43.

OPERATING SEGMENTS INFORMATION

Operating segments

The Company’s only reportable segment is the foundry segment. The foundry segment engages mainly in the manufacturing, selling, packaging, testing and computer-aided design of integrated circuits and other semiconductor devices and the manufacturing of masks. The Company also had other operating segment that did not exceed the quantitative threshold for separate reporting. The segment mainly engaged in the researching, developing, designing, manufacturing and selling of renewable energy and efficiency related technologies and products.

From 2016, the Company has only one single operating segment, the segment revenue and operating results were the same as those stated in the consolidated statements of profit or loss and other comprehensive income for both years ended December 31, 2016, and 2017, respectively.

The Company uses the income from operations as the measurement for the basis of performance assessment. The basis for such measurement is the same as that for the preparation of financial statements.

Segment revenue and operating results


	Foundry		Others			Total
	NT$		NT$			NT$
	(In Millions)		(In Millions)			(In Millions)
Year ended December 31, 2015
Net revenue from external customers	$	842,690.2	$	807.2		$	843,497.4
Income (loss) from operations		320,833.2		(785.4	)		320,047.8
Share of profits (loss) of associates and joint venture		4,582.0		(385.6	)		4,196.4
Income tax expense (benefit)		47,646.5		(1.8	)		47,644.7

Geographic information


	Net Revenue from External Customers						Non-current Assets
	Years Ended December 31						December 31,		December 31,
	2015		2016		2017		2016		2017
	NT$		NT$		NT$		NT$		NT$
	(In Millions)		(In Millions)		(In Millions)		(In Millions)		(In Millions)
Taiwan	$	90,169.5	$	127,063.0	$	90,129.4	$	991,567.9	$	1,027,963.2
United States		566,600.2		610,371.1		620,948.7		8,245.0		7,515.9
Asia		123,705.9		146,907.4		194,477.1		14,071.3		44,213.4
Europe, the Middle East and Africa		57,065.0		58,042.3		68,538.3		8.7		8.1
Others		5,956.8		5,554.5		3,353.7		—		—


	$	843,497.4	$	947,938.3	$	977,447.2	$	1,013,892.9	$	1,079,700.6

The Company categorized the net revenue mainly based on the country in which the customer is headquartered. Non-current assets include property, plant and equipment, intangible assets and other noncurrent assets.

Production information


	Years Ended December 31
Production	2015		2016		2017
	NT$		NT$		NT$
	(In Millions)		(In Millions)		(In Millions)
Wafer	$	766,228.8	$	861,170.8	$	874,572.6
Others		77,268.6		86,767.5		102,874.6


	$	843,497.4	$	947,938.3	$	977,447.2

Starting in 2017, revenue from packaging and testing services is reclassified from wafer revenue to other revenue. To have consistent comparative basis, the Company had revised prior years classification.

Major customers representing at least 10% of net revenue


	Years Ended December 31
	2015				2016				2017
	Amount		%		Amount		%		Amount		%
	NT$				NT$				NT$
	(In Millions)				(In Millions)				(In Millions)
Customer A	$	134,117.2		16	$	157,185.4		17	$	214,228.8		22
Customer B		134,158.4		16		107,463.2		11		64,096.2		7