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 Tranz Alpine Train.
If you have any questions or comments about our ranking score calculation please get in touch at email@example.com. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.
68 Valid Reviews
The Tranz Alpine Train experience has a total of 68 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 68 valid reviews:
The raw data average (mean) for all the Tranz Alpine Train valid reviews is 78.24% and is based on 68 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.
63 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.
Within the 68 valid reviews, the experience has 63 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 63 face-to-face reviews:
The raw data average (mean) for all the Tranz Alpine Train face-to-face reviews is 78.25% and is based on 63 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
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.
|Steve Sopota||4/10||790 days||15.6||100%|
|Fanny Hacquart||5/10||1273 days||3.77||24%|
|Jill Stebbing||7/10||1541 days||3.76||24%|
|Amadeus van Schie||8/10||1624 days||3.77||24%|
|Esther Itier||7/10||1911 days||3.1||20%|
|Thomas Neron||7/10||1911 days||3.1||20%|
|Clare Lambley||8/10||1992 days||3.08||20%|
|Eric Lambley||5/10||1993 days||2.63||17%|
|Ngaire Davies||7/10||2324 days||2.36||15%|
|Cindy Parson||10/10||2616 days||2.02||13%|
|Petra Blumberg||8/10||2653 days||1.85||12%|
|David and Sally Wallis||8/10||2728 days||1.71||11%|
|Steve and Therese Dunne||8/10||2749 days||1.68||11%|
|Michael & Janet||9/10||3022 days||1.23||8%|
|Michael & Rosemary Smith||8/10||3027 days||1.16||7%|
|Mike & April Prince||8/10||3054 days||1.11||7%|
|Warwick Ravell||9/10||3120 days||1.04||7%|
|Alita Smith||2/10||3350 days||0.44||3%|
|Graham Greentree||9/10||3355 days||0.58||4%|
|Bill Cutler||9/10||3368 days||0.55||4%|
|Steve Pearce||8/10||3382 days||0.5||3%|
|Jenny & Barry Sleeman||8/10||3399 days||0.47||3%|
|David Glover||10/10||3400 days||0.49||3%|
|Grada Anderson||10/10||3406 days||0.48||3%|
|Kerry Wood||10/10||3745 days||0.0||0%|
|David Valentine||4/10||3765 days||0.0||0%|
|Sandra B||8/10||3770 days||0.0||0%|
|Gary Judd||8/10||3770 days||0.0||0%|
|Wolfgang Dittrich||8/10||3843 days||0.0||0%|
|Simon Bartholomew||6/10||3845 days||0.0||0%|
|Sarah Smith||7/10||3859 days||0.0||0%|
|Aiko Nishimura||8/10||4464 days||0.0||0%|
|Kerstin Brantryd||5/10||4464 days||0.0||0%|
|Marian Mckinney||9/10||4470 days||0.0||0%|
|Greg & Lynette||9/10||4470 days||0.0||0%|
|Sally and David Wallis||8/10||4477 days||0.0||0%|
|Lisa Tame||7/10||4478 days||0.0||0%|
|Jim Curley||6/10||4489 days||0.0||0%|
|Lyn Saxon||8/10||4562 days||0.0||0%|
|Pam Rose||8/10||4817 days||0.0||0%|
Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.
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 Tranz Alpine Train experience has plenty of reviews and does not meet the criteria for any adjustment.
There may be an adjustment if this experience hasn't received any reviews within the last 105 days. However the Tranz Alpine Train 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 Tranz Alpine Train experience has been adjusted for 200 days. Adjustments are according to the following table.
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 firstname.lastname@example.org.