1. The plaintiffs' respective primary and conjunctive claims against the defendant are all dismissed.

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

1. Basic facts

A. The defendant is a public corporation established under the Housing and Urban Fund Act to perform the duties of a housing sale guarantee and a housing lease guarantee, etc., and the plaintiffs are the defendant's workers.

B. In introducing a performance-based incentive system on June 2010, the Defendant changed the wage system to pay wages to past employees by dividing them into basic wages, job allowances, overtime work allowances, other allowances (work allowances, family allowances, adjustment allowances), and performance-based bonuses (management evaluation performance pay), ① basic annual salaries consisting of basic annual salary and job-based salary, ② performance-based performance-based incentives consisting of performance-added and management evaluation performance pay, ③ other additional annual salaries (over-time allowances, annual paid leave allowances).

C. Among performance-based incentives, the Defendant’s performance-based bonus is ① self-performance wage that is paid an amount equivalent to 50% of the monthly basic salary (based on the total amount paid to all employees; hereinafter the same shall apply) once every year in the year in which the payment is made after evaluating the performance of the previous year; ② Management evaluation conversion fee that is paid with an amount equivalent to 250% of the monthly basic salary during the previous year during the year in which the payment is made after evaluating the performance of the previous year; ③ abolition of the allowance that is paid with an amount equivalent to 80% of the monthly basic salary during the previous year during the year in which the payment is made after evaluating the performance of the previous year; ④ Adjustment allowance and abolition of the allowance that is paid with an amount equivalent to 40% of the monthly basic salary on the date of payment of the previous year on the date of payment of the previous year; and ⑤ An amount that is paid for executive employees by evaluating the performance of the previous year in the previous year.

In addition, the government's performance evaluation performance rating of performance-based incentives (S-A-B-C-D-E rating) as stipulated in Article 48 of the Act on the Management of Public Institutions is conducted in the previous year.