Management uses both GAAP and non-GAAP financial measures to analyze and assess the overall performance of the business, to make operating decisions and to forecast and plan for future periods. We believe that our investors benefit from seeing our results “through the eyes of management” in addition to seeing our GAAP results. This information enhances investors’ understanding of the continuing performance of our business and facilitates comparison of performance to our historical and future periods.

Our non-GAAP financial measures may not be comparable to similarly titled measures used by other companies, including industry peer companies, limiting the usefulness of these measures for comparative purposes.

These non-GAAP measures should be considered supplemental to and not a substitute for financial information prepared in accordance with GAAP. The discussion below presents information about each of the non-GAAP financial measures and the company’s reasons for including or excluding certain categories of income or expenses from our non-GAAP results. In future periods, we may exclude such items and may incur income and expenses similar to these excluded items. Accordingly, adjustments for these items and other similar items in our non-GAAP presentation should not be interpreted as implying that these items are non-recurring, infrequent or unusual.

Non-GAAP Revenue includes recognition of acquired deferred revenue that was written down to fair value in purchase accounting. Management believes that excluding fair value purchase accounting adjustments more closely correlates with the ordinary and ongoing course of the acquired company’s operations and facilitates analysis of revenue growth and business trends.

Non-GAAP Core Revenue is non-GAAP revenue (see Non-GAAP Revenue above) excluding the impact of foreign currency changes and revenue associated with businesses acquired within the last twelve months. We exclude the impact of foreign currency changes as currency rates can fluctuate based on factors that are not within our control and can obscure revenue growth trends. As the nature, size and number of acquisitions can vary significantly from period to period and as compared to our peers, we exclude revenue associated with recently acquired businesses to facilitate comparisons of revenue growth and analysis of underlying business trends.

Non-GAAP Income from Operations, Non-GAAP Net Income and Non-GAAP Diluted EPS may include the following types of adjustments:

• Share-based Compensation Expense: We exclude share-based compensation expense from our non-GAAP financial measures because share-based compensation expense can vary significantly from period to period based on the company’s share price, as well as the timing, size and nature of equity awards granted. Management believes the exclusion of this expense facilitates the ability of investors to compare the company’s operating results with those of other companies, many of which also exclude share-based compensation expense in determining their non-GAAP financial measures.
• Acquisition-related Items: We exclude the impact of certain items recorded in connection with business combinations from our non-GAAP financial measures that are either non-cash or not normal, recurring operating expenses due to their nature, variability of amounts and lack of predictability as to occurrence or timing. These amounts may include non-cash items such as the amortization of acquired intangible assets and amortization of items associated with fair value purchase accounting adjustments, including recognition of acquired deferred revenue (see Non-GAAP Revenue above). We also exclude transaction and certain other cash costs associated with business acquisitions that are not normal recurring operating expenses, including amortization of amounts paid to redeem acquires’ unvested stock-based compensation awards, and legal, accounting and due diligence costs. We exclude these charges to facilitate a more meaningful evaluation of our current operating performance and comparisons to our past operating performance.
• Separation and Related Costs: We exclude all incremental expenses incurred to effect the separation of Keysight from Agilent. We exclude expenses that would not have been incurred if we had no plan to spin-off including, among other things, branding, legal, accounting and advisory fees, costs to resize and optimize our infrastructure and other costs to separate and transition from Agilent. We believe that these costs do not reflect expected future operating expenses and do not contribute to a meaningful evaluation of the company’s current operating performance or comparisons to our operating performance in other periods.
• Restructuring and Related Costs: We exclude incremental expenses associated with restructuring initiatives, usually aimed at material changes in the business or cost structure. Such costs may include employee separation costs, asset impairments, facility-related costs, contract termination fees, and costs to move operations from one location to another. These activities can vary significantly from period to period based on the timing, size and nature of restructuring plans; therefore, we do not consider such costs to be normal, recurring operating expenses. We believe that these costs do not reflect expected future operating expenses and do not contribute to a meaningful evaluation of the company’s current operating performance or comparisons to our operating performance in other periods.
• Northern California wildfire-related costs and Other Items: We exclude certain other significant income or expense items that may occur occasionally and are not normal, recurring, cash operating from our non-GAAP financial measures. Such items are evaluated on an individual basis based on both quantitative and qualitative factors and generally represent items that we would not anticipate occurring as part of our normal business on a regular basis. While not all-inclusive, examples of certain other significant items excluded from non-GAAP financial measures would be: costs related to unusual disaster like Northern California wildfires, significant realized gains or losses associated with our employee benefit plans, significant litigation-related loss contingency accruals and settlement fees or gains associated with other disputed matters.
• Estimated Tax Rate: We utilize a consistent methodology for long-term projected non-GAAP tax rate. When projecting this long-term rate, we exclude any tax benefits or expenses that are not directly related to ongoing operations and which are either isolated or cannot be expected to occur again with any regularity or predictability. Additionally, we evaluate our current long-term projections, current tax structure and other factors, such as existing tax positions in various jurisdictions and key tax holidays in major jurisdictions where Keysight operates. This tax rate could change in the future for a variety of reasons, including but not limited to significant changes in geographic earnings mix including acquisition activity, or fundamental tax law changes in major jurisdictions where Keysight operates. The above reasons also limit our ability to reasonably estimate the future GAAP tax rate and provide a reconciliation of the expected non-GAAP earnings per share for the second quarter and the first half of fiscal 2018 to the GAAP equivalent.