(1)

Manufacturing profit in acquired inventory results from purchase accounting entries to increase the value of inventory acquired to its fair value. As the acquired inventory is sold, the associated manufacturing profit in acquired inventory increases cost of goods sold and reduces gross profit. Management believes it is useful to exclude manufacturing profit in acquired inventory as it does not reflect continuing operations of acquired entities and to facilitate comparability of gross profit between periods. In addition, management excludes the impact of manufacturing profit in acquired inventory in internal measurements of gross profit.

In Microsemi's effort to streamline our product lines and strategic focus, as well as integrate product lines from acquisitions, we have periodically exited or deemphasized several areas which has improved operating expense from various cost reductions. We periodically evaluate the profitability of our various offerings. Should the actual or expected profitability fall below an acceptable threshold, we may decide to stop offering a product, in part to reallocate manufacturing, operations, engineering, sales and support resources to products we expect to generate greater returns. We believe that for many of these products, market dynamics dictate that price is the primary differentiator rather than our value-added core competencies of power, reliability, security and performance.

Restructuring, severance, facilities and other special charges consist of severance and other costs related to the consolidation of operations, strategic discontinuation of products and closure of facilities.

Related to the streamlining of our operations, we have recorded both charges and gains related to facility consolidation and equipment on both leased and owned properties and engineering equipment for development projects we are no longer pursuing. Facilities consisted of manufacturing sites, as well as sales, engineering and administrative space.

As the operations and products referred to above are not expected to have a continuing contribution to operations or they are expected to have a diminishing contribution during the transition phase, management believes excluding such items from Microsemi's operations is useful to investors as it provides a means of evaluating Microsemi's on-going operations. Management believes that utilizing non-GAAP financial measures that exclude these items is useful in providing an alternate measure to evaluate core operating activities and management excludes these items in its evaluation of operations and for strategic decision making, forecasting future results and evaluating current performance.

(2)

Amortization of acquisition related intangible assets is excluded from internal analysis of Microsemi's operations and management does not view this non-cash expense as reflective of the business' current performance. Management believes that utilizing non-GAAP financial measures that exclude this non-cash item is useful in providing an alternate measure that excludes the variability caused by purchase accounting factors.

(3)

Stock based compensation is excluded by management when evaluating operating activities and for strategic decision making, forecasting future results and evaluating current performance. Management believes that utilizing non-GAAP financial measures that exclude this non-cash item is useful in providing an alternate measure that excludes the variability caused by different methodologies and subjective assumptions used in the valuation of equity awards across different companies.

(4)

In accordance with business combination and other relevant accounting guidance, we expense acquisition and divestiture costs as incurred and recognize gains on divestitures upon consummation of the transaction. During the first quarter of 2017, we reduced the $125.5 million gain recognized from our third quarter 2016 divestitures by $1.2 million. Management excludes these expenses and gains when evaluating operating activities and for strategic decision making, forecasting future results and evaluating current performance. Management believes that utilizing non-GAAP financial measures that exclude this item is useful in providing an alternate measure that excludes the variability caused by purchase accounting factors.

(5)

Credit facility issuance and debt extinguishment costs have been excluded as they are discrete charges we incurred to issue our credit facility. Management excludes these expenses from internal measurements of credit facility interest rates and in evaluating current performance. Management believes that utilizing non-GAAP financial measures that exclude these items is useful in providing an alternate measure that is reflective of the ongoing characteristics of the amended credit facility.

(6)

These amounts represent the foreign exchange effect on non-current foreign tax liabilities recorded for possible assessments by tax authorities. Changes in foreign exchange rates are a non-cash impact to these liabilities that management excludes from internal measurements and from forecasting future results and are not viewed by management as being reflective of the business' ongoing tax position.

(7)

The tax effect of non-GAAP adjustments represents the difference in the provision for income taxes that resulted from non-GAAP adjustments to pretax income and also certain acquisition related and nondeductible stock based compensation items, and non-cash valuation allowance charges and releases related to deferred tax assets. These amounts are excluded as non-GAAP adjustments as the restructuring activities and acquisitions are not viewed by management as being reflective of the business' ongoing tax position.

(8)

Free cash flow is a non-GAAP financial measure defined as operating cash flow less cash paid for capital expenditures. We consider free cash flow to be a liquidity measure which provides useful information to management and investors about the amount of cash generated by the business after our capital expenditures, which can then be used for strategic opportunities including, among others, investing in Microsemi's business, making strategic acquisitions, reducing debt principal and strengthening the balance sheet. Management uses free cash flow as a supplemental measure to the net change in cash and cash equivalents as presented in Microsemi's consolidated statements of cash flows prepared in accordance with GAAP which incorporates all cash movements during the period.