Ranking Score Explained

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.

Cymen Crick's avatar

Cymen Crick

Rankers Owner

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

87.95%

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 2453 days 100%
Dorothy and Graham Glen 10/10 2602 days 92%
Lars Grosse 10/10 2823 days 80%
Harald Ludtke 4/10 2842 days 50%
Rob and Nicole 8/10 2872 days 76%
Elke Paul 10/10 2896 days 76%
Chloe 5/10 3272 days 42%
Corinna Fallenbuchel 8/10 3656 days 35%
Richard 10/10 3824 days 26%
Julie Robinson 10/10 3961 days 19%
Ene Pold 9/10 3968 days 18%
Andrea Hiemer 10/10 3981 days 18%
Claudia 10/10 4008 days 16%
Jill Fischer 9/10 4311 days 0%
Jim and JoAnn Harllee 8/10 4407 days 23%
Brasier 9/10 4682 days 24%
Melanie Mathiak 10/10 4688 days 24%
Domroes 10/10 4697 days 24%
Carel 8/10 4702 days 23%
Herbert 10/10 4718 days 24%
JBunn 10/10 4736 days 24%
Dorthe 2/10 4768 days 9%
Helle Thomsen 10/10 4783 days 24%
Henrick Lund 8/10 5029 days 23%
Marcel Camsch 9/10 5034 days 24%
LandJ 6/10 5042 days 20%
Bert Opdam 9/10 5052 days 24%
Marieke and Bert-Jan 9/10 5058 days 24%
Jackie Morris 9/10 5061 days 24%
Montys 10/10 5193 days 24%
Marcia & Bruce 8/10 5397 days 23%
Ingrid Zell 8/10 5398 days 23%
Marcus Kippner 9/10 5398 days 24%
John Helle 7/10 5428 days 22%
Harmann Volker 8/10 5429 days 23%
Chidlebyte 10/10 5435 days 24%
Jessica 7/10 5440 days 22%
E.M. Prideaux 10/10 5449 days 24%
Jennifer Templeton 9/10 5452 days 24%
sels 10/10 5497 days 24%
Decuq 8/10 5508 days 23%
Suzanne 9/10 5558 days 24%
Thomas1646 10/10 5748 days 24%
Frank 10/10 5758 days 24%
Max 10/10 5760 days 24%
Jana 10/10 5760 days 24%
Anton 4/10 5764 days 14%
Tolsten 8/10 5783 days 23%
Claudia 9/10 5825 days 24%
Ria 9/10 6128 days 24%
Christian 8/10 6128 days 23%
Maria Fahlander 10/10 6131 days 24%
Sanne 8/10 6134 days 23%
Volders 9/10 6134 days 24%
Tessa McCormick 9/10 6138 days 24%
Gabriel Faber 9/10 6216 days 24%
Schranger 8/10 6478 days 23%
Fenke 7/10 6483 days 22%
Michaela 10/10 6495 days 24%
Berke 10/10 6506 days 24%
Rolf Kruger 8/10 6519 days 23%

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

-4.04% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 41 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 -3.98%
198 -4.00%
199 -4.02%
200 -4.04%
201 -4.06%
202 -4.08%
203 -4.10%

Balancing Adjustment

2.05% 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.