The manufacturing processes used to transform the design to a tangible product determine if the inherent design maintainability of the product is achieved. It is essential that the designed maintainability not be compromised by manufacturing requirements, so manufacturing engineers and planners must be involved in the design effort. Without their involvement, maintainability design features or approaches may make the product difficult or too expensive to manufacture. For example, access panels that were included to ensure maintainability requirements are met might be placed in an area where the moldline of the product has compound curves. Moving the panel to an area that is flat or has a simpler surface might still allow good access and improve manufacturability.