Methods and learning

Product design: responsibilities and practical exercise

Link user problem, design and feedback on a feature.

These sheets describe activities and teaching exercises. They do not constitute job offers, certifying courses or recruitment promises.

All job descriptions
Illustration of design and review work on a computer
Illustration

Missions and responsibilities

Connect user needs, service objectives and a verifiable solution across the whole journey, beyond individual screen appearance.

Typical activities

  • Define the problem and constraints before proposing variants.
  • Prototype steps and states affecting decisions.
  • Test proposals against user needs and technical feasibility.

Responsibilities to agree with the team

Designers document trade-offs; product owners decide scope and priorities. Attractive proposals still require feasibility, maintenance and testing.

A first piece of work to demonstrate

Compare two journeys using observed tasks and explain the chosen option.

This is an editorial description of common activities. Job titles and scope vary across teams; it is not a certification framework.

W3C: organising accessibility responsibilities across a team

An exercise to practice

Improve search for a catalog by examining requests and searches without result.

Work on a copy or demo environment. Define the data used and the expected result before you begin. Keep your decisions and the difficulties encountered in order to be able to explain the process.

  1. Formulate the problem and the expected decision before choosing a function.
  2. Study several variants with the same tasks and constraints.
  3. Define the necessary returns to evaluate the use after delivery.
  4. Document what is retained, deferred and still uncertain.

Deliverable and verifications

A framed problem, reasoned variants, a prototype and a verification plan.

The choices are justified and the limits of the verification are explicit.

For each check, note the context, the action, the expected result and what has been observed. Distinguish a successful verification from a remaining hypothesis. Another person must be able to understand the deliverable without attending all its manufacture.

Use the Functional Validation Book

Points of vigilance and teamwork

Adding a feature does not guarantee improvement. A decision must remain related to the initial problem and the available observations.

Collaboration to explore: UX research.

Specify the sharing of responsibilities: who provides the information, who decides, who checks and maintains the result. A good handover retains the constraints and decisions, not just the final file.

Employment, trades and training

Assess the quality of the work

Assess a product decision through the problem addressed, chosen scenario and evidence that could invalidate the solution. A prototype helps learning; visual success does not yet establish product usefulness.

Assess the quality of the work
SkillEvidence to examineFailure to spot
ProblemAn audience, observable difficulty and decision to make.The desired feature is used as the definition of the need.
HypothesisA testable scenario with success and failure conditions.The test cannot challenge the solution.
Trade-offCompromises, constraints and remaining questions are recorded.One result is presented as universal validation.

Download the editable CSV checklist

The file contains this table and blank columns for the observed result, owner and follow-up. It opens in a spreadsheet; downloading it does not send your observations to the site.

A focused next step

Compare two responses to the same need, including a simpler option. Before testing, define what observation would change the choice, then record what was learned rather than only the selected screen.

W3C WAI: involving users in evaluation.

Learning scenario

Extended exercise and expected deliverables

In-depth exercise: Improve a research path where visitors do not know how to differentiate categories. Formulate the problem before choosing an interface. Propose two tracks: clarify categories or modify filtering. For each, describe the people concerned, the dependencies and how to check the effect. Make a prototype limited to the useful course. A decision must be able to be explained by a need and an observation, without transforming a personal preference into a demonstrated result.

What to deliver with your work

  • Description of the problem and context of use
  • Assumptions and Comparative Solutions
  • Priority course prototype
  • Journal of Decisions and Validation Conditions

Acceptance criteria

These criteria are a working basis to adapt to the context. For each, note the action taken, the expected result, the observed result and the information remaining to be confirmed.

  1. The solution responds to a problem formulated before design.
  2. Unverified hypotheses are identified.
  3. The prototype allows you to perform the main task until its result.
  4. The final decision indicates the evidence used and its limits.

Record results in the acceptance test log

Ongoing management and handover

Share selected choices, discarded tracks and open questions with the production team. Link acceptance criteria to uses rather than just screenshots. Specify how a new data can put a decision under discussion. After delivery, compare the observed behavior to the starting hypothesis; The publication of the prototype does not constitute a validation of its usefulness.

Organize site maintenance

Compare two approaches

Design may address an observed difficulty or explore a new capability. Separate these goals so that an expected correction is not compared with an untested hypothesis.

Improvement of an existing workflow

When to choose it
Suitable for a problem supported by usable observations. Define the affected users and the action that has become difficult.
What to plan for
Keep a baseline and identify possible side effects. A local improvement can move a difficulty elsewhere.

Exploration of a new solution

When to choose it
Useful when the need is plausible but the response uncertain. State hypotheses and choose a prototype that supports discussion.
What to plan for
Define what the trial can teach you. Positive intentions are not evidence of sustained use or profitability.

A risk to anticipate

A feature list does not explain a workflow’s value. Link each proposal to a task, constraint and expected outcome.

How to decide

Present alternatives and available information. Explain what justifies the trial, what remains unknown and what would prompt reconsideration.

Explore this decision further

Frequently asked questions

Does this exercise prove a professional qualification?

It allows you to show an approach and its limits. It is neither a diploma, nor a certification, nor proof of a production experience.

How to present the work in a portfolio?

Specify that this is an exercise, your role, constraints, decisions and checks. Use test data and media whose rights are established.

How to assess the quality of the deliverable?

The choices are justified and the limits of the verification are explicit. Add the difficulties encountered and what remains to be verified rather than presenting absolute validation.

How should a solution never used in production be presented?

Identify it as a prototype or exploration. Describe hypotheses, people consulted and tasks observed. Separate observed results from expected effects: the document supports a decision without promising unmeasured outcomes.

resources to deepen

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