Concept Testing Brief: A Supplier Template and Example

A concept testing brief tells a researcher which product decision you need to make, which offers buyers will see and what the report must resolve. It gives suppliers a common job to quote while leaving room for them to improve the study design. If one proposal tests an attractive description and another tests a complete priced offer, their fees buy different answers.

Consider a refill retailer deciding whether to add home delivery. The team needs to know whether a defined delivery offer deserves a limited operational pilot. A general question about enthusiasm for convenient shopping won't tell it whether shoppers understand the fee, the collection arrangement or the alternative of collecting refills themselves.

The brief should carry that decision all the way into the requested output. The questionnaire, stimulus card and supplier proposal each do a different job: the brief sets the problem, the card shows the offer, and the proposal explains how the researcher will answer it.

The decision comes before the questionnaire

Write the action the study could change. “Learn about our customers” leaves almost every design choice open. “Choose whether to develop home delivery, revise its terms or retain collection only” gives the researcher a decision to work toward.

Include the date of that decision and why it matters. If delivery capacity must be reserved before the readout, say so. If a physical handling trial follows concept selection, separate the two stages so a favorable concept response doesn't become permission to launch an untested service.

The FAO's marketing research guidance distinguishes the research brief from the proposal and asks the buyer to make the purpose, objectives, timing and resources clear. That distinction is useful when you want a supplier's advice rather than a quote for a questionnaire you've already locked.

Give the researcher the existing evidence, too. A complaint about carrying refill bottles is useful context; it doesn't prove that the complainant will pay for delivery. Keep the original source and date beside the claim, and identify what the proposed study still has to answer.

A worked brief for the refill decision

This illustrative brief concerns a retailer offering the same two one-liter detergent refills through collection or delivery. The US dollar amounts and operating terms are example inputs, with no study results attached.

Decision and boundaries

The owner is the retailer's product lead. The decision is whether the delivery concept should move into a small operational pilot, needs revision, or should be set aside while collection continues. The concept study will assess understanding, relevance and stated choice. Delivery reliability, safe handling and actual paid repeat use belong to the later pilot.

The product lead supplies a readout deadline tied to the capacity decision. The operations lead confirms which service promises are feasible before any concept reaches respondents. The study should not present delivery windows or collection arrangements that the business can't offer.

Buyers and alternatives

Eligible buyers are adults in the proposed service area who bought household detergent refills in the past three months and take part in choosing where to buy them. Identify current customers and other refill buyers separately. Exclude people outside the delivery area and record how eligibility is checked.

The alternatives are complete offers:

For this brief, the minimum order is one two-refill bundle and no bottle deposit applies. Collection is available Monday through Saturday, 9 a.m. to 6 p.m. Delivery must be booked by 6 p.m. Thursday for Saturday arrival; times are local. Either purchase is a one-time order. Buyers can return empty retailer bottles at the shop or hand them over at their next booked delivery.

Those terms belong on the cards. A respondent shouldn't have to invent the deposit, booking deadline or obligation to reorder. Keep the product, quantity and descriptive detail consistent across cards.

This compares the two commercial offers. Delivery and price change together, so a preference difference won't isolate the value of delivery from the effect of its fee. If that separate estimate is needed, ask the supplier for a design that can answer it and a separate price for that work.

Questions and evidence

Before explaining the service, ask buyers to describe what they would receive, what they would pay and what happens to the empty bottles. Then examine how each offer fits their shopping routine, what prevents consideration and which alternative they would choose, including continuing with their current arrangement.

Ask the supplier to recommend independent exposure, repeated exposure or a choice task based on the decision. Our concept testing methods guide explains what those designs let you compare. The brief can specify the question without pretending the buyer has already selected the right design.

If the retailer needs a separate statement to show respondents, our product concept statement template covers the offer card. Keep supplier instructions off that card.

The report needs an agreed shape

Request one row per offer, buyer group, question and answer option. The columns should identify the offer version, buyer group, exact question, answer label, response source, valid answering base, count, percentage and missing responses. If an answer can receive several interpretation codes, explain that the coded percentages can overlap.

Keep the full response distribution alongside any summary score. A report that combines current customers with other refill buyers can conceal the group for whom collection already works well. An overall preference number can't explain whether the delivery fee is unclear or simply unattractive.

Ask for supporting open answers linked to the offer and group, a list of recurring misunderstandings, and a recommendation that names the next change. “Improve the concept” isn't enough. “Show the $22 order total beside the delivery description, then recheck what buyers think they will pay” gives the team something to revise.

Human responses and simulated responses need separate labels and bases. If a provider proposes a modeled audience, ask what evidence supports this audience and task. The number of generated answers isn't a human sample-size calculation. Our concept testing sample-size guide develops the planning question for the comparisons you intend to read.

A copyable concept testing brief

Replace the bracketed fields before sending the same brief to shortlisted suppliers.

• Decision: [Choose, revise or stop which offer? What would each outcome change?]
• Owner and deadline: [Who decides, on what date, and what commitment follows?]
• Buyers: [Market, eligibility, purchase context, exclusions and groups to report separately.]
• Offers: [Complete cards, quantities, prices, terms, versions and the current alternative.]
• Main question: [The uncertainty that prevents the decision today.]
• Other evidence: [Existing sources, dates, coverage and permitted use.]
• Design advice requested: [Which exposure, recruitment or modeling choices should the supplier recommend?]
• Output: [Rows, columns, units, answering bases, response access and readout format.]
• Decision rules: [Acceptable misunderstanding, minimum worthwhile difference and how uncertainty affects the call.]
• Further checks: [What needs a physical, behavioral or operational test before commitment?]
• Work and quote: [Responsibilities, revisions, full fee, dependencies, delivery dates and access period.]

Agree the decision rules before seeing the answers. The supplier can advise on measurement and uncertainty; the business still has to decide what risk or improvement justifies the next commitment. Don't let an attractive score become the rule after the fact.

Comparable proposals make the purchase clearer

Have each supplier mark what's included, excluded or separately priced. Confirm who supplies the audience, checks the materials, writes the questions, interprets responses and attends the readout. Ask what happens when the first findings reveal a wording problem that needs a revised card.

Sapien can help shape a concept comparison around data-grounded simulated buyers and return interpretations, group differences and a recommendation. For the refill retailer, that could clarify reactions to the complete collection and delivery offers before the operational pilot. The pilot would still need actual deliveries, payments and repeat orders. If simulation is the proposed route, our synthetic research brief adds the source and validation questions specific to that purchase.

A brief is ready when the researcher can explain the decision, show the complete alternatives and describe a report the product lead can use. For the refill team, the deliverable should make a delivery offer easier to revise or test, with the next commitment clearly bounded.