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 Drive NZ Rental Vehicles.

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

Drive NZ Rental Vehicles

Valid Reviews

51 Valid Reviews

The Drive NZ Rental Vehicles experience has a total of 53 reviews. There are 51 valid reviews that are included when calculating the ranking score and 2 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.

Within these 51 valid reviews, the experience has 3 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 51 valid reviews:

Rating Count Percentage
10/10 14
27%
9/10 10
20%
8/10 4
8%
7/10 1
2%
6/10 0
0%
5/10 0
0%
4/10 0
0%
3/10 1
2%
2/10 0
0%
1/10 21
41%

57.45% Average

The raw data average (mean) for all the Drive NZ Rental Vehicles valid reviews is 57.45% and is based on 51 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.

Weighted Average

24.82%

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
Erica L 1/10 23 days 72.94 100%
Pip Summerville 1/10 115 days 71.47 98%
Never Again 1/10 207 days 68.04 93%
Nikki Schumaker 1/10 238 days 66.45 91%
raymond bennett 1/10 299 days 62.66 86%
Alan Manson 3/10 329 days 63.79 87%
Kevin Holland 1/10 329 days 60.48 83%
SeanB 1/10 388 days 55.59 76%
Ulrich Ackermann 1/10 388 days 55.59 76%
Tim 1/10 419 days 52.69 72%
Shiven 1/10 572 days 35.29 48%
Ian from Brisbane 9/10 572 days 48.34 66%
Julie 1/10 725 days 19.49 27%
Hayley Pullyn 10/10 753 days 23.53 32%
Chelsea 1/10 753 days 17.18 24%
Dan Turner 10/10 815 days 17.42 24%
Ingrid Johansen 1/10 875 days 9.25 13%
Ellie Cumming 1/10 967 days 5.55 8%
Bo Yang 10/10 997 days 6.52 9%
Clinton Whyte 1/10 1148 days 3.57 5%
Sam Aussie 1/10 1148 days 3.57 5%
Christine Young 10/10 1423 days 4.36 6%
DanielNZ 1/10 1454 days 3.14 4%
Michael NZ 10/10 1454 days 4.3 6%
Cameron Jeal 8/10 1543 days true 3.92 5%
Kylie May 9/10 1575 days 4.06 6%
Keely Laycock 1/10 1576 days 2.96 4%
Bette Middly 9/10 1576 days 4.06 6%
Ian Bright 10/10 1728 days 3.76 5%
Jean L 9/10 1848 days 3.53 5%
Nick Masters 1/10 1910 days 2.49 3%
WellyTourist 1/10 1910 days 2.49 3%
gordygreenbat 10/10 3129 days 1.02 1%
TonyN 8/10 3129 days 0.97 1%
Quantum 9/10 3129 days 1.02 1%
DavidS 10/10 3129 days 1.02 1%
jules012 10/10 3129 days 1.02 1%
NBartosh 10/10 3129 days 1.02 1%
VickiR 10/10 3129 days 1.02 1%
rgb 10/10 3129 days 1.02 1%
rogb 9/10 3129 days 1.02 1%
kawasaki69 10/10 3160 days 0.96 1%
cordwell 10/10 3160 days 0.96 1%
brianpatrick 9/10 3282 days 0.72 1%
Ross Hughes 8/10 3301 days true 0.65 1%
steelreserve 9/10 3310 days 0.67 1%
fumba 9/10 3341 days 0.6 1%
Chris_Hazel 8/10 3372 days 0.52 1%
Paul Frew 9/10 3684 days true 0.0 0%
hogey74 7/10 3737 days 0.0 0%
JustATraveller 1/10 4063 days 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 Drive NZ Rental Vehicles experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-2.89% Adjustment

Recent reviews reflect the experience as it currently operates. This means it's important to get fresh reviews. Some experiences discovered they could get a few good reviews and then, resting on their laurels, discourage any further reviews. This adjustment stimulates experiences to be positively involved in the review generating process and discourages them from manipulating the ranking system in this manner. There may be an adjustment if an experience hasn't received any reviews within the last 60 days.

The Drive NZ Rental Vehicles experience has 1 recent ranking. Adjustments are according to the following table:

Recent Reviews Adjustment
0 -3.00%
1 -2.83%
2 -2.33%
3 -1.50%
4 -0.67%
5 -0.17%
6 -0.00%

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 199 days.

The Drive NZ Rental Vehicles experience has been adjusted for 3 days. Adjustments are according to the following table.

Days Adjustment
0 -0.00%
1 -0.02%
2 -0.04%
3 -0.06%
4 -0.08%
5 -0.10%
6 -0.12%

Final Ranking Score

22%

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.