This excerpt taken from the ROK 10-K filed Nov 19, 2007.
We rely on third party suppliers, which creates certain risks and uncertainties.
Our manufacturing processes require that we buy a high volume of equipment, components and materials from third party suppliers. Our reliance on these suppliers involves certain risks, including:
Any of these uncertainties could adversely affect our profitability and ability to compete. We also maintain several single-source supplier relationships, because either alternative sources are not available or the relationship is advantageous due to performance, quality, support, delivery, capacity, or price considerations. Unavailability or delivery delays of single-source components or products could adversely affect our ability to ship the related product in desired quantities and in a timely manner. The effect of unavailability or delivery delays would be more severe if associated with our higher volume and more profitable products. Even where alternative sources of supply are available, qualifying the alternate suppliers and establishing reliable supplies could cost more or could result in delays and a loss of revenues.