The valuation of inventory requires us to estimate obsolete or excess inventory as well as inventory that is not of saleable quality. The determination of obsolete or excess inventory requires us to estimate the future demand for our products. The demand forecast is included in the development of our short-term manufacturing plans to enable consistency between inventory valuation and build decisions. Product-specific facts and circumstances reviewed in the inventory valuation process include a review of the customer base, the stage of the product life cycle of our products, consumer confidence, and customer acceptance of our products, as well as an assessment of the selling price in relation to the product cost. If our demand forecast for specific products is greater than actual demand and we fail to reduce manufacturing output accordingly, or if we fail to forecast the demand accurately, we could be required to write off inventory, which would negatively impact our gross margin.