A. The Plaintiff is a company running the civil engineering design service business, etc., and the Defendant is a company running the construction design and supervision business.

C District Housing Redevelopment Development Promotion Committee (hereinafter referred to as the "Promotion Committee") is an organization organized to establish a cooperative that implements a project to newly build multi-family housing, etc. (hereinafter referred to as the "instant rearrangement project") in the area of Gu/Si/Gu in accordance with the Act on the Maintenance and Improvement of Urban Areas and Dwelling Conditions for Residents (hereinafter referred to as the "Promotion Committee") on November 14, 2007.

The scope of services provided by Article 3 (Scope of Services) B (Defendant) to Gap (Promotion Committee) shall be as follows:

1. In preparing the following books, Eul shall prepare a development plan at his/her own initiative and prepare the following books:

(1) Preparation of books necessary to formulate a rearrangement plan and designate an improvement zone.

2. B shall promote the following affairs on the basis of the basic design prepared pursuant to paragraph (1) in providing services:

(1) The following matters, such as the preparation of general books, plan designs, basic plans, execution design documents, and completion documents necessary for the authorization to implement a project.

1. A shall be paid to B an amount calculated by multiplying the total floor area by the amount per square meter;

2. The time and method for payment by Gap to Eul shall be as follows:

When applying for designation of a separate rearrangement zone with 10% additional tax when filing an application for designation of a 10% additional tax, when filing an application for designation of a separate rearrangement zone with 15% additional tax implementation plan, 25% additional tax implementation plan when completing the separate implementation plan of 10% additional tax implementation plan.