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

84.55%

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 1006 days 100%
Wil Goes 7/10 2127 days 43%
Eric Lambley 7/10 2544 days 31%
Trish Saunders 9/10 2885 days 23%
Kath Tonkin 9/10 2885 days 23%
Fabian Lee 6/10 2891 days 19%
Elly Zimmer 7/10 2899 days 21%
Kerri 9/10 3014 days 19%
Sylvia Klatt 3/10 3167 days 11%
Pete Wilson 9/10 3184 days 14%
Willem de Jong 9/10 3219 days 13%
Mike Edwards 10/10 3273 days 11%
Signe Kaspersen 8/10 3557 days 2%
Les Barnes 9/10 3572 days 2%
Karl Brachtl 10/10 3572 days 2%
Beeny 8/10 3573 days 1%
Michael & Janet 9/10 3573 days 2%
Nico Schoots 7/10 3574 days 1%
Hazel & Alan Damerell 10/10 3574 days 2%
Nico Welagen 9/10 3578 days 1%
Horst Langstein 9/10 3585 days 1%
Des & Ann Bidwell 10/10 3587 days 1%
Colin Jenkins 8/10 3603 days 1%
Stanton 9/10 3623 days 0%
John & Lorraine 8/10 3908 days 14%
Juergen Wolf 9/10 3919 days 15%
Malcolm McLean 8/10 3919 days 14%
Erin 6/10 3920 days 13%
Laurie Smith 8/10 3920 days 14%
David Mellard 10/10 3921 days 15%
Zuur 8/10 3926 days 14%
Paul Smith 8/10 3935 days 14%
Robert Haidt 10/10 3950 days 15%
Robin Schomburg 10/10 3954 days 15%
Lizzie 10/10 4019 days 15%
Rosey834 10/10 4019 days 15%
Margie 10/10 4272 days 15%
Kerry Wood 10/10 4296 days 15%
Giaque 5/10 4300 days 12%
Chris & Dawn Humphries 9/10 4301 days 15%
Maria Newton 8/10 4304 days 14%
J Kempeneers 8/10 4308 days 14%
Beverly B 8/10 4336 days 14%
ianc 10/10 4376 days 15%
koellner 4/10 4382 days 12%
Deede K 9/10 4392 days 15%
Kathrin Thomas 8/10 4396 days 14%
Ruth Kinder 10/10 4414 days 15%
harryb 8/10 4493 days 14%
regw 10/10 4504 days 15%
gerrys 8/10 4583 days 14%
streneer 10/10 4615 days 15%
SSheil 10/10 4616 days 15%
Mike 7/10 4632 days 14%
Roy 9/10 4632 days 15%
A 10/10 4659 days 15%
SimonR 9/10 4662 days 15%
VacherD 8/10 4663 days 14%
Paul 7/10 4671 days 14%
john west 8/10 4696 days 14%
jonathan 9/10 4749 days 15%
martina 8/10 4825 days 14%
Esther 6/10 4834 days 13%
Helen 9/10 4978 days 15%
Liz 9/10 5011 days 15%
Sue 6/10 5346 days 13%
Cat 5/10 5358 days 12%
Franz-Josef 9/10 5410 days 15%

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

80%

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.