Some components are required for the basic product. These items are neither an option nor an accessory.

While there may be several ways to add such components, they are typically defined as standard components using Product Structure Maintenance. Set the Reference field to a value such as Base or Required.

The Structure Code for standard components remains blank, allowing the cost of the components to be rolled up to the top-level product. Components of a configurable product that are added as regular component items are automatically set up as mandatory and default items.