Building Management System (BMS): An Overview & How It Differs from BIM

Here’s a figure to sit down with: The U.S. Environmental Protection Agency reports that a typical business structure wastes close to 30% of the energy it consumes. That’s not a rounding error. That’s real money flowing from ineffective systems, year after year.

Cue the building management system. It’s the remedy hiding in plain sight for facility managers everywhere. And it does so much more than merely watch the thermostat.

A building management system, or BMS, is a digital roof over a building’s HVAC systems, lighting control, security systems, and building systems of all kinds. It provides building managers with total management from one dashboard.

Recent market research predicts that the worldwide market for such systems will almost triple in the next few years, meaning that this technology is rapidly shifting from being an option to a norm.

The European Union encourages the adoption of Building Automation Control Systems (BACS) in tertiary buildings. The main focus of this decision is to make buildings more energy efficient while cutting down on CO2 emissions.

Naturally, this comes as a sharp and marked push towards widespread adoption of BMS all around the globe.

So let's break it down piece by piece in this blog.

What Is a Building Management System?

The first question that we need to answer, and perhaps the most pertinent one: what is a building management system (BMS), really?

We can think of it as a combination of hardware and software working together to check and control the mechanical and electrical systems of a building. These functions include air conditioning, heating, cooling, security, lighting, control to access, fire alarms, elevators, etc.

What a BMS actually aims for is make the most of energy usage and overall functioning of the building so its occupants can experience maximum comfort.
And what helps a BMS do this?

Data it gathers from sensors throughout the building. It then evaluates the collected data and uses the same to improve the performance factors of the building. For example, this could mean turning the temperature levels up or down as per occupancy levels or turning off the lights in unoccupied rooms.

But that’s not all.
BMS also works hard to save energy. Moreover, it provides necessary info to facility managers and building operators so they know which areas need working on before those become causes of a major maintenance headache.

Many modern BMS communicate with other building systems, such as security and access control systems, to provide a complete picture of the building's operation.
A Building Management System is quite an important tool in the management and maintenance of large, complex buildings, helping to ensure that they are operated in an efficient, safe, and effective manner.

For example, the BMS software in a hospital may sense the temperature rising in a server room and instantly switch on air conditioning before equipment fails. A mall might turn down the lights in an empty parking garage at 2 AM to save energy.

You’ll commonly see it written out entirely as building management system (BMS) throughout the business, then reduced to just “BMS” from there on.

Simply said, a contemporary building management system makes the disparate building operations work together as one integrated operation.

How Do Building Management Systems Work?

At their core, building automation systems rely on three ingredients: sensors, controllers, and software.

Sensors collect real-time data on temperature, humidity, occupancy, and air quality.

Controllers then act on that data instantly.

Software connects the system together.

Picture a large office tower.

Sensors detect that the east wing sits empty after 6 PM. In response, control systems lower the heating systems and dim the lighting automatically. Meanwhile, security systems arm themselves, and alarm systems switch to night mode.

That's efficient management in action with every automation system talking to every other, without a human having to lift a finger.

Why Are Building Management Systems Important?

Cost Savings

When a building management system is well-tuned, it can dramatically reduce a facility's energy use, leading to lower operating expenses quarter after quarter.

Take a store chain, for instance. With HVAC systems and lighting control aggregated across more than fifty locations, an operator may identify a failing rooftop unit before it adds thousands to the electricity bill, helping to cut large expenses.

Protecting People

A BMS protects people, too. When you have one platform linking fire systems and alarm systems, it is easier to respond to emergencies quickly. Air quality sensors detect improper ventilation before it becomes a health concern, an issue that data centers and hospitals can't afford to ignore.

Operational Efficiency

When normal building activities run on autopilot, building operators can focus on strategy instead of firefighting. In turn, this helps them achieve true operational efficiency and, eventually, optimal building performance.

How Does a Building Management System Work?

Each building management system is structured in layers, and understanding these levels tells a lot about the functioning of the system.

• Field devices: The electrical devices, valves, and sensors do the physical work of opening dampers, switching on pumps, and dimming lights at the first level.
• Degree of automation: At this level, the control systems read data based on a set of logic determined beforehand and send instructions accordingly.
• Software: This level provides building operators with a management-level dashboard for oversight, reporting, and manual overrides.

Let’s take an airport terminal, for example. Sensors on the field track and feed in data about the flow of passengers. But controllers can view and control ventilation systems in real time – automating the process. Finally, enterprise-grade software at the management level recognizes patterns and alerts facility managers, putting together maintenance schedules so that elevators, air conditioning, and power systems keep running smoothly.

A tiered approach checks all the boxes for building automation control systems. This way of operating helps to ensure a building stays running smoothly, with individual layers getting upgrades, downtime, and updates on their own.

When Does BMS Become an Important Requirement?

Not every building needs a BMS on day one. But some factors can change the math quickly. What are those? Let's find out!

• Size: Once a property exceeds 50,000 square feet, manual monitoring is no longer an efficient management tool.
• Complexity: A single-tenant warehouse can get by without much automation, but a multi-tenant office tower, hospital, or data center can't.
• Regulations: Many cities now demand energy benchmarking for commercial buildings. A building energy management system makes that reporting almost automatic, rather than a tedious, manual, and error-prone effort.
• Scale: If you're scaling a firm from one location to five sites, standardizing on building management technologies early saves a messy and costly upgrade down the road.

In all these scenarios, the true question is not whether to deploy a BMS but when.

What Are the Criteria to Have an Integrated Building Management System?

Multiple factors separate a really integrated building management system from a patchwork of fragmented apps. Here is a look at the matters to be taken into consideration before integrating a BMS for your assets.

Interoperability: The system must talk to HVAC systems, security systems, fire systems, and lighting control systems without having to log in to each separately.

• Scalability: A successful system should grow with the building or the asset without having to pull out current wiring or existing buildings’ equipment.
• Real-Time Data Access: Facility managers need live dashboards, not reports that are a day old, so they can evaluate data and act on it instantly.
• Cybersecurity: As automation systems are connected to wireless networks and the cloud, the security of the network infrastructure is a must.
• Ease of Use: A sophisticated data analytics technology is useless if building operators can’t navigate it under duress. For instance, a huge campus may have forty buildings all under one interface – but only if that night-shift operator can still utilize it at 3 AM.

How Do BMS & BIM Differ?

BMS and BIM sound the same, are part of the same industry, even share data, yet have completely different purposes.

What Are the Latest Innovations in Building Monitoring Systems?

Monitoring systems have evolved much beyond simple on-off switches. Here are the latest trends in the field of BMS.

• Machine Learning or ML: In BMS, ML helps to predict equipment failure way before it takes place, such as spotting a chiller that requires servicing weeks before it actually stops or breaks down.
• Wireless Networks: These have completely transformed the game. Retrofitting existing buildings once entailed ripping into walls to run new wire. Now wireless sensors attach to existing wiring – or do away with wiring altogether – slashing installation and downtime substantially.
• Data Analytics Platforms: Collect data from every aspect of a building, such as electrical systems, air-quality sensors, and elevators, and transform it into plain-language recommendations.
• Digital Twin: These virtual replicas, created from BIM data, now allow operators to simulate modifications before touching a single actual system, from campuses to large data centers.
• Other Intelligent/ Smart Building Technology: Directly integrates with renewable energy sources, changing non-critical loads to match the availability of solar or wind, and attaining significant energy savings in the process.

How Does the Future of BMS Systems Look?

Buildings will soon be self-managing with smoother interaction with BMS, BIM, and IoT platforms. When the design model changes, the operational system instantly updates and vice versa.

Artificial Intelligence (AI) will move from prediction to action, altering HVAC systems, energy demand, and lighting management in real time, without waiting for a human nod.

As more and more control systems are connected to public networks, cybersecurity will be ever more present in every communication.

Sustainability will continue to drive adoption. As renewables go mainstream, a building’s energy use will progressively flex to what the grid can provide cleanly.

That is to say, smart buildings will not only react, but they will also anticipate, providing the best working environment with significantly less waste or harm to the planet.

Parting Words

Building management systems are no longer a luxury for skyscrapers and data centers. This is increasingly the case for any commercial facility that wishes to stay efficient, safe, and competitive in the modern age.

Meanwhile, BIM services and BMS, while different in design, continue to converge.

Whether a corporation is installing its first building automation system or upgrading a decade-old one, the goal is the same: to make separate building operations into one smart, responsive whole – and to turn wasted energy into meaningful cost savings.

FAQs

What does BMS stand for?

BMS stands for Building Management System – the software and technology that monitor and control a building's HVAC systems, lighting, security systems, and other fundamental systems from one platform.

What is the difference between BAS and BMS?

Technically speaking, a BAS (Building Automation System) is narrowly focused on HVAC and lighting automation, while a BMS has a broader scope encompassing energy management, security, and reporting.

What is the BMS system in HVAC?

When speaking of HVAC, we see that a BMS comes in to adjust cooling, heating, and ventilation based on the real-time data it receives from the system. This data can deal with the occupancy rate and the current temperature. Having BMS handy helps in making air conditioning systems more efficient without too much human intervention.

What is the most common BMS system?

The most common approach for BMS is choosing a centralized and HVAC-based platform. One of the reasons why this gets a lot of priority is that once heating and cooling are tackled, most of the building's energy usage is covered. Some of the big players in this field are vendors such as Siemens, Johnson Controls, and Honeywell.

What is the difference between BIM management and project management?

BIM management covers the digital model from design to construction, including geometry, data, and clash detection. The project management team deals with the budget, schedule, and personnel for the entire project, utilizing BIM as one tool in the toolbox.

Are BIM and BMS the same?

No, BIM and BMS are different. BIM or Building Information Modeling deals with the design and development, or construction stage of the building, with 3D models integrating multiple trades. BMS, on the other hand, comes into the picture after a building is constructed. While they share a lot of common data between them, they address wholly different challenges in the development and management of a built asset.

What do building management systems do?

Building management systems offer building operators a single dashboard to monitor and operate a building's essential services, such as HVAC, lighting, security systems, fire systems, and energy management, to help save expenses and improve building efficiency.

What is a BAS system?

A BAS automates some building processes, including temperature, lighting, and ventilation systems. It's generally viewed as one component of a bigger, more complete BMS.

What are the three levels of BMS?

The three levels of BMS are: field level for sensors and actuators, automation level for controllers, and management level with software dashboards for oversight and reporting.

What is an example of a BMS?

Imagine a critical building, such as a hospital. When it controls its HVAC systems and vents, monitors air quality, checks on the security systems, and uses alarm triggers in case of emergencies such as a fire, from a centralized platform, that is a real-world example of BMS in action.

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