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 Driving Creek Railway & Potteries.

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

Driving Creek Railway & Potteries

Valid Reviews

92 Valid Reviews

The Driving Creek Railway & Potteries experience has a total of 93 reviews. There are 92 valid reviews that are included when calculating the ranking score and 1 invalid review 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 92 valid reviews:

Rating Count Percentage
10/10 31
34%
9/10 20
22%
8/10 25
27%
7/10 8
9%
6/10 1
1%
5/10 4
4%
4/10 2
2%
3/10 1
1%
2/10 0
0%
1/10 0
0%

85.11% Average

The raw data average (mean) for all the Driving Creek Railway & Potteries valid reviews is 85.11% and is based on 92 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

81 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 92 valid reviews, the experience has 81 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 81 face-to-face reviews:

Rating Count Percentage
10/10 27
33%
9/10 18
22%
8/10 22
27%
7/10 7
9%
6/10 1
1%
5/10 3
4%
4/10 2
2%
3/10 1
1%
2/10 0
0%
1/10 0
0%

85.06% Average

The raw data average (mean) for all the Driving Creek Railway & Potteries face-to-face reviews is 85.06% and is based on 81 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

86.13%

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
Richard Webb 10/10 852 days true 17.23 100%
Colin George 10/10 902 days true 13.08 75%
Vanuxem 3/10 1149 days true 5.47 30%
Camilla Geert 5/10 1159 days true 5.89 33%
Manibod Vannaphone 8/10 1176 days true 5.87 32%
Stephan Friedrich 10/10 1196 days 4.86 26%
Frank 8/10 1208 days true 5.81 32%
Tatiana Racheneau 10/10 1222 days true 5.79 32%
Liz and Alan Weathers 8/10 1582 days true 5.2 28%
Phil Bromby 10/10 1907 days true 4.67 25%
Helen 10/10 1910 days 3.88 21%
Jonas Nielsen 4/10 1916 days true 4.38 24%
Karel 9/10 1926 days true 4.63 25%
FlyingKiwiGirl 8/10 2275 days 3.38 18%
Emmanuel Tedeschi 7/10 2277 days true 4.06 22%
Soren and Inelase Lindhardbell 10/10 2347 days true 3.94 21%
Soren and Inelase Lindhardbell 10/10 2347 days true 3.94 21%
Marian 8/10 2367 days true 3.91 21%
Jonathan Tuthill 10/10 2625 days true 3.48 18%
Goran Backlund 8/10 2625 days true 3.48 18%
Burkard Fabu 10/10 2632 days true 3.47 18%
Susanne A 10/10 2637 days true 3.47 18%
Peter Hart 8/10 2637 days true 3.47 18%
Johann Maier 10/10 2653 days true 3.44 18%
pamr 10/10 2653 days true 3.44 18%
Colin Philpott 9/10 2662 days true 3.42 18%
John Reynolds 9/10 2664 days true 3.42 18%
R Laurysen 7/10 2666 days true 3.42 18%
Mike1952 8/10 2669 days 2.84 14%
Fred Saunders 10/10 2695 days true 3.37 17%
Vbeirne 9/10 2700 days 2.8 14%
hendrik king 7/10 2731 days 2.76 14%
Andreas & Sonja 8/10 2747 days true 3.28 17%
Anders Rathleff 8/10 2747 days true 3.28 17%
R & M Willows 10/10 2748 days true 3.28 17%
Schroeder 9/10 2994 days true 2.88 15%
Jackie MacRostie 9/10 2996 days true 2.88 15%
Krabbe 8/10 2997 days true 2.87 15%
Diete Rokosch 10/10 3007 days true 2.86 14%
Mirka Tinterova 10/10 3008 days true 2.86 14%
J Blake 9/10 3010 days true 2.85 14%
Pieter 8/10 3011 days true 2.85 14%
George Lepple 10/10 3364 days true 2.27 11%
Mr and Mrs Scott 5/10 3371 days 1.88 9%
Tony Killingray 9/10 3374 days true 2.25 11%
Heike Pless 10/10 3380 days true 2.24 11%
Ronja Op 4/10 3395 days true 2.09 10%
Carol Dale 9/10 3397 days true 2.22 11%
Carolina Gonzalez 9/10 3397 days true 2.22 11%
Ines Diana 10/10 3398 days true 2.21 11%
asiacritics 8/10 3461 days 1.76 8%
Anita de Boer 9/10 3463 days true 2.11 10%
dirkdev 9/10 3465 days true 2.1 10%
Bill Nash 9/10 3465 days true 2.1 10%
rolandop 8/10 3465 days true 2.1 10%
Vanessa 10/10 3472 days true 2.09 10%
Karen & Ian 10/10 3472 days true 2.09 10%
Hennie Neeleman 9/10 3473 days true 2.09 10%
Pieter Neeleman 8/10 3473 days true 2.09 10%
Mareike G 7/10 3473 days true 2.09 10%
Josie Boyle 5/10 3633 days true 1.83 8%
Katy Boyle 5/10 3633 days true 1.83 8%
joyceb 10/10 3660 days true 1.78 8%
Charles Lyne 9/10 3675 days 1.47 6%
BouterG 7/10 3701 days true 1.72 8%
Kaye 10/10 3705 days true 1.71 8%
caroldarren 10/10 3705 days true 1.71 8%
JanL 10/10 3705 days true 1.71 8%
LandR 10/10 3706 days true 1.71 8%
JaneM 9/10 3711 days true 1.7 8%
Erik 8/10 3728 days true 1.67 7%
Grimm 9/10 3729 days true 1.67 7%
Darren Main 10/10 3736 days 1.38 6%
RichardE 9/10 3740 days true 1.65 7%
CarolF 10/10 3740 days true 1.65 7%
Ian S 7/10 3755 days true 1.63 7%
Rona 8/10 3756 days true 1.63 7%
Nanno 8/10 3756 days true 1.63 7%
Miranda 7/10 3782 days true 1.58 7%
Kirsten 8/10 3818 days true 1.52 7%
olland 8/10 3826 days true 1.51 6%
carl_fagan 10/10 3980 days 1.05 4%
Anne and Derek 8/10 4097 days true 1.07 4%
Andria Davis 9/10 4098 days true 1.06 4%
Richard Steward 10/10 4102 days true 1.06 4%
Marc Hertogs 7/10 4121 days true 1.03 4%
Seldam 6/10 4153 days true 0.97 3%
Monika 8/10 4180 days true 0.93 3%
Rietveld 9/10 4463 days true 0.46 0%
beesom 8/10 4471 days true 0.45 0%
Rolf 8/10 4483 days true 0.43 0%
Nicole 8/10 4483 days true 0.43 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 Driving Creek Railway & Potteries experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-7.28% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the Driving Creek Railway & Potteries 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 364 days.

The Driving Creek Railway & Potteries experience has been adjusted for 364 days. Adjustments are according to the following table.

Days Adjustment
361 -7.22%
362 -7.24%
363 -7.26%
364 -7.28%
365 -7.30%
366 -7.32%
367 -7.34%

Final Ranking Score

79%

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.

Love Christchurch