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Friday, June 06, 2014 #8980
Hello Guru, i want to ask you about TV reach & frequency. Suppose i have following GRPs : 766 Add Spots :2,939 Number of Spots Affinity Index : 111 then how can we calculate reach & frequency with out using software....please let me know !!!!!

The Media Guru Answers(Tuesday, June 10, 2014 ):
This can't be done with the information provided.

Sunday, April 13, 2014 #8959
please what are the differences between business, marketing, communication and media objectives?

The Media Guru Answers(Sunday, April 13, 2014 ):
Very simplistically,
  1. Business objectives drive marketing objectives.
  2. Marketing objectives drive communications objectives.
  3. Parts of communications objectives drive media objectives.
  4. Media objectives will address who should be reached, in what media environment, in what geographic areas, with what budget, etc. Among the media objectives will be communications objectives which would specify such details as reach & frequency goals, ad awareness goals, etc. These will have been derived from the commincations obectives mentioned in point 3, above.
  5. Marketing objectives will describe broadscale issues like brand building, promotional efforts, public relations, consumer relationships,etc.
  6. The communications objectives that follow from this will address targets, awareness, imagery and so forth.
  7. The business objectives leading up to all this will include sales and market share goals, brand plans and more.
Also see the Guru's Parts of a Media Plan

Thursday, December 05, 2013 #8916
It is often unclear what the population base is of a Web media plan I am being sold. What are the criteria I should be looking for and how should I determine that population base?

The Media Guru Answers(Thursday, December 05, 2013 ):
Whenever a media plan is being sold to you whether web or traditional, the plan should contain a description of the population base of the evaluation. That base may be total population or a target base such as total beer drinkers or total woman 18-34. For web planning it is especially important to be sure whether your base is total population or total target population not total web population or total target web population. If all you are given are the GRPs, Gross Impressions or reach & frequency, you can determine what the population base size is by using these simple formulas: Impressions(000) GRPS .01 = Population(000) GRPS = Reach x Frequency Once you determine the size you should check to see what that number represents.

Wednesday, May 02, 2012 #8650
compare donovan and telmar

The Media Guru Answers(Wednesday, May 02, 2012 ):
Donovan (now MediaOcean) is primarily a stewardship system. It processes data like Nielsen ratings and vendor invoices to facilitate media buying and post analysis / billing.

Telmar is more oriented to media planning; processing various media survey data (Nielsen, MRI, Simmons, etc.) to facilitate media selection decisions, advertising targeting analysis, plan reach & frequency and the like.

Monday, November 14, 2011 #8292
Is there an online standard for reach & frequency?

The Media Guru Answers(Tuesday, November 15, 2011 ):
Not specifically. It would depend on whether there are other media. Whether online is the primary medium and other media are driving traffic. Or whether the online is traffic-driving itself or stand alone ecommerce, etc.

Wednesday, September 07, 2011 #8207
reach & frequency

The Media Guru Answers(Tuesday, September 13, 2011 ):
Click here to see over 200 past Guru responses about reach and frequency. Click here to see over 30 past Guru responses about "reach & frequency", Click here to see over 75 past Guru responses about R & F.

This is one of the most common Guru topics. Perhaps you can narrow your quesiton

Tuesday, May 17, 2011 #7886
Multi Week reach & frequency I'm having trouble totaling R & F across a 4 week period when ratigns are different across the weeks. We tie back to individual program for a single week but not the total 4 weeks. Everything totals fine when ratings are the same across all weeks. I have a 4 week schedule with 1 program Fri 10-11p Daypart Prime Telmar DPT # 6 Demo M1849 July 2010 Book cume data Avg rating Sign on to sign off Cume rtg avg: 391 Primetime Cume Rtg avg: 204 week 1 2 spots 0.9 rtg Reach 1.8 Freq 1.0 week 2 1 spot 1.6 rtg Reach 1.6 Freq 1.0 week 3 1 spot 1.6 rating Reach 1.6 Freq 1.0 week 4 3 spot 0.5 rating Reach 1.5 Freq 1.0 Trying to tie numbers to another company using the same Telmar model they have a 4 week total 4.5 Reach and a 1.4 Frequency. We get a 3.8 Reach and 2.1 Frequency using both an avg rating and a weighted average ratings. What else could we try to tie back to them we have an array for spots by weeks but only one rating for all the weeks???? Thanks in advance

The Media Guru Answers(Tuesday, May 17, 2011 ):
In the data you present, each week shows some inherently incorrect data, which makes the Guru suspect your input. But before the Guru points out these problems, it should be mentioned that trying to fine tune reach at such extremly low levels seems pointless. A reach difference of 0.7% is unlikely to be real within statistical tolerances, anyway.
  • In week 1, two spots having no duplication and exactly 1.0 frequency is unlikely
  • Regarding weeks 2 & 3, a single spot cannot have any duplication, so reach will exactly equal rating for any single spot, anywhere. Further, reach can never be greater than GRP. And, Frequency can never be less than 1.0; (i.e. anyone reached is reached at least once) your 1.8 reach and 1.6 GRP would yield and impossible 0.888 frequency
  • In week 4,similarly, you have an impossible 1.5 GRP and 1.8 reach.
The Guru does not understand how "Cume rating" has any place in this discussion, nor "weighted average ratings"

Thursday, August 05, 2010 #7793
How can i calculate reach & frequency for radio?

The Media Guru Answers(Monday, August 09, 2010 ):
It's a complex calculation and calls for computer support. Our own eTelmar is a great choice.

Thursday, September 18, 2008 #7602
I have a client who would like us to calculate the combined reach & frequency for a cable, spot radio and traffic radio campaign. Without a media mix program, how can I calculate reach & frequency across these various mediums? Are there standard formulas that I should be using?

The Media Guru Answers(Sunday, September 21, 2008 ):
Click here to see past Guru responses regarding combining reaches.

Wednesday, February 21, 2007 #7288
Hi Guru, Excellent Guru. Could you give name(s) of "media planning models" particularly "online media planning models". It is appreciable if you can give details and or point to any resources like what you did for the previous query. Once again thanks for precise answer. Best Regards, Shaiju Jose

The Media Guru Answers(Wednesday, February 21, 2007 ):
The Guru assumes that you are again thinking of reach analysis models. Try our own eTelmar WebPlanner, which is described as:

"WebPlanner - is the first software tool that lets you completely evaluate website schedules in terms of targeting, impressions, reach & frequency, cost efficiency, and timing. WebPlanner allows you to build your own site-centric audience database. You can easily import any syndicated web data that you subscribe to such as Comscore Media Metrix2 to create internet schedule buys. You can build and prototype web sites using syndicated data or create your own! "

eTelmar offers models for all media and media mix.

Friday, July 01, 2005 #6964
What is the relationship between reach & frequency in the US to reach & frequency in Canada? For example, if a flight in the US has 325 GRPs and gets 38% 1+ reach and 17% 3+, how could I adjust those so they correlate to a similar flight in Canada?

The Media Guru Answers(Sunday, July 03, 2005 ):
There is no simple or specific relationship. Each country and each culture with its own media within a country (e.g. the US Hispanic market) have different reach curves. The different daypart cumes, rating sizes, numbers of vehicles within a medium, etc. contribute to reach derived from GRPs. It's not magic, it's generalizations from measured, consumer media behavior.

Thursday, June 09, 2005 #6947
We have put together a campaign consiting of print & television in a few spot markets. Is it possible to determine the reach & frequency for those persons who will only see the TV and only see the print? How is it possible to know who has seen only print & only TV?

The Media Guru Answers(Saturday, June 11, 2005 ):
  1. Calculate TV reach
  2. Calculate print Reach
  3. Calculate combined reach (presumably, you have gotten this far)
Now it's simply addition and subtraction:

Suppose you have found the following:

TV reach = 50
Print Reach = 40
Combined reach = 70.

Therefore, 20 reach points of the print are added to TV (saw only print) and 20 duplicated (also saw) TV.

Further, 30 points of the TV are added to print (saw TV only), and that same 20 points as above are duplicated.

So it breaks down to

TV only = 30 reach points
Print only= 20 reach points
saw both = 20 reach points
Total reach = 70

Monday, May 23, 2005 #6931
Hi, I want to know you point of view about what william arens says about reach & frequency

The Media Guru Answers(Monday, May 23, 2005 ):
The Guru has not read Arens' textbook. Available blurbs indicate it is about creative more than media issues.

Monday, May 23, 2005 #6930
what is reach & frequency?

The Media Guru Answers(Monday, May 23, 2005 ):
Go to the Guru Archives Search Engine. Use " reach and frequency | reach & frequency" as your search term.

Tuesday, May 17, 2005 #6926
reach & frequency

The Media Guru Answers(Friday, May 20, 2005 ):
Click here to see Click here to see over 200 past Guru responses refererring to Reach and Frequency

Tuesday, April 20, 2004 #6465
For a new entrant with a small budget in a high spending category, 1)What should be prioritised in terms of Reach, Frequency or , Continuity at the expense of reach & frequency. 2)Is there a rule of thumb to set higher weight than competitors atleast in the launch month for better vicibility & cut thru at the expense of number of maintenance bursts.

The Media Guru Answers(Saturday, April 24, 2004 ):
The Guru always recommends 'outshouting' competition. For a new entrant with awareness issues this is all the more important.

Continuity can be a uniquely powerful technique if competion is flighted; a careful study of competitors' flighting patterns might show when to be the big noise in a loud field.

Another technique is geographic selection. If your budget does not allow making enough noise nationally or in a big region, it is wisest to begin in a smaller geographic area where your campaign can have significant share of voice.

Going directly to your question, the Guru would priorize continuity over reach and frequency, if you can achieve at least a minimum R&F; perhaps 30% reach.

Wednesday, January 14, 2004 #6339
What is considered effective for online advertising in terms of reach & frequency?

The Media Guru Answers(Sunday, January 18, 2004 ):
If you consider online advertsing by itself, why would it have a different effective R&F standard?

Realistically of course, it must. If only two-thirds of people are online, that sets an upper limit. With the millions of web sites fragmenting this audience, what portion of this universe0 can realistically be reached?

Even granting that giants like Yahoo may reach most internet users, what portion of Yahoo's reach can you afford to buy?

In the Guru's opinion, online is a tactical medium. It can reach key prospects in environmentally focused contexts with selectively delivered messsages. It can reach people or add frequency among people not otherwise accessible.

Wednesday, March 19, 2003 #5888
I'd like to know how you determine what your GRP goals should be for TV. I know that Total GRP's are equal to reach x frequency. However, if I want to reach 95% of adults 35+ each flight month while achieving a 4.0 weekly frequency, how do I determine those goals? Thank you.

The Media Guru Answers(Saturday, March 22, 2003 ):
The fact that reach x frequency = GRP is merely an arithmetic relationship, it is not predictive. Not all combinations of dayparts and programs with the same total GRP deliver the same R&F.

You need to examine various schedules with reach & frequency software, such as that from our sister company, Telmar.

Saturday, March 08, 2003 #5871
Dear Guru, I encounter some more questions which I am unsure. I learnt that we can calculate combined reach of different media vehicles in one medium and combined reach of different media (e.g. TV, Magazine etc.) and same for frequency. However, how can I applied tohse in an advertising flowchart? where I need to indicate monthly reach, monthly frequency and GRPs for different media vehicles+media (?) To do it manually, do we really calculate first combined reach and frequency of all media vehicles within 1 medium first than use the final combined reach % to calculate with other media to get the Montly reach & frequency & grps in the adv will be quite tedious....I am confused...please help!

The Media Guru Answers(Sunday, March 09, 2003 ):
The Guru does not understand your confusion. You say you understand how to calculate the reach of several vehicles in one medium and how to combine the reaches of several media.

One thing you must understand is that reach is always calculated over a specified period of time. The standard period is four weeks. Often, when print is the only medium involved, one month is used because this is virtually the same as four weeks and monthly magazines fit readily. However, it should be recognized that variations in issue dates muddy the time cycle, and that monthly magazines' audiences cume over a longer period than one month.

In any case, whether the flow chart is divided into 12 months or 13 four-week periods, the process is simply a matter of looking at the schedule that will run in each of these periods and calculating the R/F/GRP for each. The is not any kind of standard that establishes that a flow chart should show R&F for every month. When schedules are fairly consistent, it is probably more common to show the average 4-week R&F within each quarter, or whatever is needed to give a clear understanding of the plan's communications levels.

And yes, if you are doing the work manually, it is tedious.

Saturday, February 15, 2003 #5841
Can you please tell me how to do the Sainsbury formula in order to calculate campaign reach & frequency?

The Media Guru Answers(Monday, February 17, 2003 ):
Click here to see past Guru responses about Sainsbury.

To do the kind of calculation you probably want, you need a computer with software such as that offered by Telmar.

The calculation is extremely complex. For example, in print, as input, you need average issue audience, duplication between issues of the same publication and duplication between each possible pair of different publications. These must be combined using a complex formula such as the Beta-binomial function. There are variants of this formula, which might be preferred, depending on media type and other variables

Tuesday, November 20, 2001 #4900
I am trying to estimate past reach & frequency for a transportation trade industry print campaign -- and based on that set R&F goals for 2002. I have gathered the following information: Target universe in US, Asia and Europe; each publication's circulation to that target (where available); duplication (very limited availability of this from these pubs). Given this information, what formula could I use to (gu)estimate reach & frequency for this Trade plan? Alternatively, what other measures could I offer to my client to measure a recommended media plans effectiveness (i.e. Competitive SOV)?

The Media Guru Answers(Wednesday, November 21, 2001 ):
The simple formula begins by calculating audience-divided-by-universe to estimate ratings (probability of exposure). Multiplying together all the negative probabilities gives you the reach, disregarding specific duplication. In other words, if you get a rating of 14% of target, the negative probability is 86%. Then, two issues of that publication have a combined negative probability of 0.86 X 0.86 or 0.7396. Thus the probable "reach" is 1 - 0.7386 or 26%. This reflects a rando likelihood of dulication of roughly 14%. In reality, there is more than just this random duplication between two issues of the same trade title, probably 50%+, so a better estimate of the reach would be 14% + 50% of 14%, or 21% reach.

For a good guestimate, combine all your insertions this way, using 60% duplication between repeats in the same title and 30% between different titles. Use judgement about titles from different countries which may have virtually no mutual duplication.

SOV is another comparitive tool. Going beyond relative communication and relative spending gets quite speculative.

Monday, November 05, 2001 #4865
Guru, what's the methodology for reach & frequency. I have two schedules, one gets an 77 reach/3.1 freq, the other 85 reach/4.2 freq. and a cume of 87 reach/5.6 freq. A client just asked why such a small increase from year to year.

The Media Guru Answers(Wednesday, November 07, 2001 ):
The Guru's answer is based on the assumption that you mean:

"In year 1, I ran a schedule which cumed 77 reach, with 3.1 average frequency (and presumably about 240 GRP), and

In year 2, I ran a schedule with a cume reach of 85, and an average frequency of 4.2 (about 360 total GRP), and

the cume across the two years reported as 87 reach / 5.6 average frequency (487 GRP). So why is this cume only 87 when I had 85 in year 2 alone, on top of the 77 in year 1?


  1. First, if the cume is the combination of the two schedules, there is an arithmetic error somewhere in the cume. The GRP (reach X frequency) of the cume must be the sum of the two individual schedules, which would be about 600 GRP.
  2. Reach grows more slowly as you near the potential. Why? When you reach 85% of the target, most of the people reached are among the 77% you reached previously. At it's simplest, based on pure probability, your 85% reach in year 2 means that year 2's schedule reaches 85% of the 77% already reached and 85% of the 23% not yet reached. This would add 20% to year 1's 77% for a cume of 97%. But the nature of media is that some people consume some media regularly and others not at all. So duplication in a given medium is more than pure probability. Thus reach is only 87% in cume.
  3. If you had used completely different media in each year the cume would more nearly apporach the 97% probability.
Reach methodology differs between media types.

Wednesday, October 24, 2001 #4819
I know you have addressed this question many times, but I could not find an answer to help me in your archives. How can I determine reach & frequency for my television buy without buying software? I do not know reach or frequency, only total TRP's. Please help.

The Media Guru Answers(Wednesday, October 24, 2001 ):
Reach and frequency is a complex calculation. Without software, only tables of results based on averaging actula caluculation will be helpful. Complexities of dayparts, demographics, and timing can mean a 2:1 range in results for the same GRP. If the media vendors can't help you, eTelmar is a low-cost, pay-per-use alternative.

Thursday, August 09, 2001 #4648
Guru, I'm trying to figure out a reach & frequency of magazines which aren't measured. For discussion purposes, lets say my target base was 100,000. I am recommending 5 magazines with a total circ. of 80,000. However, I will be running in each about 5X over the course of 1 year. To make matters worse, I have no idea of the duplication between these mags. Without measured media, how do I figure an approx. R&F?

The Media Guru Answers(Saturday, August 11, 2001 ):
The first step to a crude estimate is to determine the target readers-per-copy (RPC of your largest circ book. With an average of 16,000 ( your 80,000 total across all 5), perhaps one is double the average or 32,000. If it has 2 target rpc, or 64,000 then your reach minimum is 64%. If all the books average 2 rpc, your schedule of 5 insertions in each of the 5 books has 320,000 impressions or 320 GRP in a base of 100,000.

Assume each additional title adds at least one reach point. Now your reach will be somwhere between 68% and 95% (arbitrary upper limit). With 320 GRP, your Reach / Freq is now somewhere between 68 / 4.7 and 95 / 4.3. Refining your rpc may narrow the range.

Or, if you have circ and rpc estimates, Telmar has software which can produce better projections.

Tuesday, July 24, 2001 #4603
I was wondering if you have any ideas were I may be able to find some sort of template for RFPs that involve media buying like requesting C.P.P. or reach & frequency? We have been working on many media bids for a department of the state and they do not request specific media numbers so the media buyers are only submitting the information that makes their plan look the most favorable. We wanted to reccommend something to them so the comparison of the different agency plans would be more like comparing apples to apples. Thank you for any help

The Media Guru Answers(Tuesday, July 24, 2001 ):
First we need to distinguish between requesting plans and requesting buy proposals.

A media plan is a document that details what media should be used at what budgets, to accomplich sets of objectives and strategies which meet advertsing objectives set for the planners. If you are soliciting media paln proposals, you should be setting advertising objectives and asking for plans to meet them. Some judgement in addition to quantitative comparison will be appropriate. You could use the relevant portion of the Guru's Parts of a Media Plan as an outline of what is to be included in proposals reveived.

If, however, the media plan is completed and you are taking proposals on media buys, that is what stations, newspapers, magazines, etc fulfil the plan, that the analysis might be simply numerical, as long as all meet the plan's specs, which should be in your rfp.

Beware of comparing reach and frequency analyses that have been created by different software, and are not therefore comparable.

Wednesday, January 17, 2001 #4103
When was the last time the reach & frequency Curve was updated? And what is the significance of that?

The Media Guru Answers(Wednesday, January 17, 2001 ):
Reach, as we use it, is a mathematical calculation, based on average performance of actual schedules similar to the ones for which we are trying to estimate audience accumulation for a plan. A large number of actual schedules are evaluated from survey research such as Nielsen. Because reach is a factor of duplication, as a schedule grow in size, the reach added by each increment is less and less. When reach is graphed against an axis of GRP or insertions or dollars, an asymptotic "curve" like the one below, is drawn. The actual formula which descibes this graphic curve is what is in reach evaluation software. Typically it is a regression of the frequencies vs GRP levels, because frequency, too, is linear.

The Guru imagines you are thinking of TV reach, but could be referring to radio, magazines, or internet, etc. There are different "curves" for any given medium / daypart / demographic / mix situation. If you use Nielsen actual data, the "curves" are -- in effect -- continuously updated. If you use other media software like Telmar or its competitors, you need to ask your representative how recent their update of formulae is. Curves based on reach vs GRP are not very variable over time unless there is a major change in the medium.

For example, Telemundo's Hispanic TV reach system "STRETCH2," was updated in 1998 (by running new Nielsen actual schedules), 5 years after its introduction . There was no significant change in reaches.

But looking at general TV reach curves from the days before cable was significant, versus today's would show big differences.

Monday, August 21, 2000 #3728
What is the formula to equate reach and frequency from an outdoor showing? i.e. a 25 showing has a reach of 76.8% and a frequency of8.2 (I pulled these numbers from your media glossary)

The Media Guru Answers(Monday, August 21, 2000 ):
"25 Showing" in out-of-home media indicates a buy with a daily effective circulation, or traffic count, or impressions, which equate to 25 GRP per day.

In considering a month's reach & frequency, it is common to adjust the weekend days' traffic down by about 50%. In a month, instead of 25 X 30 = 750 GRP, we credit about 630 GRP. This agrees with the arithmetic of 76.8 Reach and 8.2 Frequency.

Monday, August 14, 2000 #3703
Do you know where I can find some published articles about how to determine the media investment base on Optimal reach & frequency level ?

The Media Guru Answers(Friday, August 18, 2000 ):
This is a very basic aspect of media planning. Probably the most common approach to formal media planning is setting a communications goal in reach and frequency terms and then examining the reach delivered by various plan options.

The richest source of articles might be Journal of Advertising Research.

Wednesday, July 26, 2000 #3654
Please provide formula to manually calculate reach & frequency for press. Thanks

The Media Guru Answers(Saturday, July 29, 2000 ):
This calculation is very complicated. If you don't have detailed tables of duplication factors between different publications and between various numbers of multiple issues of the same publication, only fairly crude formulae are available.

Click here to see past Guru responses about reach calculation formulae.

Wednesday, July 19, 2000 #3632
Are there any traditionally accepted reach & frequency benchmarks for TV?

The Media Guru Answers(Sunday, July 23, 2000 ):
The Guru wonders what you really mean.
  • Do you mean "Are there minimum R&F benchmarks when TV is the sole medium of a plan?"
    - Those who follow the effective frequency approach might ask for 50 reach at 3+ frequency
    -Those who favor "recency" might say 'as much continuity as possible with a 30 reach per week minimum'.
  • If you mean "What should be the TV reach level used when TV is the primary medium in a multimedia plan?"
    - Some might point to the reach level where the curve of accumulation 'flattens'.

Monday, July 10, 2000 #3608
hi where can i find researches or information about drugs advertising? which media have the best influence on patients? t.v? press? Radio? which reach & frequency levels are recommended ? thanks

The Media Guru Answers(Monday, July 10, 2000 ):
The answers will vary depending on typical media planning / marketing issues.
  • Who is the target?
  • What is the competitive situation?
  • What are the legal restrictions
For example, in the U.S., there is one set of rules that applies when you are marketing prescription drugs and another set for "over the counter" pharmaceuticals.

For prescription drugs, you can mention a drug name without discussing the problems it treats or its results, or you can mention a problem to treat without mentioning a drug name. In these cases there are fewer rules to observe. When you mention a drug along with its disease or results, you must also provide the "patient information" (PI) which is all the side effects warnings, counterindications, etc. This typically means broadcast advertising must be accompanied by print to carry the PI. Or that print must devote a portion of space to this detailed information.

Monday, June 12, 2000 #3547
I am buying radio in two different markets - one is a large market which is measured by Arbitron. The other is a small market where I get the ratings through Arbitron county measuring. The two cities are only 45 miles apart and there is a large amount of radio overlap. Is there any way to figure an accurate combined reach & frequency? Thanks.

The Media Guru Answers(Monday, June 12, 2000 ):
First, define "market." If these radio markets are both in the same DMA, and you want DMA R&F, add the two stations' reach in thousands and divide by DMA universe. If they are in two different Metros, calculate reach within each and do a weighted average of the two:
  • Metro "A" target population = 100,000
  • Metro "B" target population = 20,000
  • Metro "A" target reach = 40% (40,000)
  • Metro "B" target reach = 55% (11,000)
  • Combined, total coverage area reach = 40,000 + 11,000 100,000 + 20,000, or 42.5%

Tuesday, December 21, 1999 #3067
Is there any standard way of setting reach & frequency benchmarks for the Consumer durable category such as Motorcycles, Television, Tyres etc.

The Media Guru Answers(Tuesday, December 21, 1999 ):
"Consumer durables" is much too broad to generalize. Purchase cycle, seasonality and budget are the key components for setting communications goals.

Target, media choices and geography might also contribute to level setting.

Friday, November 19, 1999 #2989
Media Guru, Our client is asking us why we use reach & frequency to analyze the effectiveness of our media plans. We are not aware of any other tools/methods that have been developed. Can you give us some pointers on how best to answer this question? Thanks in advance!

The Media Guru Answers(Friday, November 19, 1999 ):
Reach and frequency are used to help predict the effect of plans and, more appropriately, to compare the available alternate plans, when communications power is the issue.

Media plans are actually advertising communications plans: "how many people of the targeted demographic receive the message and how often?" is the most basic quantification of the expected acheivements of the plan. In the process of selecting targets amd media, other issues of prospect quality and ad impact are addressed, but the final wieghts and measures are reach, frequency, and their product, gross impressions.

During and after execution, of course, sales and awareness measures are more direct evaluative tools.

Friday, October 01, 1999 #2840
What is the difference between achieving a 10.0 rtg. on one spot of Seinfeld, vs. a combined 10.0 rtg. on Oprah, The Today Show and Just Shoot Me? Are we reaching a larger audience? Is there a way to measure duplication of the three programs? Thanks.

The Media Guru Answers(Friday, October 01, 1999 ):
A combined 10 rating points accumulated across three programs will also represent 10 GRP, or an equal gross audience, but because of duplication the reach will be somewhat less than 10 and frequency somewhat more than 1.0. The reach will be at least equal to the rating of the highest rated program of the three.

The syndicated ratings reports, i.e. Nielsen, measure the duplication; the planner's standard reach & frequency tools estimated the net audience, accounting fo this duplication.

Sunday, May 02, 1999 #2482
What is the minimum weekly threshold level of reach & frequency to be set for a print campaign [ Full page colour] ? How different would be the same for a television campaign [ 30 secs TVC]?

The Media Guru Answers(Monday, May 03, 1999 ):
There is no absolute standard. Recency theory calls for about 30 reach as the weekly threshold. The Guru believes virtually any reach is worth something, but careful analysis of the sales or consumer response needed to support a level of spending can always be done.

To the Guru's thinking, the only reason to have a different threshold for TV vs print is that typically, the frequency levels accompanying a given reach in magazines will be lower than the frequency for the same reach in TV, assuming your reach is at more than a minimum level. (A reach of 10% in either, achieved through one advertisement will have a frequency of 1.0).

Wednesday, March 10, 1999 #2382
RE: My earlier question #2379, my boss responded this way: Pre-launch was a 2-week period, so an average 4-week number would have been a misrepresentation of reality. If you do not have a 4-wk period for comparison than you should not do a 4-week r/f. Do you agree with this? How should I handle this disagreement with my supervisor?

The Media Guru Answers(Wednesday, March 10, 1999 ):
The Guru disagrees. The phrase "average four week" in the context of reach & frequency refers to a rate of accumulation, not really the period of time other than the time periods actually measured in the original establishment of reach calculations. Four weeks was originally chosen as the basis for the actual measurements that built the formulae when monthly media (magazines) were the predominant national advertising media. One does not really care how much time is involved.

For marketing purposes, what is important is that you communicated an advertising message to X% of consumers an average of Y times. It is easy enough to say that "over two weeks, we reached 60% of the target an average of 3.9 times." No one is misled, nothing is invalid. You just happened to use a four week formula to determine the results. As the Guru said earlier. only in some 1-week cases will there be any real differerence. (As there would for long term cumes, like 13 week).

If your supervisor's only alternative is to report nothing, as if there was no way to measure the schedule, that doesn't seem productive.

Wednesday, September 10, 1997 #1411
Dear Guru, I am a Software developer in Brazil and I would like to develop new reach & frequency Software with optimisation. Must I use Simplex method? Is there any other more efficient method? Alexandre Crivelaro,

The Media Guru Answers(Wednesday, September 10, 1997 ):
Most optimization sytems work by adding the "next most efficient quantum of reach." This may be more efficient from a programming perspective, but a system which builds a new plan at each increment of spending can take advantage of the best overall interaction of the media. This will produce more reach-efficient plans.

AMIC's sister company Telmar uses this second type of optimization.

Saturday, February 22, 1997 #1039
I am trying figure out the best way to calculate reach & frequency for the following:

Television Flight:
4 consecutive weeks (250 TRP's per week)
Then scaling back and running 175 TRP's per week - Every other week for the following 8 weeks.

How do you calculate R&F when your schedule runs on an every other week basis?

The Media Guru Answers(Monday, February 24, 1997 ):
There is no basis for believing that an alternate week schedule of 700 total points (175 per week for 4 of 8 weeks) cumes to a different total than 87.5 grp per week for 8 weeks, as long as the scedules are otherwise identical in numbers of different announcements, and numbers of different episodes of the same programs.

It is true that if the schedules per week of activity were solarge as to exhaust reach potentials, the answer might bedifferent, but this is far below such levels

So the total schedule of the first four weeks at 250, plus the 4alternating weeks can be calculated as if there were lower levelconsecutive weeks.

Tuesday, July 23, 1996 #1176
My telecommunications client is planning a multimedia (TV, newspaper, radio) launch in Chicago this fall, hoping the phone will ring off the hook. Is there a way to predict response levels per medium (or in total?) for the client to effectively staff its phone lines? I have total population, target population, reach & frequency levels (for TV - a 6 week flight; for radio a different 6 week flight; print used in both flights). The kicker is: this is not a direct - response spot (of course, an 800# will be included, but generally, it's an image builder). I also know that it will depend greatly on many things creatively (length of time the 800# is on the screen, is it a pnemonic number, is there an offer, etc). I'm thinking if there is an easy answer to this, I wouldn't have a job.

The Media Guru Answers(Wednesday, July 24, 1996 ):
The safe answer is to contract an "inbound telemarketing"service which is large enough to expand or contract around your actual traffic. Depending on the offer and strength of copy, calls could equal .01% to 5.0% or more of persons reached. Using a service the first time out, especially if you're not specifically setting up a DR business, will give you benchmarks for the future.

Friday, March 08, 1996 #1266
Guru:Is there a formula for calculating reach & frequency for trade vehicles.

The Media Guru Answers(Sunday, March 10, 1996 ):
There is no truly simple formula for calculating reach and frequency of any medium. The key datain print R&F are pair-wise duplication between different vehicles and between two or more insertions in the same vehicle.

As the number of insertions in a plan increase, the number of data elements to include in a formula increase. The number of possible pairings for just a 10 insertion plan is 45 ((n x n-1) / 2).

Telmar among others, offers software designed to quickly perform these calculations on defined schedules of media measured by SMRB, MRI, MMR, J.D. Power or others. Using measured media as prototypes, reach of various schedules you might want to consider could then be calculated. From these numerous calculations, you could, by regression analysis, develop a "simple" formula of the form y=ax+b to calculate frequency based on GRP of typical plans of the sort you run in these media (y is frequency; x is grp; a and b are factors from the regression).

A formula of this kind is very specific to the audience dynamics of the media vehicles involved. Please understand, this is not a recommended technique, merely a response to your question.

Wednesday, January 10, 1996 #1792
Please provide some sources for a small ad agency to use to conduct national magazine print planning for a demanding client. I have several programs with very different audiences and don't have the time or staff necessary.

The Media Guru Answers(Friday, February 02, 1996 ):
"Programs" shouldn't be providing audience data, they should be reading the current data of SMRB, MRI, MMR, etc.

Telmar has software which will analyze media plans using any of these or several other audience studies. SMRB and MRI also offer systems to analyze their audience data in media planning.

If your concern is primarily software cost or staff time, the print media also have these systems and are eager to help you run reach & frequency or other analyses of print alternatives. It would be wise to specify the data (SMRB or MRI, etc) which you will use as your standard and ask more than one of the candidate publications to do analyses.

Magazine audience change over time, new magazines come along; it is important to be using current research.