A. The defendant is a company that newly constructs and sells 23 stories underground and 23 stories above ground (hereinafter "the project in this case") in the Do of Gyeongnam-do. The plaintiff is a company established for the purpose of design, construction, supervision, etc. of buildings, and is contracted for the construction of the above apartment (hereinafter "the project in this case") with E Co., Ltd. (hereinafter "E") in the method of sharing performance.

Plaintiff

The succeeding intervenor is the transferee of part of the claim for the construction cost against the defendant.

B. 1) On September 25, 2014, the Plaintiff and joint contractor E entered into a contract for the instant construction work with the Defendant, a contractor (hereinafter “instant contract for construction work”).

In the instant construction contract, the scope of the Plaintiff and E’s work scope and construction amount are as follows. ① The scope of the contract for construction work between the Plaintiff and E is as follows. (1) The scope of the contract for construction work is as follows. (a) The Plaintiff and E’s work scope are as follows: (a) the scope of construction work shall be performed by means of the sharing of work units according to the following work scope, specified in the joint supply and demand agreement. The Plaintiff’s work scope is as follows: (a) the Plaintiff: the Plaintiff: the Plaintiff: (including the Plaintiff: (a) the construction, civil engineering, landscaping, etc. (including elevators): the Plaintiff’s construction, telecommunication, fire-fighting, and machinery and equipment-related construction, and the ratio of the Plaintiff’s warranty bond to KRW 76.64% by 36% by classifying the scope of the project from the scope of the project; (63,636,50,000,000 won by the Plaintiff’s warranty bond 19,400,0000 won; and (b) the Defendant