We recognize revenue when it is realized or realizable and earned. We consider revenue realized or realizable and earned when there is persuasive evidence of an arrangement, delivery has occurred,
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the sales price is fixed or determinable, and collectability is reasonably assured. Delivery does not occur until products have been shipped or services have been provided, risk of loss has transferred and in cases where formal acceptance is required, customer acceptance has been obtained or customer acceptance provisions have lapsed. In situations where a formal acceptance is required but the acceptance only relates to whether the product meets its published specifications, revenue is recognized upon shipment provided all other revenue recognition criteria are met. The sales price is not considered to be fixed or determinable until all contingencies related to the sale have been resolved. We reduce revenue for rebates and other similar allowances. Revenue is recognized only if these estimates can be reliably determined. Our estimates are based on historical results taking into consideration the type of customer, the type of transaction and the specifics of each arrangement. In addition to the aforementioned general policies, the following are the specific revenue recognition policies for multiple-element arrangements and for each major category of revenue.
October 2009, the FASB issued authoritative guidance that applies to arrangements with multiple deliverables. The guidance eliminates the residual method of revenue recognition, on non-software arrangements, and allows the use of management's best estimate of selling price ("BESP") for individual elements of an arrangement when vendor-specific objective evidence ("VSOE") or third-party evidence ("TPE") is unavailable. In addition, the FASB issued authoritative guidance which removes non-software components of tangible products and certain software components of tangible products from the scope of existing software revenue guidance, resulting in the recognition of revenue similar to that for other tangible products. We adopted these standards at the beginning of our first quarter of fiscal 2011 on a prospective basis for applicable transactions originating or materially modified on or after July 3, 2010. When a sales arrangement contains multiple deliverables, such as sales of products that include services, the multiple deliverables are evaluated to determine whether there are one or more units of accounting. Where there is more than one unit of accounting, then the entire fee from the arrangement is allocated to each unit of accounting based on the relative selling price. Under this approach, the selling price of a unit of accounting is determined by using a selling price hierarchy which requires the use of VSOE of fair value if available, TPE if VSOE is not available, or BESP if neither VSOE nor TPE is available. Revenue is recognized when the revenue recognition criteria for each unit of accounting are met. We establish VSOE of selling price using the price charged for a deliverable when sold separately and, in remote circumstances, using the price established by management having the relevant authority. TPE of selling price is established by evaluating similar and interchangeable competitor goods or services in sales to similarly situated customers. When VSOE or TPE are not available then we use BESP. Generally, we are not able to determine TPE because our product strategy differs from that of others in our markets, and the extent of customization varies among comparable products or services from our peers. We establish BESP using historical selling price trends and considering multiple factors including, but not limited to geographies, market conditions, competitive landscape, internal costs, gross margin objectives, and pricing practices. When determining BESP, we apply significant judgment in establishing pricing strategies and evaluating market conditions and product lifecycles.