Popularity does not maximize reach
TURF finds the combination that reaches the most people — with the fewest items.
FROM SETUP TO FIELDWORK
List the options once. See the exact selection screen respondents get.
No separate preview step — every option you add appears as its own checkbox on the right.
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Options
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Left: the full option list every TURF study starts from. Right: exactly what respondents see — one multi-select question, checked as you go.
FROM RESPONSES TO RESULTS
Maximum reach with fewer options
Every figure below comes from one real example study — 600 respondents picking everything that appeals from 10 items, computed by the same engine your own survey runs on.
Survey design
The survey method, the number of items, the search algorithm and the headline reach figures.
Reach of each option
The share each item reaches on its own — the starting point every bundle builds from.
10 items in total. Share who said each one appeals, taken on its own.
Diminishing returns
Compare cumulative reach with the gain from each added option to identify where the incremental benefit begins to level off.
The marginal line drops under 5%p from the fourth item on — that is where adding stops paying.
Maximum-reach combination
For each combination size, the analysis selects the options that add the most new reach and highlights the recommended set.
Overlapping customer reach
The duplication matrix shows which options are frequently selected by the same respondents, helping you avoid redundant combinations.
Pairs chosen together most often. High overlap is wasteful in a bundle but makes a good package.
Recommended actions
The report summarizes practical implications supported by the analysis results.
A COMPLETE REPORT
See the full report from summary to conclusion.
The six cards above are fragments of this. Scroll the real output end to end, right here on the page.
IN THE REPORT
Maximum reach with fewer options
Compare individual reach, overlap, and incremental gain to find the smallest combination that covers the widest audience.
Cumulative reach curve
See total unduplicated reach climb as items are added.
Diminishing-returns point
Flags where each added item stops adding meaningful reach.
Best combination per size
The highest-reach set for every portfolio size, 1..n.
Exhaustive combination search
Evaluates all combinations, not just the top sellers.
Combination detail table
Members and reach % for each combination, best highlighted.
Marginal reach per item
Net new customers each item brings to the portfolio.
Low-contribution flags
Identify redundant items that only duplicate reach.
Pairwise duplication
Share of respondents who like both items in a pair.
Overlap & cannibalization view
Spot near-substitutes so you keep only the best pair member.
AI auto-interpretation
Plain-language reading of the optimal mix and its lift.
Make every item increase reach
See how much reach each item adds, where overlap begins, and when adding one more option stops being worthwhile.