NOMURA and Nohara Group announce demonstration results of interiors pre-cut construction method using BIM*1

Delivering "Delight and Passion" to People through Space Creation NOMURA CORPORATION ( HEADQUARTERS: MINATO-KU, TOKYO, REPRESENTATIVE DIRECTOR: KIYOTAKA OKUMOTO, HEREINAFTER REFERRED TO AS "NOMURA") AND NOHARA GROUP CO., LTD. (HEADQUARTERS: SHINJUKU-KU, TOKYO, REPRESENTATIVE DIRECTOR: KOSUKE NOHARA, HEREINAFTER REFERRED TO AS "NOHARA GROUP"), WHICH IS WORKING ON CONSTRUCTION DX WITH BUILDApp® *2, are experiencing a shortage of craftsmen, interiorsWe continue to take on the challenge of DX with a focus on BIM in order to accelerate the resolution of issues in the display industry, such as waste materials in construction and the lack of established CO2 reduction methods.

With the cooperation of building material manufacturers and specialized construction companies and other stakeholders in the construction supply chain, the two companies will hold an interiors exhibition at the Nomura Training Center (2-1-8 Shinkiba, Koto-ku, Tokyo) from January to February 2023. We conducted a comparative experiment between the pre-cut construction method *3 and the conventional construction method for the main building materials of walls, floors, and ceilings in constructions.

In this demonstration, the technical service of the Nohara Group's "BuildApp" was utilized, and the pre-cut method was adopted for constructions. The results showed a 26.5% reduction in on-site waste materials, a 29.6% reduction in CO2 emissions from waste materials, and a 13.7% reduction in on-site work time. On the other hand, in order to increase the effectiveness of the pre-cut method, it became clear that it was necessary to verify different improvement measures for each building material.

NOMURA KOGEISHA AND THE NOHARA GROUP WILL CONTINUE TO COOPERATE AND VERIFY THAT THEY CAN CONTRIBUTE TO THE ACCELERATION OF DX IN THE DISPLAY INDUSTRY AND AT THE SAME TIME CONTRIBUTE TO SOLVING ISSUES RELATED TO THE INDUSTRY.

*1 BIMis an abbreviation for Building Information Modeling.​ A system that streamlines operations by utilizing the information in design, constructions, and maintenance by having "attributes" such as floors, walls, and ceilings and "management information" such as finishing, cost, and schedule in a three-dimensional digital model.
*2  BuildApp​® replaces BIM design data created by design offices and general contractorswith more detailed data. This is a cloud service of Nohara Group Co., Ltd. that uses the data necessary for each construction process to improve the productivity of the entire construction process.
*3The pre-cut method is a construction method that uses materials that have been processed in a factory in advance. In conventional construction methods, it is often processed on site.


■Outline of demonstration of interiors precut construction method using BIM

1. Background
Traditionally, constructions have relied on the skills of highly experienced craftsmen. Currently, one of the challenges in the industry is the impact of the declining birthrate and aging population and the lack of successors due to the image of the work environment as 3K (hard, dirty, and dangerous). DX is expected to be effective in compensating for labor shortages, but the reality is that its introduction is slower than agriculture because the benefits of introducing it are difficult to see.
We believe that it is important to visualize issues in order to accelerate the resolution of issues through DX, and we have decided to conduct a demonstration experiment on the theme of how much on-site man-hours and CO2 emissions can be reduced (reduction of waste materials and improvement of recycling rate) through DX in the entire supply chain (SCM) using the pre-cut construction method that utilizes BIM data, which is a digital technology.

2. Purpose of implementation
(1) Comparative verification and numerical visualization of the following items of the pre-cut construction method and the conventional construction method for walls, floors, and ceilings
・Amount of on-site waste materials
・CO2 emissions from on-site waste materials
・On-site work time (on-site man-hours)
(2) Identification of issues for the implementation of the pre-cut method

3. Implementation details

4. Demonstration results


5.Summary and future outlook
Although a certain amount of man-hour and CO2 reduction effects were obtained, there were differences in the effects depending on the building material. In order to further improve effectiveness, it is necessary to verify improvement measures suitable for each building material.
NOMURA and the Nohara Group will continue to verify and establish the interiors pre-cut construction method using BIM as a DX service for the display industry.

*Fournomura training centeris a stage where NOMURA Group and partner companies come together to co-create human resources that will help solve customers' problems and create new value.2016Established in .

<Cooperating companies> (in alphabetical order)