In user trials a product is tested by “real users” trying out the product in a controlled or experimental setting, where they are given a set of tasks to perform.

The result can be a “problem list” which contains valuable information for designers regarding the potential for improving the usability of a product.

User trials are normally applied when a prototype product is running, or when a complete product is to be evaluated. Low-tech mock-ups and prototypes may also be used.

They are often used before a final product design has been agreed, and are commonly used on pre - production prototypes .

They are often used as a simpler way of evaluating products compared to more extensive field trials, which commonly take place when a more completed product is to be evaluated prior to market release.

Besides the product to be tested, an area where testing can take place.

The testing process may take several weeks, or even months depending on the number of testing sessions.

Costs of this will vary with the number of tests, how complex the test are and how they are evaluated.

User trials try and identify a set of tasks that users would perform when using the product. These can include commonly occurring tasks, but can also include tasks which would be difficult to observe in other settings.

For example, in a user trial it is possible to simulate dangerous events which might not be observed in any other forms of investigation e.g. Crash testing a car.

Advanced testersAdvanced testing is performed in labs, by professionals with specialised equipment.

Actual users or Potential usersEnd users (consumers) of the product are used in trials like this.

Step 1: PlanningAt this stage the aims of the User Trial are decided.

Step 2: Test materialTasks are selected which will be performed frequently by a user.

Step 3: The trialUnder guidance, the testers perform the User Trial.

Step 4: Data analysisThe results of the tests are analysed.

Step 5: ImplicationsThe results are passed on to designers, developers to focus on thepossibilities for improvement in the design of the product.

AestheticsThe overall appearance of a product.

ErgonomicsHow the product feels and handles.

FunctionThe job it is supposed to do.

PerformanceHow well the product performs its function/s.

SafetyHow safe it is to use.

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