Which of the following is a visual method for evaluating a product?

Visual checking is a method that focuses on examining a product's appearance, functionality, and overall quality through visual observation. This approach allows evaluators to assess elements such as design aesthetics, material quality, surface finish, and any visible defects or inconsistencies. It provides a quick and effective way to gather information about a product without needing hands-on interaction.

In contrast, trialling involves using the product in actual conditions to test its performance, while group discussions typically revolve around gathering feedback from multiple stakeholders, often focusing on the subjective views rather than visual aspects. Comparing specifications relates to reviewing numerical or technical data about a product, which does not inherently involve visual assessment. Therefore, visual checking stands out as the method primarily oriented towards evaluating a product based on visual criteria.