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Segment Information | 3 Months Ended
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Mar. 31, 2013
Segment Information | P. Segment Information Teradyne has three operating segments (Semiconductor Test, Wireless Test, and Systems Test), which are its reportable segments. The Semiconductor Test segment includes operations related to the design, manufacturing and marketing of semiconductor test products and services. The Wireless Test segment includes operations related to design, manufacturing and marketing of wireless test products and services. The Systems Test segment includes operations related to design, manufacturing and marketing of products and services for military/aerospace instrumentation test, storage test and circuit-board test. Each operating segment has a segment manager who is directly accountable to and maintains regular contact with Teradyne’s chief operating decision maker (Teradyne’s chief executive officer) to discuss operating activities, financial results, forecasts, and plans for the segment. Teradyne evaluates performance based on several factors, of which the primary financial measure is business segment income before income taxes. The accounting policies of the business segments are the same as those described in Note B “Accounting Policies” in Teradyne’s Annual Report on Form 10-K for the year ended December 31, 2012. Segment information is as follows:
|  | Semiconductor Test |  |  | Wireless Test |  |  | Systems Test |  |  | Corporate and Eliminations |  |  | Consolidated |
|  | (in thousands) |
Three months ended March 31, 2013: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues |  | $ | 211,506 |  |  | $ | 33,598 |  |  | $ | 35,263 |  |  | $ | — |  |  | $ | 280,367 |
Income (loss) before income taxes(1)(2) |  |  | 13,766 |  |  |  | (9,997 | ) |  |  | 1,530 |  |  |  | (6,725 | ) |  |  | (1,426 | )
Three months ended April 1, 2012: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues |  | $ | 267,588 |  |  | $ | 31,328 |  |  | $ | 97,752 |  |  | $ | — |  |  | $ | 396,668 |
Income (loss) before income taxes(1)(2) |  |  | 34,998 |  |  |  | (12,312 | ) |  |  | 21,978 |  |  |  | (3,420 | ) |  |  | 41,244 |
(1) | Interest income and interest expense and other are included in Corporate and Eliminations.
(2) | Included in the income (loss) before income taxes for each of the segments are charges and credits for the three months ended March 31, 2013 and April 1, 2012 that include restructuring and other, and provision for excess and obsolete inventory, as follows:
Included in the Semiconductor Test segment are charges for the following:
|  | For the Three Months Ended |
|  | March 31, 2013 |  |  | April 1, 2012 |
|  | (in thousands) |
Cost of revenues—provision for excess and obsolete inventory |  | $ | 213 |  |  | $ | 212 |
Total |  | $ | 213 |  |  | $ | 212 |
Included in the Wireless Test segment are charges for the following:
|  | For the Three Months Ended |
|  | March 31, 2013 |  |  | April 1, 2012 |
|  | (in thousands) |
Cost of revenues—inventory step-up |  | $ | — |  |  | $ | 4,871 |
Cost of revenues—provision for excess and obsolete inventory |  |  | 2,668 |  |  |  | 473 |
Total |  | $ | 2,668 |  |  | $ | 5,344 |
Included in the Systems Test segment are charges for the following:
|  | For the Three Months Ended |
|  | March 31, 2013 |  |  | April 1, 2012 |
|  | (in thousands) |
Cost of revenues—provision for excess and obsolete inventory |  | $ | 919 |  |  | $ | 889 |
Restructuring and other |  |  | 244 |  |  |  | — |
Total |  | $ | 1,163 |  |  | $ | 889 |
Included in Corporate and Eliminations are credits for the following:
|  | For the Three Months Ended |
|  | March 31, 2013 |  |  | April 1, 2012 |
|  | (in thousands) |
Restructuring and other |  | $ | — |  |  | $ | (1,825 | )
Total |  | $ | — |  |  | $ | (1,825 | )

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8864-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8933-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8984-108599 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8380-108599 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8538-108599 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8595-108599 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8981-108599 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8971-108599 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8844-108599 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599 Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 + Details
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