Supriya Foster Cluster Manager – Mineral Processing | South West College
The manufacturing sector has spent decades pursuing efficiency. From reducing defects and streamlining production flows to eliminating unnecessary movement and excess inventory, Lean Manufacturing has become one of the most effective frameworks for driving operational excellence. Its success is built on a simple principle: before waste can be reduced, it must first be identified and measured.
Yet when it comes to carbon emissions, many organisations continue to take a different approach. Net-zero targets are announced, sustainability commitments are published, and carbon reduction plans are developed. But in many cases, businesses are still working to establish a clear understanding of where emissions are actually being generated. It’s a curious contradiction.
Manufacturers would never launch a Lean improvement programme without first understanding where inefficiencies exist within their operations. The same discipline should apply to carbon reduction.
Because if emissions are simply another form of waste, why are we treating them differently?
Lean and Sustainability Are More Closely Connected Than Many Realise
For years, Lean Manufacturing has been associated with productivity, quality, and cost reduction. Sustainability, meanwhile, has often been viewed as a separate conversation, driven by environmental targets, reporting requirements, and ESG commitments. In reality, the two are closely linked.
At its core, Lean focuses on eliminating activities that consume resources without creating value. Overproduction, waiting time, unnecessary transport, excess inventory, over-processing, defects, and unnecessary movement all represent forms of waste that impact operational performance. What is often overlooked is that every one of these inefficiencies also carries an environmental cost.
Overproduction requires additional raw materials and energy. Excess transportation increases fuel consumption and associated emissions. Defects generate scrap and rework, consuming further resources. Inventory requires storage space, heating, lighting, and handling.
Long before sustainability became a strategic priority, manufacturers implementing Lean principles were already reducing resource consumption as a by-product of improving operational efficiency. The U.S. Environmental Protection Agency has long recognised that Lean initiatives frequently deliver environmental benefits alongside productivity improvements. By reducing waste and improving process efficiency, organisations often lower material use, energy consumption, and emissions without explicitly setting out to do so.
This is why the relationship between Lean and sustainability should not be viewed as coincidental. Both disciplines are fundamentally focused on identifying waste and improving performance. The difference is that one measures operational inefficiencies, while the other measures environmental impact.
Why Carbon Baselining Matters
Just as Lean Manufacturing relies on data to identify opportunities for improvement, carbon reduction depends on understanding where emissions are generated.This is where carbon baselining becomes essential.
A carbon baseline provides a snapshot of an organisation’s greenhouse gas emissions over a defined period, typically one year. It establishes a reference point against which future improvements can be measured and verified. Without that starting point, organisations face a significant challenge.
How do you prioritise reduction efforts if you don’t know where emissions are concentrated?
How do you evaluate investment decisions?
How do you demonstrate progress to customers, investors, regulators, or stakeholders?
The reality is that a net-zero strategy without a baseline offers little practical value. Recent guidance from the Government Digital Sustainability Alliance (GDSA) highlighted this issue directly, noting that organisations cannot effectively track progress, evaluate decisions, or demonstrate outcomes without first understanding their starting position.For manufacturers, this visibility is becoming increasingly important.
Customers are requesting emissions data from suppliers. Procurement processes increasingly include environmental criteria. Investors are paying closer attention to sustainability performance. At the same time, regulatory expectations continue to evolve as governments work towards ambitious climate targets.
In this environment, carbon baselining is no longer simply a reporting exercise. It is becoming a business necessity.
The Challenge of Scope 3 Emissions
While Scope 1 and Scope 2 emissions are generally easier to measure, the biggest challenge for many manufacturers lies within Scope 3 emissions. These include indirect emissions generated throughout the value chain, such as purchased materials, transportation, logistics, supplier activities, waste management, and outsourced services. For many organisations, Scope 3 emissions account for the largest proportion of their overall carbon footprint.
This complexity can be intimidating.
Data may be fragmented across departments and suppliers. Some information may not be readily available. Calculations often involve estimates and assumptions, particularly during the early stages of measurement. As a result, some organisations delay action while waiting for perfect data. But that approach carries its own risks.
The GDSA’s guidance makes an important point: progress is more valuable than perfection. Organisations can begin with available information, industry averages, and standard emissions factors before improving accuracy over time. This should sound familiar to anyone with experience in Lean Manufacturing.
Continuous improvement has never been about achieving perfection on day one. It is about establishing a baseline, understanding the current state, and improving incrementally over time. Carbon measurement should be approached in exactly the same way.
Why Some Organisations Still Hesitate
Despite increasing pressure to reduce emissions, many manufacturers remain hesitant to establish a carbon baseline.
The reasons are understandable. Time and resources are limited. Data can be difficult to gather. Responsibility often sits across multiple teams. Some organisations worry that measuring emissions will reveal a larger challenge than anticipated. Yet these concerns mirror many of the objections that organisations once raised about Lean programmes themselves.
Too complex. Too time-consuming. Too difficult to measure.
The reality is that delaying measurement rarely makes the challenge easier. In fact, the longer organisations wait, the more difficult it becomes to establish a meaningful baseline, identify opportunities, and demonstrate progress against future targets.
The most successful manufacturers recognise that visibility creates opportunity.
You cannot improve what you cannot see.
A New Definition of Manufacturing Excellence
For years, operational excellence and sustainability have often been treated as separate priorities. One belongs to operations. The other belongs to sustainability teams. That distinction is becoming increasingly outdated.
Manufacturers are beginning to recognise that environmental performance and operational performance are fundamentally connected. Both rely on measurement. Both require visibility. Both depend on continuous improvement. Lean Manufacturing transformed the way organisations think about waste. Carbon baselining has the potential to do the same for emissions.
As businesses navigate rising customer expectations, evolving regulations, and increasing pressure to reduce environmental impact, those that integrate carbon measurement into existing Lean and continuous improvement frameworks will be better positioned to compete. The future of manufacturing excellence is not about choosing between efficiency and sustainability.
It is about recognising that both are pursuing the same objective: achieving more value with fewer resources. Because in the end, emissions are simply another form of waste—and every Lean practitioner knows that waste cannot be reduced until it is measured.
