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What are the key performance indicators and metrics for evaluating BMS impact on occupancy and comfort?

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Building management systems (BMS) are designed to optimize the performance and efficiency of buildings, but they also have a significant impact on the occupancy and comfort of the people who use them. How can you measure and evaluate this impact? In this article, we will explore some of the key performance indicators (KPIs) and metrics that can help you assess how well your BMS is supporting the well-being and productivity of your occupants.

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1 Occupancy rate

One of the most basic and important KPIs for evaluating BMS impact is the occupancy rate, which measures how many people are using the building or a specific area at a given time. By monitoring the occupancy rate, you can understand how your BMS is affecting the demand and utilization of your space, and adjust your settings and schedules accordingly. For example, you can reduce energy consumption and costs by lowering the heating, cooling, lighting, and ventilation levels in unoccupied or underutilized zones, or increase them in peak periods to ensure optimal comfort.

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David Grieshaber

CIO | Elisium & Cognitive | cognitive net-zero sponge luxury resort city
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Track occupancy rates, monitor comfort like temperature and air quality, assess BMS uptime and energy consumption, gather occupant feedback. Choose relevant KPIs and analyze data to optimize your BMS for a comfortable, efficient, and thriving building. Remember, targeted monitoring and analysis empowers your BMS to make your building a happy place for all.

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2 Occupant satisfaction

Another key KPI for evaluating BMS impact is the occupant satisfaction, which measures how happy and comfortable the people are with the indoor environment and the services provided by the BMS. Occupant satisfaction can be assessed by using surveys, feedback forms, or online platforms that allow the users to rate and comment on various aspects of the building, such as temperature, humidity, air quality, noise, lighting, and cleanliness. By collecting and analyzing this data, you can identify the areas of improvement and the best practices for enhancing the occupant experience and loyalty.

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3 Indoor environmental quality

Indoor environmental quality (IEQ) is a comprehensive metric that encompasses the physical and psychological factors that affect the health, comfort, and performance of the occupants. IEQ includes parameters such as temperature, humidity, air quality, noise, lighting, and biophilic design. By using sensors, meters, and analytics, you can monitor and optimize these parameters to create a comfortable and stimulating indoor environment that supports the well-being and productivity of your occupants. For example, you can use CO2 sensors to detect the level of ventilation and fresh air in your space, and adjust your BMS accordingly to prevent the accumulation of pollutants and pathogens that can cause health issues and reduce cognitive function.

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Andrew Brooks

Managing Director at The HVAC Consultants Ltd
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VOC - Volatile Organic Components are worth measuring. CO2 is great for occupancy, but as we are discussing comfort, we should consider odours. A gym locker room could have very low occupancy and, as a result, have a low CO2 level, but it could be an unpleasant environment to be in due to odours. Measuring VOC and linking the measured value to ventilation as well as CO2 will not only deliver a more comfortable environment but also save energy. Many areas are occasionally affected by unpleasant or intense odours; simply run the ventilation rates at maximum all the time to try and avoid this situation. Measuring VOC and CO2 to both detect odours and occupancy, allows you to only run maximum ventilation when required.

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4 Energy efficiency

Energy efficiency is a crucial metric for evaluating BMS impact, as it measures how much energy is consumed by the building and its systems per unit of output or service. By using smart meters, submeters, and dashboards, you can track and analyze the energy consumption and performance of your BMS, and identify the opportunities and strategies for reducing your energy waste and carbon footprint. For example, you can use occupancy sensors and daylight sensors to control the lighting levels and minimize the unnecessary use of artificial lighting, or use variable frequency drives and demand-controlled ventilation to regulate the speed and output of your fans and pumps according to the actual load and occupancy.

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5 Maintenance efficiency

Maintenance efficiency is another important metric for evaluating BMS impact, as it measures how well your BMS is preventing and resolving the issues and faults that can affect the performance and reliability of your building and its systems. By using predictive maintenance, fault detection and diagnosis, and remote control features, you can optimize your maintenance operations and reduce your downtime and costs. For example, you can use your BMS to monitor the condition and performance of your equipment and systems, and receive alerts and recommendations when they need service or repair, or use your BMS to remotely troubleshoot and fix minor issues without sending technicians on site.

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6 Return on investment

Return on investment (ROI) is the ultimate metric for evaluating BMS impact, as it measures the financial benefits and costs of your BMS over its lifetime. By calculating your ROI, you can assess how your BMS is improving your operational efficiency, occupant satisfaction, energy savings, maintenance savings, and asset value, and compare them with your initial and ongoing investment in your BMS. To calculate your ROI, you need to estimate your annual savings and benefits from your BMS, and divide them by your total investment in your BMS, including the installation, commissioning, operation, maintenance, and upgrade costs.

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Porter Daniels

BMS Engineer
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Building technicians can assist in the design and construction of buildings by implementing best practices for energy efficiency, water conservation, waste management, and indoor air quality. Additionally, they can conduct regular audits of building systems and operations to identify areas for improvement and ensure compliance with BREEAM requirements. Building technicians can also help building managers to track and report on sustainability performance metrics, such as energy consumption and carbon emissions, to demonstrate compliance with BREEAM certification standards. By applying the principles of BREEAM certification and can help to create healthier, more sustainable buildings that benefit both the environment and occupants.

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7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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What are the key performance indicators and metrics for evaluating BMS impact on occupancy and comfort?

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1 Occupancy rate

2 Occupant satisfaction

3 Indoor environmental quality

4 Energy efficiency

5 Maintenance efficiency

6 Return on investment

7 Here’s what else to consider

Building Management Systems

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