First define the subject of comparison
The word ‘design’ may refer to a product's appearance, an individual pattern, packaging or a digital mock-up. Examination starts by selecting specific objects and a question: whether matching elements need to be described, styling variants compared or a product's appearance studied against industrial design images. These tasks use overlapping observations but do not yield interchangeable conclusions. A single similarity table does not answer every question at once.
For each object, record its source and version: a physical specimen, catalogue, photograph, drawing or mock-up file. Distinguish an image's publication date from the product's creation date. If different modifications are provided, consider them separately. Otherwise, a comparison may combine one variant's housing, another's decoration and a third's packaging even though that combination never existed as a single examined object.
Move from overall appearance to features
Visual analysis describes silhouette, relationships between main volumes, proportions of parts, element placement, lines, ornament, colour combinations and visible texture. It is useful to show the whole object first and then identify details to be checked. This sequence explains how an individual correspondence relates to the composition, rather than replacing holistic comparison with a list of convenient fragments. A detail's size and position may also matter.
A comparison table must contain more than ‘matches’ and ‘differs’. For each feature, state where it is observed, which images support it and how confidently it can be assessed. The same outline may accompany a different surface organisation; similar ornament may have a different position on the product. The significance of these combinations must be explained for the specified object rather than mechanically counting matching rows.
Check image comparability separately
Different viewpoints can make one shape appear to have different proportions. Wide-angle photography, perspective, shadows and reflections alter visible geometry. The researcher therefore seeks corresponding views, notes scale and does not declare an invisible part absent. If the original is available, inspection helps clarify disputed areas. If it is not, the limitation must accompany the particular conclusion that depends on the inaccessible surface.
Colour and texture are especially difficult to compare using arbitrary screenshots. Lighting, image processing and colour reproduction settings may explain an observed difference. Working image normalisation is described and originals retained. A photograph must not be silently stretched, part of a composition deleted or a surface recoloured and the resulting montage presented as direct evidence that products match. Image overlays serve as illustrations when their preparation conditions are known.
Consider purpose and the comparative background
Products with the same purpose may repeat convenient functional shapes, standard connections and familiar control locations. This is a reason to check the origin of similarity, not to exclude such features from the description in advance. The researcher distinguishes an observed external element, its assumed function and a documented technical constraint. The explanation ‘all products are made this way’ itself needs verifiable grounds and suitable comparative material.
Catalogues and earlier images help establish which solutions occur in the relevant product group. Each example requires a source, date and comparable view. A random collection of similar products from search results does not establish that a feature is typical. If the analysis concerns an industrial design, the images used and the task posed are identified separately: general visual resemblance does not replace examining a particular object within the required boundaries.
Link the conclusion to observations
A convincing result shows which similarities and differences were established, how they combine and which questions remain open. A similarity percentage without defined features, rules for identifying them and justification of their significance provides little information. Checking alternative explanations is equally important: a common source template, a widespread solution or a documented version change may affect interpretation of identical observations differently. A single impressive outline overlay is insufficient.
For an enquiry, it is useful to provide an object inventory, original images, available views and a precise question about the designs being compared. The specialist examination allows discussion of established features and sufficiency of materials. In litigation, the court decides infringement of exclusive rights and its consequences. A scientifically justified comparison helps consider the factual issues while maintaining the distinction between observed similarity and legal assessment.