Most supply chain improvement efforts begin with a simple idea: find the constraint, fix it, and performance will improve. For a long time, that thinking held up. In more stable environments, bottlenecks tended to sit in one place, and once identified, they could be addressed systematically.
That is no longer the reality for many organisations.
Today, the constraint often refuses to stay still. It shifts across the supply chain, moving from suppliers to production, from production to logistics, and often into demand itself. These "floating bottlenecks" create operational pressure, and they fundamentally change how supply chains need to think, plan, and respond.
The challenge is no longer just about capacity. It is as much about visibility, speed, and the ability to make joined-up decisions as the problem moves. The organisations that succeed are not those with the most robust plans on paper - they are those that can adapt their plans quickly and confidently in practice.
The Constraint Has Started to Move
Modern supply chains operate in an environment defined by volatility. Demand patterns shift more frequently, supplier performance is less predictable, and disruptions, whether operational, geopolitical, or logistical, are now part of the everyday landscape.
In that setting, the idea of a single, stable constraint begins to break down. Instead, what many organisations experience is a pattern where the limitation on performance moves from one point in the system to another.
One week the issue sits with a late supplier or a quality hold. The next, it emerges as a capacity restriction on a production line. Soon after, it shifts again into transport constraints or a sudden spike in demand. Each of these issues is manageable in isolation, but together they create a moving target that is far harder to control.
This is what we mean by a floating bottleneck. The constraint is not fixed. It reveals itself wherever the system is least able to absorb change at that moment in time.
Why This Becomes So Difficult to Manage
Floating bottlenecks rarely present themselves clearly. They tend to appear through symptoms that, at first glance, feel disconnected - especially in heavily siloed organisations.
Inventory levels creep up, yet service fails to improve. Expediting becomes more frequent and gradually more normalised. Plans are revisited so often that execution struggles to keep up. Meetings grow longer, not driven by more decisions to make, but because more time is spent trying to reconcile different versions of the truth that each silo holds.
These symptoms are easy to treat individually, and addressing them in isolation misses the underlying pattern. What is actually happening is that the organisation is reacting to the constraint too late, or too slowly, as it shifts across the system from silo to silo.
The result is a supply chain that is constantly working hard and rarely working in sync.
The Problem Isn't Just More Capacity or Better Forecasts
When performance drops, the instinct is to look for structural fixes. Do we need more capacity? Should we hold more stock? Is the forecast the issue?
Sometimes those factors do play a role. In many cases though, the root cause runs deeper. What we typically see is a combination of fragmented visibility, disconnected decision-making, and planning cycles that are simply too slow for the level of volatility being experienced.
Different functions operate with different data, different priorities, and different timelines. By the time a problem is fully understood, the constraint has often moved on. Effort is applied, but not always in the place where it will have the greatest impact.
Put simply, the supply chain is not lacking effort. It is lacking alignment and speed.
A Shift in Mindset: From Fixing to Responding
If the constraint no longer sits still, then the objective needs to change.
The focus cannot be on eliminating bottlenecks entirely. That is unrealistic in a dynamic system. Instead, the goal becomes the ability to detect where the constraint is emerging, understand it quickly, and respond in a coordinated way before it drives cost or service impact.
This requires a shift in mindset. Planning is no longer about creating a perfect, stable plan and executing against it. It is about maintaining a plan that can adapt as reality changes.
The most effective organisations prioritise three capabilities. First, they establish a clear, shared view of what is happening across the supply chain, reducing the time spent debating data. Second, they develop the ability to assess options quickly, often through structured scenario thinking. And third, they align their teams so that decisions are made collectively, with an end-to-end understanding of the trade-offs involved.
In this context, speed and alignment become more valuable than perfection.
Why Many Organisations Get Stuck
Most organisations already have many of the ingredients required to operate in this way. They have planning systems, structured processes, and regular forums for decision-making. Yet progress often stalls.
The issue is not the absence of tools - it is more likely how those tools are used, and how decisions are made around them. Data fragmentation slows down alignment. Decision rights are unclear, leading to hesitation or rework. End-to-end trade-offs are not made explicit, so functions default to protecting their own metrics under pressure.
The consequence is that by the time a decision is agreed, the window to act early has already passed. The organisation ends up reacting rather than shaping outcomes.
Starting with Clarity: The Role of Diagnostics
Before introducing new systems or redesigning processes, there is a more fundamental question to answer: where is the constraint actually sitting, and how is it moving?
At Grange, we start here. Using the GrangeWay™ approach, the initial focus is on building a clear and shared understanding of the supply chain as it currently operates. This is not about producing more data for the sake of it. It is about creating insight that is practical and actionable.
That means identifying where constraints genuinely occur today, understanding what causes them to shift, and exposing where decision-making slows down or breaks down. It also means quantifying the impact on service, cost, and operational stability so that the organisation can focus on what matters most.
Without this level of clarity, there is a real risk that solutions address symptoms rather than causes. With it, teams can move forward with confidence, knowing they are solving the right problems.
Enabling a Faster, More Connected Response
Once the supply chain has a clearer view of its constraints, the focus shifts to improving how it responds.
This often involves rethinking planning and decision-making rhythms, making them shorter and more responsive. It requires clearer ownership of decisions, so that trade-offs can be made quickly and consistently. And it demands stronger connections between functions, ensuring that demand, supply, and logistics are aligned around a shared end-to-end objective.
Technology can play an important role in this phase. Platforms such as Kinaxis Maestro enable organisations to bring together data from across the supply chain, explore different scenarios rapidly, and understand the implications of decisions before committing to them.
Advanced planning technology works best when it supports a way of working that is already aligned. Without that foundation, even the most capable tools risk reinforcing existing inefficiencies rather than removing them.
What Changes When It Works
When organisations successfully adapt to managing floating bottlenecks, the shift is noticeable. Performance improves and so does the day-to-day experience of the teams involved.
Surprises become less frequent. Plans become more stable, even in the face of volatility. The need for expediting reduces. The issues do not disappear - they are addressed earlier. Inventory is held more deliberately, rather than as a buffer against uncertainty.
Perhaps most importantly, the tone of the organisation changes. Less time is spent firefighting, and more time is spent anticipating and shaping outcomes - what Grange calls fire prevention activities. The supply chain becomes more controlled, even though the environment remains unpredictable.
The constraint is still there. It still moves. The difference is that it no longer dictates performance in the same way.
The Grange Perspective
Floating bottlenecks are not a sign that the supply chain is failing. They are a reflection of how complex and dynamic it has become. The organisations that perform best are not those that eliminate constraints entirely - they are the ones that can see them emerging, understand them quickly, and respond with clarity and confidence.
At Grange, we help organisations unlock supply chain value through smarter planning, stronger capability, and behaviour change that sticks. Through the GrangeWay™ we work with teams to turn insight into action, and action into sustained performance.