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

91.10%

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
Vicki Hoskinson 10/10 639 days 37.95 100%
Wil Goes 7/10 1760 days true 3.37 9%
Eric Lambley 7/10 2177 days true 2.62 7%
Trish Saunders 9/10 2518 days true 2.22 6%
Kath Tonkin 9/10 2518 days true 2.22 6%
Fabian Lee 6/10 2524 days true 1.83 5%
Elly Zimmer 7/10 2532 days true 1.99 5%
Kerri 9/10 2647 days 1.96 5%
Sylvia Klatt 3/10 2800 days true 1.28 3%
Pete Wilson 9/10 2817 days true 1.63 4%
Willem de Jong 9/10 2852 days true 1.56 4%
Mike Edwards 10/10 2906 days true 1.46 4%
Signe Kaspersen 8/10 3190 days true 0.86 2%
Les Barnes 9/10 3205 days true 0.87 2%
Karl Brachtl 10/10 3205 days true 0.87 2%
Beeny 8/10 3206 days true 0.83 2%
Michael & Janet 9/10 3206 days true 0.87 2%
Nico Schoots 7/10 3207 days true 0.79 2%
Hazel & Alan Damerell 10/10 3207 days true 0.87 2%
Nico Welagen 9/10 3211 days true 0.86 2%
Horst Langstein 9/10 3218 days true 0.85 2%
Des & Ann Bidwell 10/10 3220 days true 0.84 2%
Colin Jenkins 8/10 3236 days true 0.77 2%
Stanton 9/10 3256 days 0.77 2%
John & Lorraine 8/10 3541 days true 0.2 1%
Juergen Wolf 9/10 3552 days true 0.19 1%
Malcolm McLean 8/10 3552 days true 0.18 0%
Erin 6/10 3553 days true 0.16 0%
Laurie Smith 8/10 3553 days true 0.18 0%
David Mellard 10/10 3554 days true 0.19 0%
Zuur 8/10 3559 days true 0.17 0%
Paul Smith 8/10 3568 days true 0.15 0%
Robert Haidt 10/10 3583 days true 0.13 0%
Robin Schomburg 10/10 3587 days true 0.12 0%
Lizzie 10/10 3652 days 0.0 0%
Rosey834 10/10 3652 days 0.0 0%
Margie 10/10 3905 days true 0.0 0%
Kerry Wood 10/10 3929 days true 0.0 0%
Giaque 5/10 3933 days true 0.0 0%
Chris & Dawn Humphries 9/10 3934 days true 0.0 0%
Maria Newton 8/10 3937 days true 0.0 0%
J Kempeneers 8/10 3941 days true 0.0 0%
Beverly B 8/10 3969 days true 0.0 0%
ianc 10/10 4009 days true 0.0 0%
koellner 4/10 4015 days true 0.0 0%
Deede K 9/10 4025 days true 0.0 0%
Kathrin Thomas 8/10 4029 days true 0.0 0%
Ruth Kinder 10/10 4047 days 0.0 0%
harryb 8/10 4126 days true 0.0 0%
regw 10/10 4137 days true 0.0 0%
gerrys 8/10 4216 days true 0.0 0%
streneer 10/10 4248 days true 0.0 0%
SSheil 10/10 4249 days true 0.0 0%
Mike 7/10 4265 days true 0.0 0%
Roy 9/10 4265 days true 0.0 0%
A 10/10 4292 days true 0.0 0%
SimonR 9/10 4295 days true 0.0 0%
VacherD 8/10 4296 days true 0.0 0%
Paul 7/10 4304 days true 0.0 0%
john west 8/10 4329 days true 0.0 0%
jonathan 9/10 4382 days true 0.0 0%
martina 8/10 4458 days true 0.0 0%
Esther 6/10 4467 days true 0.0 0%
Helen 9/10 4611 days true 0.0 0%
Liz 9/10 4644 days true 0.0 0%
Sue 6/10 4979 days true 0.0 0%
Cat 5/10 4991 days true 0.0 0%
Franz-Josef 9/10 5043 days true 0.0 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 Taieri Gorge Railway experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.07% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 43 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 -4.01%
198 -4.03%
199 -4.05%
200 -4.07%
201 -4.09%
202 -4.11%
203 -4.13%

Final Ranking Score

87%

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.