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

92.51%

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 10/10 502 days 60.07 100%
Wil Goes 7/10 1622 days true 3.61 6%
Eric Lambley 7/10 2039 days true 2.87 5%
Trish Saunders 9/10 2380 days true 2.49 4%
Kath Tonkin 9/10 2380 days true 2.49 4%
Fabian Lee 6/10 2386 days true 2.05 3%
Elly Zimmer 7/10 2394 days true 2.24 4%
Kerri 9/10 2509 days 2.23 4%
Sylvia Klatt 3/10 2662 days true 1.49 2%
Pete Wilson 9/10 2679 days true 1.9 3%
Willem de Jong 9/10 2714 days true 1.83 3%
Mike Edwards 10/10 2768 days true 1.73 3%
Signe Kaspersen 8/10 3052 days true 1.11 2%
Les Barnes 9/10 3067 days true 1.14 2%
Karl Brachtl 10/10 3067 days true 1.14 2%
Beeny 8/10 3068 days true 1.08 2%
Michael & Janet 9/10 3068 days true 1.14 2%
Nico Schoots 7/10 3069 days true 1.03 2%
Hazel & Alan Damerell 10/10 3069 days true 1.14 2%
Nico Welagen 9/10 3073 days true 1.13 2%
Horst Langstein 9/10 3080 days true 1.12 2%
Des & Ann Bidwell 10/10 3082 days true 1.11 2%
Colin Jenkins 8/10 3098 days true 1.03 2%
Stanton 9/10 3118 days 1.04 2%
John & Lorraine 8/10 3403 days true 0.46 1%
Juergen Wolf 9/10 3414 days true 0.46 1%
Malcolm McLean 8/10 3414 days true 0.44 1%
Erin 6/10 3415 days true 0.38 1%
Laurie Smith 8/10 3415 days true 0.44 1%
David Mellard 10/10 3416 days true 0.46 1%
Zuur 8/10 3421 days true 0.43 1%
Paul Smith 8/10 3430 days true 0.41 1%
Robert Haidt 10/10 3445 days true 0.4 1%
Robin Schomburg 10/10 3449 days true 0.39 1%
Lizzie 10/10 3514 days 0.27 0%
Rosey834 10/10 3514 days 0.27 0%
Margie 10/10 3767 days true 0.0 0%
Kerry Wood 10/10 3791 days true 0.0 0%
Giaque 5/10 3795 days true 0.0 0%
Chris & Dawn Humphries 9/10 3796 days true 0.0 0%
Maria Newton 8/10 3799 days true 0.0 0%
J Kempeneers 8/10 3803 days true 0.0 0%
Beverly B 8/10 3831 days true 0.0 0%
ianc 10/10 3871 days true 0.0 0%
koellner 4/10 3877 days true 0.0 0%
Deede K 9/10 3887 days true 0.0 0%
Kathrin Thomas 8/10 3891 days true 0.0 0%
Ruth Kinder 10/10 3909 days 0.0 0%
harryb 8/10 3988 days true 0.0 0%
regw 10/10 3999 days true 0.0 0%
gerrys 8/10 4078 days true 0.0 0%
streneer 10/10 4110 days true 0.0 0%
SSheil 10/10 4111 days true 0.0 0%
Mike 7/10 4128 days true 0.0 0%
Roy 9/10 4128 days true 0.0 0%
A 10/10 4155 days true 0.0 0%
SimonR 9/10 4157 days true 0.0 0%
VacherD 8/10 4158 days true 0.0 0%
Paul 7/10 4167 days true 0.0 0%
john west 8/10 4191 days true 0.0 0%
jonathan 9/10 4245 days true 0.0 0%
martina 8/10 4321 days true 0.0 0%
Esther 6/10 4330 days true 0.0 0%
Helen 9/10 4473 days true 0.0 0%
Liz 9/10 4506 days true 0.0 0%
Sue 6/10 4841 days true 0.0 0%
Cat 5/10 4853 days true 0.0 0%
Franz-Josef 9/10 4905 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

-2.00% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 125 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 -1.97%
198 -1.98%
199 -1.99%
200 -2.00%
201 -2.01%
202 -2.02%
203 -2.03%

Final Ranking Score

91%

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.