1. The defendant shall pay to the plaintiff KRW 21,300,000.

2. The costs of the lawsuit are assessed against the defendant.

3.Paragraph 1.

1. The assertion and judgment

A. Comprehensively taking account of the overall purport of the pleadings as to the evidence Nos. 1 and 2 as to the cause of the claim, the Defendant is obligated to pay the remainder KRW 21,300,000 to the Plaintiff on April 30, 2014, as requested by the Plaintiff for the installation of electrical equipment and program. ② The Plaintiff completed the work requested by the Defendant, but did not receive KRW 21,30,000 from the Defendant. As such, the Defendant is obligated to pay the remainder to the Plaintiff as requested by the Plaintiff.

B. As to the judgment of the defendant's assertion, the defendant alleged that the plaintiff cannot respond to the plaintiff's claim because it is not a mechanical linkage due to the malfunction, but there is no evidence to acknowledge it, and the defendant's above assertion is without merit.

2. It is so decided as per Disposition by the assent of all participating Justices on the ground that the plaintiff's claim of this case is reasonable.