Our tables rating individual companies will be more valuable
to you if you know how the data were gathered and how they should be
We regularly survey area CHECKBOOK and Consumer
Reports subscribers for their feedback on services they have used. We
sometimes also survey subscribers to various other websites and publications
and survey a sampling of other area consumers. On our surveys, we ask consumers
to rate their experiences with companies they had most recently used on several
aspects of service. Our ratings tables show the percent of each company’s
surveyed customers who provided a rating of “superior” (as opposed to
“inferior” or “adequate”) for questions on our survey. We sometimes also report
the percent of surveyed customers who rated each company “adequate” or
“superior” (as opposed to “inferior”) for the “overall quality” question on our
We have included on our ratings tables all of the companies
for which we received at least 10 ratings on our customer surveys. If a company
is not listed on our ratings tables, it simply means we did not receive at
least 10 ratings for it.
Since many companies were rated by rather small numbers of
raters, small differences between two firms in the percentage of raters who
gave a particular rating (say, “superior”) should be ignored. The table below
gives a rough guide to minimum differences you should look for in deciding on
one company over another.
When using these survey data, remember that the questions
are to some degree subjective and that the differences among companies might be
explained by differences in the personalities, backgrounds, critical standards,
and other characteristics of the raters or by biases these raters might have.
To compute our price index scores, we calculated an average
price for each job or item for all the companies that quoted on that job or
item. Next we compared each company’s price to the average. One company might
come in at 120 percent of the multi-company average for a particular job, and
another company might come in at 90 percent. We took each company’s percentage
score on each job or item, standardized it, and assigned a weight to each job
or item, based on our judgment. We then averaged the standardized, weighted
percentage scores to find how the company compared to other companies overall.
Finally, we multiplied this overall percentage score by a flat dollar amount,
The price index score, then, is intended to indicate the
relative prices we found for the companies, adjusted to the base of this flat
dollar amount. These index scores are imperfect for various reasons: for
instance, the jobs or items checked may not be representative; the weighting of
various jobs or items in the index may not accurately reflect typical
expenditure patterns; and the number of jobs or items is small.
All of the data must be interpreted in view of timeliness. Our customer survey data are from surveys conducted from January 2005 to February 2015. Survey respondents were asked to report on experiences in the preceding
year. Our price data were collected from October 2012 to February 2013.
For the most part, our tables include companies for which we
collected 10 or more ratings on our customer survey during the customer survey
period mentioned above, but we do not report data for periods prior to
companies’ changes of name and ownership. As a result, some large companies are
not listed at all. If only name or ownership changed, we do report the data.
Changes subsequent to the dates listed above may not be taken into account.
We give checkmarks to companies that score highest on a
scoring system that we devise for each service field. Our scoring systems
weight the various data in our tables and text based on our subjective judgment
of their importance. Since the scores are based entirely on information
presented, you can apply your own subjective judgments, and decide whether you
prefer companies we have not given checkmarks. Where we do not have important
data on a company, we cannot give our checkmark.
|Assuming the average of the two companies' percentages is 50 percent
|Assuming the average of the two companies' percentages is 80 percent