Cut Waste on Construction Sites! 5 Methods to Achieve Efficiency [The Definitive Site Improvement Guide]

In the construction industry, chronic labor shortages and tight schedules make improving on-site productivity a critical issue. To cut waste on construction sites and improve efficiency, it is essential to reassess traditional practices and actively adopt digital technologies and new methods. The Ministry of Land, Infrastructure, Transport and Tourism’s *i-Construction* initiative even sets a goal of “improving construction site productivity by 20% by 2025,” so there is no time to waste on site DX-driven efficiency. This article introduces five concrete measures for site efficiency that can serve as references for construction company executives, site supervisors, and DX promoters. We explain the challenges and improvement methods in surveying, schedule management, drawing digitization, information sharing, and safety management, organizing each into the flow “Challenge → Improvement Approach → Implementation Points → Expected Effects.” Use these ideas as hints for improving your own sites.

1. Streamlining Survey Work: Reduce manpower with drones and smartphones

Challenge

Surveying is indispensable in civil engineering and construction, but traditionally experienced surveyors would travel to the site in teams, using total stations and levels to measure many points. On large sites or highly uneven terrain, surveying can take many days, becoming a bottleneck that prevents other work from progressing. Surveying at heights or on steep slopes is dangerous, and with labor shortages it is difficult to allocate personnel consistently. The inefficiency of surveying processes affects overall site progress and leads to significant waste and cost increases.

Improvement Approach

Using ICT technologies to reduce labor is effective for survey efficiency. Specifically, this includes automated aerial surveying with drones (unmanned aerial vehicles) and one-person surveys using smartphones equipped with LiDAR. Drone surveying can rapidly capture the entire site from above and obtain detailed terrain data via photogrammetry software or laser scanners. Areas such as cliffs or hazardous spots that were previously inaccessible can be assessed without personnel entering them, contributing to improved safety. Recently, “smartphone surveying” technologies have emerged that attach small RTK‑GNSS-capable devices to smartphones for high-precision positioning. This enables a single surveyor to perform layout work and as-built measurements on site, eliminating the need for the traditional multi-person teams. By leveraging these latest technologies, surveying work itself can be dramatically streamlined.

Implementation Points

When introducing drone surveying, it is important to first select the appropriate method (photogrammetry or laser surveying) and equipment according to the purpose. For example, use a drone equipped with a laser scanner for wide-area earthworks, and photogrammetry for high-detail structural measurements. Drone operation requires compliance with rules such as qualification acquisition and flight permission applications, so establish the necessary systems in advance. When adopting new smartphone-based surveying equipment, provide education and pilot deployments for site staff, then create manuals for the optimal usage per site. The key is to balance ease of use so anyone can operate it with ensuring the accuracy of measurement data. While initial investment and internal resistance are possible, start by piloting on a single site to verify effects and then roll out gradually.

Expected Effects

The effects of digitizing and reducing manpower in surveying processes are enormous. First, there is a reduction in working time. For example, a conventional 2-hectare land survey that used to take 2–3 days has been reported to be completed by drone in about half a day (actual flight time around 1 hour), roughly a 1/6 reduction in time. Similarly, a river survey that previously required 5 days was completed in 1 day using drones. Next, reduced manpower and improved safety are significant. Where several surveyors were previously required, ICT surveying can be performed by one person, allowing other workers to be reassigned. Surveys at heights or in hazardous areas can be substituted by drones or remote measurement, reducing worker risk. Furthermore, the acquired data are high-density 3D point cloud data, enabling precise difference checks for as-built control and high-accuracy responses to design changes in later stages, reducing rework and improving overall efficiency.

2. Improving Progress and Schedule Management: Construction management by “visualization”

Challenge

Schedule management is essential for smooth execution of construction projects, but traditional progress management often depends on each site supervisor’s personal method. Many sites still manage work schedules with paper schedules or whiteboards, requiring visits to the site to confirm the latest progress or waiting for daily reports to be submitted. For multiple concurrent projects or remote sites, real-time information sharing becomes difficult, increasing the risk of delayed detection and response to issues. The later schedule delays are noticed, the more they push on later processes, causing overtime and additional costs. The inefficiency of progress management can lead to serious risks such as delays and complaints.

Improvement Approach

To streamline schedule management, it is important to visualize progress. Recently, construction management apps and cloud services that allow real-time sharing and verification of progress have become widespread. Specifically, create and update Gantt charts (schedules) on PCs or tablets and place them on a cloud where all stakeholders can access them. If there is a schedule change on site, update the schedule instantly from a smartphone and notify everyone so the latest information is always shared. Additionally, including headquarters and staff from other sites allows an overview of the entire project, making it easy to redeploy resources (workers and machinery) at the right time. In short, creating an environment where everyone can collaborate while viewing the same up-to-date information using digital tools leads to more efficient progress management.

Implementation Points

When implementing progress management tools, choose a system that matches the site’s reality and consider the IT literacy of site staff. Overly feature-rich systems can be complex to operate and may not take root on site, so choose a simple and intuitive service. Early on, provide careful explanations and support to site supervisors and foremen. For staff accustomed to paper forms, a phased approach where paper and digital are used in parallel for a transition period can be effective. Don’t forget to improve network environments: install Wi‑Fi in site offices or provide tablets with cellular connectivity so that cloud access is always available. Finally, after adopting tools, establish operational rules. For example, require “progress reported in the app after daily morning briefings” or “alert superiors immediately when signs of schedule delays appear” to ensure the digital tools are effectively used.

Expected Effects

Visualization of schedule management can significantly reduce the risk of schedule delays. When everyone can access the latest progress, issues can be addressed early, providing more slack for the overall schedule. You can order necessary personnel and materials earlier, reducing waiting time and setup waste. One construction company reported a 5% improvement in gross margin on large projects after introducing a cloud-based schedule management system due to faster coordination. Smooth information sharing also means quicker trouble response. Even with bad weather or unexpected defects, multiple stakeholders can simultaneously grasp the situation and quickly take optimal measures. Additionally, by making progress management organizational rather than individual-dependent, you avoid overburdening site agents. As a result, unnecessary overtime is reduced and trust among stakeholders improves, contributing to overall project productivity.

3. Digitizing Drawings and Documents: Go paperless to share information

Challenge

Many drawings and documents are still exchanged in paper form on construction sites. Printing construction drawings and rebar drawings and bringing them to the site is convenient, but every time a drawing is updated you must replace and redistribute it, making it laborious to ensure everyone has the latest version. Using paper drawings can lead to mistakes such as “a craftsman working from an outdated drawing,” causing rework and material waste. Analog tasks like traveling between site and office to get stamps on documents, filing and mailing completion documents also accumulate into large losses. Paper-based drawing and document management is an inefficiency due to storage space and printing costs, and it causes delays and errors in information sharing.

Improvement Approach

Digitizing drawings and documents can eliminate these wastes all at once. For drawings, manage them as digital files such as PDFs and switch to viewing on tablets or PCs. Instead of carrying large rolled drawings, bring tablet devices to the site so you can always view the latest drawings with zooming. With design changes, updating the latest file on the cloud allows immediate access for everyone and prevents distribution omissions. It is also effective to digitize documents such as construction plans, safety documents, and daily reports using dedicated cloud services or construction information-sharing systems. For example, implementing a system where daily reports are entered on a smartphone and submitted to the cloud eliminates the site supervisor’s need to return to the office daily to collect paper reports. In short, going paperless speeds up administrative work and information transmission, the key to site efficiency.

Implementation Points

When moving toward paperless operations, map out workflows for both site and office and proceed with a phased digital transition. Trying to digitize everything at once can confuse the site, so start with high-impact, relatively easy items like drawings and daily reports. Reduce resistance among site staff by providing tablet use training and carefully explaining the benefits of digitization (easy search, easy to carry, etc.). Also set rules for managing electronic data in advance: standardize file naming and folder classification so anyone can quickly find necessary drawings and documents. Ensure IT governance such as backups for important documents and server access controls to secure data. Keep paper originals that must be retained for legal retention periods in storage; dispose of other documents after digitization, balancing paperless goals with operational requirements.

Expected Effects

Digitizing drawings and documents dramatically improves information sharing speed. For example, time previously spent replacing paper drawings at the site disappears, and errors in communicating design changes are eliminated. Always working from the latest information reduces rework and prevents quality defects. There are also printing and storage cost savings: no need to print multiple copies of drawings and office storage space can be used more effectively. Sites that digitized daily reports reported daily report creation time was cut in half, greatly reducing administrators’ documentation workload. Centralizing documents in the cloud reduces time spent searching, eliminating the waste of “looking for things.” Past drawings and documents can be found instantly via keyword search, enabling quick responses to inquiries and faster consideration of additional work. Thus, going paperless streamlines daily accumulated tasks and smooths communication between site and office.

4. Cloud Sharing and Information Integration: Connect the site and the office

Challenge

Lack of smooth information linkage between the site, the company, and subcontractors also creates large waste. Traditionally, progress reports and document transfers were done by phone, fax, or email, but information tended to remain with individual staff, causing missed shares and time lags. For example, in some departments updated design documents weren’t passed to the site agent, leading to construction based on old drawings. Managers traveling to remote sites to check conditions in person is another inefficiency. If information is not shared in real time, decision-making is delayed and trouble response is slowed. This lack of information integration generates losses across construction projects and impedes productivity improvements.

Improvement Approach

A solution is centralized information management using a cloud platform. Specifically, aggregate all project-related data—drawings, schedules, contracts, photos, reports—on the cloud and allow stakeholders to access as needed. This lets headquarters immediately review photos and daily reports uploaded from the site, or let designers check 3D model data from the office, enabling the same information to be shared simultaneously across geographical barriers. Tools with chat and comment functions on the cloud enable Q&A and approval flows for drawings and documents to be completed online, speeding decision-making. The point is to eliminate the “information gap between site and office” with the cloud and create an environment where everyone can always access the latest information.

Implementation Points

When introducing cloud services, first define the scope of information handled internally and the sharing ranges. Organize folders and permissions per project to clarify who shares what information and ensure appropriate collaboration. Even if you equip the site with tablets or PCs, they are useless if not used, so improve the site’s communication environment. In areas where LTE or 5G is unstable, consider portable Wi‑Fi or repeaters. To dispel concerns about placing confidential data in the cloud, confirm the service provider’s security measures (encryption, access restrictions) in advance and communicate them internally. Provide operation training so site clerks and staff reliably learn upload/download procedures. Using multiple systems can cause confusion, so standardizing on a single platform is more effective. If you must use specialized systems, use integration features (API links, etc.) to avoid duplicate data entry.

Expected Effects

When cloud-based information sharing becomes established, communication loss between site and headquarters is dramatically reduced. For example, decisions that once lost half a day waiting for site reports can now be made immediately by viewing shared photos and data. If progress and construction details are shared in real time with other departments, the organization can flexibly respond to sudden schedule changes and provide speedy trouble support. A major benefit is the reduction of duplicate entry and transcription errors: everyone shares a single data source, eliminating the waste of separate Excel ledgers maintained in different places. Site agents also spend less time preparing submission documents for headquarters and can devote more time to supervision. Recently, cloud adoption has accelerated in construction, with more than 60% of companies already using some kind of cloud service. Centralizing information on the cloud directly contributes to operational efficiency and cost reduction and provides a foundation for telework and multi-site management—an indispensable effort for the future of construction.

5. Streamlining Safety Management: Aim for zero accidents with digital technology

Challenge

Safety management is the highest priority on construction sites, but thoroughness requires significant time and effort. Site supervisors and foremen are occupied daily with KY activities (danger prediction activities) in morning briefings, safety patrols, and filling out various inspection forms. Even so, human error-related accidents persist, and a serious disaster can halt work, cause schedule delays, and lead to compensation claims, inflicting severe damage on business. Traditional safety management relies heavily on human experience and vigilance, leaving room for omissions and mistakes. Creating and submitting safety documents (e.g., near-miss reports or documents related to the Industrial Safety and Health Act) is cumbersome, and site staff often say they spend too much time on “formal paperwork.” The inefficiency in safety management not only increases site burden but also risks overlooking preventable accidents, so improvements are necessary.

Improvement Approach

Using IoT sensors and AI technologies is effective for both streamlining and enhancing safety management. For example, wearable sensors that detect proximity between heavy machinery and workers and sound alarms, or AI cameras that monitor the site and automatically detect missing helmets or dangerous area intrusions, enable 24/7 safety monitoring even when human eyes can’t watch every moment. Systems that attach accelerometers to workers’ helmets to detect falls or drops and immediately notify managers shorten initial response times in emergencies. Digitizing safety checklists on tablets with photo attachments prevents inspection omissions and centralizes records. AR technology can visually display virtual no-entry zones on site to provide intuitive warnings. In short, supporting traditional monitoring and inspections with digital tools to detect and respond to risks in real time is the key to efficient safety management.

Implementation Points

When introducing IoT/AI safety tools, prioritize those that address immediate site risks. For example, install fall-detection sensors at sites with a lot of high-altitude work, and collision-avoidance systems where vehicle-based work predominates—introduce technology starting from the highest-risk areas. Initial costs may be required, but national and local government subsidy programs may be available, so gather information. Simply distributing new safety devices will not ensure proper use; hold briefings and training for workers who will actually use them. Sensors may need regular maintenance or battery replacement, so assign responsible personnel to maintain continuous operation. Also, document the use of digital devices in site safety rules and manuals and integrate traditional safety activities with new technologies. Combining “human eyes + digital eyes” in multiple layers increases the reliability of accident prevention.

Expected Effects

Strengthening safety management with digital technologies will greatly increase the prevention rate of workplace accidents. Reducing near-misses and approaching zero accidents not only protects lives but also helps meet schedules and reduce costs. Time and compensation costs spent on accident response are eliminated, allowing focus on productive work. Continuous 24-hour monitoring by sensors and cameras also reduces the mental burden on managers. Digitizing safety documents simplifies daily record-keeping and reduces the time spent on reporting. Studies show that sites introducing wearable sensors and AI monitoring saw a significant reduction in near-miss incidents involving heavy machinery compared to pre-introduction. Improved safety levels directly enhance site reliability, boosting reputation with clients and local communities and ultimately increasing future contract opportunities. “No safety, no efficiency” is often said, and leveraging digital power to achieve zero accidents contributes to true work-style reform and on-site capability improvement.

Start site improvements with “simple surveying”

We have introduced five methods to reduce waste and improve efficiency on construction sites. It may be difficult to adopt everything at once, but the key is to advance DX step by step starting with the areas that offer the greatest impact. One highly recommended first step is to introduce a “simple surveying” system as the entry point for site improvement. Recently, high-precision simple surveying systems using smartphones, such as LRTK, have emerged. With LRTK, attaching a small dedicated device to a smartphone and walking while pointing the camera allows anyone to acquire point cloud data with position information at several-centimeter accuracy (cm level accuracy (half-inch accuracy)). For example, a slope of about 100 m (328.1 ft) can be 3D-scanned in roughly 1 minute. On the acquired point cloud data you can measure distances, areas, and volumes on the spot, and uploading to the cloud allows the office to immediately view and share the 3D model. LRTK also overlays design drawings or model data onto real space via AR, enabling intuitive sharing of completion images and staking position checks. Such tools that combine the ease of use of a single smartphone with survey-grade accuracy are truly trump cards for site efficiency.

Even small initiatives can let you feel the effects of improved efficiency once introduced on an actual site. Simple surveying with LRTK is an ideal entry solution for site DX. It shortens surveying time, enables better personnel utilization, and speeds data sharing—three benefits at once. As a first step in cutting waste on construction sites, please consider using these latest tools. Small, incremental reforms will eventually lead to substantial productivity improvements and higher profit margins. Use the five methods presented in this definitive site improvement guide as hints, and steadily pursue efficiency improvements possible at your own sites.