A participant reaches the end of a booking prototype and asks whether the appointment has actually been confirmed. The team could record a failed task and move on, or investigate what led to the uncertainty while the design is still open to change. Formative research takes the second question seriously.
Formative research informs the development or improvement of a product, service or intervention. Its purpose is to shape what happens next, whether by understanding needs, investigating a concept or finding difficulties in an existing design.
Distinguish the purpose from the timing
Formative work often happens during development, but a live product can also be studied formatively when the aim is to improve it. Summative evaluation assesses performance or outcomes against a question or criterion, often at a milestone. Nielsen Norman Group’s comparison of formative and summative evaluation explains the distinction.
Neither label fixes the method. A formative study can use quantitative evidence to identify a problem, and a summative assessment can include qualitative material. What matters is whether the study design provides the evidence its purpose requires.
In the fictional booking example, a small moderated study may help explain why confirmation is unclear. Estimating the proportion of all customers affected would require a different sampling and measurement plan.
Investigate the difficulty before choosing the fix
Ask participants to work through realistic task scenarios, and observe the sequence around the problem. Their uncertainty may come from the final message, an earlier payment step or an expectation that confirmation should arrive by email.
Use follow-up questions without supplying the explanation. “What do you think has happened?” allows the participant to describe their interpretation, whereas “Was the confirmation too subtle?” directs attention towards the team’s first theory.
Match prototype fidelity to the question. A rough representation may be sufficient for the sequence of steps, but a question about feedback or timing may require working interactions.
Leave time for another decision
Discuss findings while the team can still act on them, preserving the difference between observed problems and proposed solutions. Prioritise using consequence, evidence and practical constraints rather than the number of comments alone.
When the design changes, evaluate whether it resolves the underlying difficulty and whether it introduces another one. A clearer final message may help, but it will not repair an earlier step that led people to believe the booking had already completed.
Formative research is useful because it connects learning to revision. Its success is not measured by how many issues appear in a report, but by whether the team can use the evidence to make and assess a better design decision.