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 Taieri Gorge Railway.

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's avatar

Nick Morrison

Rankers owner

Taieri Gorge Railway

Valid Reviews

68 Valid Reviews

The Taieri Gorge Railway 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:

Rating Count Percentage
10/10 18
26%
9/10 19
28%
8/10 17
25%
7/10 6
9%
6/10 4
6%
5/10 2
3%
4/10 1
1%
3/10 1
1%
2/10 0
0%
1/10 0
0%

83.82% Average

The raw data average (mean) for all the Taieri Gorge Railway valid reviews is 83.82% 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.

Face-to-Face Reviews

62 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 68 valid reviews, the experience has 62 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 62 face-to-face reviews:

Rating Count Percentage
10/10 14
23%
9/10 17
27%
8/10 17
27%
7/10 6
10%
6/10 4
6%
5/10 2
3%
4/10 1
2%
3/10 1
2%
2/10 0
0%
1/10 0
0%

82.58% Average

The raw data average (mean) for all the Taieri Gorge Railway face-to-face reviews is 82.58% and is based on 62 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

86.65%

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
Vicki Hoskinson 10/10 807 days 100%
Wil Goes 7/10 1928 days 15%
Eric Lambley 7/10 2345 days 11%
Trish Saunders 9/10 2686 days 8%
Kath Tonkin 9/10 2686 days 8%
Fabian Lee 6/10 2692 days 6%
Elly Zimmer 7/10 2700 days 7%
Kerri 9/10 2815 days 7%
Sylvia Klatt 3/10 2968 days 3%
Pete Wilson 9/10 2985 days 5%
Willem de Jong 9/10 3020 days 4%
Mike Edwards 10/10 3074 days 4%
Signe Kaspersen 8/10 3358 days 1%
Les Barnes 9/10 3373 days 1%
Karl Brachtl 10/10 3373 days 1%
Beeny 8/10 3374 days 0%
Michael & Janet 9/10 3374 days 1%
Nico Schoots 7/10 3375 days 0%
Hazel & Alan Damerell 10/10 3375 days 1%
Nico Welagen 9/10 3379 days 0%
Horst Langstein 9/10 3386 days 0%
Des & Ann Bidwell 10/10 3388 days 0%
Colin Jenkins 8/10 3404 days 0%
Stanton 9/10 3424 days 0%
John & Lorraine 8/10 3709 days 3%
Juergen Wolf 9/10 3720 days 3%
Malcolm McLean 8/10 3720 days 3%
Erin 6/10 3721 days 2%
Laurie Smith 8/10 3721 days 3%
David Mellard 10/10 3722 days 3%
Zuur 8/10 3727 days 3%
Paul Smith 8/10 3736 days 3%
Robert Haidt 10/10 3751 days 3%
Robin Schomburg 10/10 3755 days 3%
Lizzie 10/10 3820 days 3%
Rosey834 10/10 3820 days 3%
Margie 10/10 4073 days 3%
Kerry Wood 10/10 4097 days 3%
Giaque 5/10 4101 days 2%
Chris & Dawn Humphries 9/10 4102 days 3%
Maria Newton 8/10 4105 days 3%
J Kempeneers 8/10 4109 days 3%
Beverly B 8/10 4137 days 3%
ianc 10/10 4177 days 3%
koellner 4/10 4183 days 2%
Deede K 9/10 4193 days 3%
Kathrin Thomas 8/10 4197 days 3%
Ruth Kinder 10/10 4215 days 3%
harryb 8/10 4294 days 3%
regw 10/10 4305 days 3%
gerrys 8/10 4384 days 3%
streneer 10/10 4416 days 3%
SSheil 10/10 4417 days 3%
Mike 7/10 4433 days 3%
Roy 9/10 4433 days 3%
A 10/10 4460 days 3%
SimonR 9/10 4463 days 3%
VacherD 8/10 4464 days 3%
Paul 7/10 4472 days 3%
john west 8/10 4497 days 3%
jonathan 9/10 4550 days 3%
martina 8/10 4626 days 3%
Esther 6/10 4635 days 2%
Helen 9/10 4779 days 3%
Liz 9/10 4812 days 3%
Sue 6/10 5147 days 2%
Cat 5/10 5159 days 2%
Franz-Josef 9/10 5211 days 3%

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 Taieri Gorge Railway experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-2.76% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 93 days. However the Taieri Gorge Railway 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 Taieri Gorge Railway experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -2.72%
198 -2.73%
199 -2.74%
200 -2.76%
201 -2.77%
202 -2.79%
203 -2.80%

Final Ranking Score

84%

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.