Rating

A rating is the evaluation or assessment of something, in terms of quality (as with a critic rating a novel), quantity (as with an athlete being rated by his or her statistics), or some combination of both.

Rating may also refer to:

Wine rating

A wine rating is a score assigned by one or more wine critics to a wine tasted as a summary of that critic's evaluation of that wine. A wine rating is therefore a subjective quality score, typically of a numerical nature, given to a specific bottle of wine. In most cases, wine ratings are set by a single wine critic, but in some cases a rating is derived by input from several critics tasting the same wine at the same time. A number of different scales for wine ratings are in use. Also, the practices used to arrive at the rating can vary. Over the last couple of decades, the 50-100 scale introduced by Robert M. Parker, Jr. has become commonly used. This or numerically similar scales are used by publications such as Wine Enthusiast, Wine Spectator, and Wine Advocate. Other publications or critics, such as Jancis Robinson and Michael Broadbent, may use a 0-20 scale, or a 0-5 scale (often in terms of numbers of stars) either with or without half-star steps.

In recent years, with the advent of aggregated user-generated ratings, there has also proliferated group rating systems, such as the one employed by CellarTracker, using input from non-professional wine tasters who taste under differing conditions. In addition to a simple numerical score, most wine ratings are meant to supplement the wine tasting notes, which are brief descriptions of the wine critic's overall impression of the wine, including its flavor qualities. However, often the emphasis (in particular in marketing) is on the score applied by a critic rather than on the total wine tasting note.

Audience measurement

Audience measurement measures how many people are in an audience, usually in relation to radio listenership and television viewership, but also in relation to newspaper and magazine readership and, increasingly, web traffic on websites. Sometimes, the term is used as pertaining to practices which help broadcasters and advertisers determine who is listening rather than just how many people are listening. In some parts of the world, the resulting relative numbers are referred to as audience share, while in other places the broader term market share is used. This broader meaning is also called audience research.

Measurements are broken down by media market, which for the most part corresponds to metropolitan areas, both large and small.

Methods

Diaries

The diary was one of the first methods of recording information. However, this is prone to mistakes and forgetfulness, as well as subjectivity. Data is also collected down to the level of listener opinion of individual songs, cross referenced against their age, race, and economic status in listening sessions sponsored by oldies and mix formatted stations. IBOPE was the first realtime service for audience measurement of the world, it started in São Paulo in 1942.