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Reach - expressed as a percentage, reach is the number of individuals (or homes) to expose the product to through media scheduled over a period of time. •
Frequency - using specific media, how many times, on average, should the individuals in the target audience be exposed to the advertising message? It takes an average of three or more exposures to an advertising message before consumers take action. •
Cost per thousand - How much will it cost to reach a thousand prospective customers (a method used in comparing
print media)? To determine a publication's cost per thousand, also known as
CPM, divide the cost of the advertising by the publication's circulation, multiplied by its reader's per copy, in thousands. For example, magazine A's audited circulation is 250,000 with an audited readers per copy, or RPC of 3.5. A full-page ad in the magazine costs $45,000. Therefore, CPM = $45,000 / (1,000,000 x 3.5) x 1000. So, Magazine A's CPM = $12.85. Using CPM for evaluating media makes it an, “apples to apples” comparison. •
Cost per point - how much will it cost to buy one rating point of your target audience, a method used in comparing broadcast media. One rating point equals 1 percent of the target audience. Divide the cost of the schedule being considered by the number of rating points it delivers. •
Impact - does the medium in question offer full opportunities for appealing to the appropriate senses, such as sight and hearing, in its
graphic design and production quality? •
Selectivity - to what degree can the message be restricted to those people who are known to be the most logical prospects?
Reach and
frequency are important aspects of an advertising plan and are used to analyze alternative advertising schedules to determine which produce the best results relative to the media plan's objectives. Generally speaking, you will use reach when you are looking to increase your consumer base by getting more people buying your product and you will privilege frequency when you need to narrow down your communication to a more specific audience but need to increase the number of times they could be exposed to your message in order to generate a change in behavior. Calculate reach and frequency and then compare the two on the basis of how many people will be reached with each schedule and the number of times the ad will connect with the average person. Let's say the ad appeared in each of four television programs (A, B, C, D), and each program has a 20 rating, resulting in a total of 80 gross rating points. It is possible that some viewers will see more than one announcement—some viewers of program A might also see program B, C, or D, or any combination of them. For example, in a population of 100 TV homes, a total of 40 are exposed to one or more TV programs. The reach of the four programs combined is therefore 40 percent (40 homes reached divided by the 100 TV-home population). Researchers have charted the reach achieved with different media schedules. These tabulations are put into formulas from which the level of delivery (reach) for any given schedule can be estimated. A reach curve is the technical term describing how reach changes with increasing use of a medium. Now assume the same schedule of one commercial in each of four TV programs (A, B, C, D) to determine reach versus frequency. In our example, 17 homes viewed only one program, 11 homes viewed two programs, seven viewed three programs, and five homes viewed all four programs. If we add the number of programs each home viewed, the 40 homes in total viewed the equivalent of 80 programs and therefore were exposed to the equivalent of 80 commercials. By dividing 80 by 40, we establish that any one home was exposed to an average of two commercials. To increase reach, include additional media in the plan or expand the timing of the message. For example, if purchasing "
drive time" on the radio, some daytime and evening spots will increase the audience. To increase frequency, add spots or insertions to the schedule. For example, if running three insertions in a local magazine, increase that to six insertions so that the audience would be exposed to the ad more often.
Gross rating points (GRPs) are used to estimate broadcast reach and frequency from tabulations and formulas. Once the scheduled delivery has been determined from reach curves, obtain the average frequency by dividing the GRPs by the reach. For example, 200 GRPs divided by an 80 percent reach equals a 2.5 average frequency. == Reach and Frequency ==