NOMURA and Nohara Group announce the results of a demonstration experiment using BIM*1 for interiors precut construction method

Delivering "Delight and Passion" to people through space creation NOMURA Co., Ltd. (Headquarters: Minato-ku, Tokyo, Representative Director: Kiyotaka Okumoto, hereinafter referred to as "NOMURA") and BuildApp® *2 Nohara Group Co., Ltd. (Headquarters: Shinjuku-ku, Tokyo, Representative Director: Kosuke Nohara, hereinafter referred to as "Nohara Group"), which is engaged in construction DX in Japan, continues to take on the challenge of DX centered on BIM in order to accelerate the resolution of issues in the display industry, such as the shortage of craftsmen and the lack of established methods to reduce waste materials and CO2 emissions in interiors construction.

From January to February 2023, the two companies collaborated at the Nomura Training Center (2-1-8 Shin-Kiba, Koto-ku, Tokyo) to conduct 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 interiors construction with the cooperation of stakeholders in the construction supply chain, including building material manufacturers and specialized construction companies.

In this demonstration, the construction, which uses the pre-cut construction method by utilizing the technical services of the Nohara Group's "BuildApp", has achieved 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 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 the problems of industry stakeholders by utilizing DX.

*1 BIMis an abbreviation for Building Information Modeling.​ A three-dimensional digital model with "attributes" such as floors, walls, and ceilings, as well as "management information" such as finishes, costs, and schedules, and a system that streamlines operations by utilizing the information for design, construction, and maintenance.
*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 the demonstration of the interiors pre-cut method using BIM

1. Background
Traditionally, construction has relied on the skills of 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 its introduction 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 prospects
Although a certain level of reduction in labor hours and CO2 emissions was achieved, differences in the effects were observed depending on the building materials. To further improve the effects, it is necessary to verify improvement measures suitable for each building material.
NOMURA and the Nohara Group will continue to conduct further testing and establish the interiors precut construction method using BIM as a digital transformation service for the display industry.

*4Nomura Training Centeris a platform where NOMURA Group and its partner companies can come together to collaborate and develop human resources who can contribute to solving customer problems and creating new value.2016Opened in .

<Partner companies> (in alphabetical order)