 days | 48% |
| Manuela Weber | 10/10 | 5051 days | 48% |
| Thyg Lingdal | 10/10 | 5065 days | 48% |
| caro | 10/10 | 5097 days | 48% |
| Dean | 9/10 | 5112 days | 47% |
| Anna Bret | 8/10 | 5137 days | 47% |
| Jaime Castells | 9/10 | 5137 days | 47% |
| Gary Koehler | 10/10 | 5394 days | 48% |
| jlgavin | 6/10 | 5403 days | 41% |
| Verheyen | 10/10 | 5407 days | 48% |
| Chris Darlington | 10/10 | 5411 days | 48% |
| Dieter Uhlmann | 9/10 | 5414 days | 47% |
| Angi Otti | 10/10 | 5422 days | 48% |
| Jackie Morris | 10/10 | 5422 days | 48% |
| Samuel Prechel | 10/10 | 5423 days | 48% |
| David Glover | 10/10 | 5425 days | 48% |
| Claus Olsen | 10/10 | 5426 days | 48% |
| H Schepers | 9/10 | 5427 days | 47% |
| georgiarose89 | 10/10 | 5462 days | 48% |
| chrissie2011 | 10/10 | 5462 days | 48% |
| Chris | 10/10 | 5681 days | 48% |
| Sabine | 10/10 | 5681 days | 48% |
| Kevin & Chris | 9/10 | 5701 days | 47% |
| davidm239 | 9/10 | 5707 days | 47% |
| Margie | 10/10 | 5746 days | 48% |
| Agnes | 8/10 | 5747 days | 47% |
| Graeme + Jane Ryan | 10/10 | 5758 days | 48% |
| Westermann | 10/10 | 5759 days | 48% |
| Peter Brown | 10/10 | 5764 days | 48% |
| johnandgin | 10/10 | 5768 days | 48% |
| Angela | 10/10 | 5769 days | 48% |
| T. Timmers | 9/10 | 5782 days | 47% |
| Loleit | 10/10 | 5789 days | 48% |
| David Valentine | 10/10 | 5790 days | 48% |
| Annette Schmitt | 9/10 | 5790 days | 47% |
| Jeremy & Sarah Rind | 10/10 | 5795 days | 48% |
| Jessica | 9/10 | 5801 days | 47% |
| ChristinaO | 10/10 | 5827 days | 48% |
| Simon Jones | 9/10 | 5827 days | 47% |
| Jerry | 10/10 | 5858 days | 48% |
| HairyHaggis | 9/10 | 5888 days | 47% |
| Suzanne | 10/10 | 5919 days | 48% |
| Traveller Girl | 10/10 | 6072 days | 48% |
| Switz | 10/10 | 6086 days | 48% |
| DanielGermany | 10/10 | 6094 days | 48% |
| CornelissenS | 9/10 | 6119 days | 47% |
| Inger | 10/10 | 6120 days | 48% |
| Robert | 9/10 | 6133 days | 47% |
| Theresa | 9/10 | 6139 days | 47% |
| Sue | 9/10 | 6142 days | 47% |
| Inger Skov | 10/10 | 6145 days | 48% |
| Ruben | 8/10 | 6176 days | 47% |
| Claire | 10/10 | 6188 days | 48% |
| C Digby | 9/10 | 6192 days | 47% |
| Adam | 10/10 | 6233 days | 48% |
| Stephanie Schikora | 10/10 | 6245 days | 48% |
| Sue Stewart | 10/10 | 6352 days | 48% |
| James Gibbs | 8/10 | 6444 days | 47% |
| Helen | 9/10 | 6452 days | 47% |
| Menashe | 10/10 | 6472 days | 48% |
| George Jeffs | 10/10 | 6481 days | 48% |
| Paul Weston | 9/10 | 6495 days | 47% |
| Marian Mckinney | 10/10 | 6495 days | 48% |
| Charles Price | 8/10 | 6506 days | 47% |
| Vicky Elliott | 10/10 | 6513 days | 48% |
| Anne Mainwaring | 10/10 | 6521 days | 48% |
| Kilsby | 10/10 | 6530 days | 48% |
| Dupre | 8/10 | 6571 days | 47% |
| dieter | 10/10 | 6590 days | 48% |
| Rene Schotvanger | 10/10 | 6704 days | 48% |
| Pat Brewster | 10/10 | 6704 days | 48% |
| Paul Yacoumis | 10/10 | 6830 days | 48% |
| Sandra | 10/10 | 6839 days | 48% |
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 Doubtful Sound Overnight Cruise experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.06% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 days. However the Doubtful Sound Overnight Cruise 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 Doubtful Sound Overnight Cruise experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -4.00% |
| 198 | -4.02% |
| 199 | -4.04% |
| 200 | -4.06% |
| 201 | -4.08% |
| 202 | -4.10% |
| 203 | -4.12% |
| … | … |
Balancing Adjustment
0.84% 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
92%
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.