The flow of customer traffic must be anticipated and planned. One layout plan is block-like, similar to supermarkets and hardware stores. It provides more merchandise exposure and simplifies security and cleaning. A free-flowing pattern makes less efficient use of space but has greater visual appeal and allows customers to move in any direction at their own speed. It results in curving aisles and greater flexibility in merchandise presentation.
Many retailers use a self-service layout which permits customers direct access to the merchandise.
Not only does self-service reduce the selling expense, but it also permits shoppers to examine the goods before buying. Some types of merchandise are purchased on an impulse basis. Impulse goods should be placed at points where customers can see them easily. Products which customers will buy anyway and are their primary reasons for coming in may be placed in less conspicuous spots. The areas of a retail store differ greatly in sales volume.