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Supply Chain Network Design: When and Why to Redesign

Supply Chain Network Design: When and Why to Redesign
Supply Chain Network Design: When and Why to Redesign
Written by:
Tim Fagan
Three connected circles forming a molecular structure icon on a dark blue background, with two blue circles and one grey circle linked by grey and white lines.
Written by:
Trace Insights
Publish Date:
Mar 2026
Topic Tag:
Strategy & Design

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Supply Chain Network Design: When and Why to Redesign Your Network

Most Australian businesses are running supply chain networks that were designed for a version of the business that no longer exists. The distribution centre footprint was established when the customer base was different. The transport lanes were set up before e-commerce changed the order profile. The inventory positioning was designed when lead times were shorter and supply was more predictable. The outsourcing decisions were made when labour was cheaper and property was more affordable.

Networks don't fail suddenly. They drift — gradually and quietly — out of alignment with the business they are supposed to serve. Costs creep up. Service levels erode at the margins. The planning team invents workarounds that become permanent. Capacity constraints appear in some nodes while others are underutilised. And at some point, the cumulative effect of years of drift becomes visible in the P&L: logistics costs that are too high relative to revenue, service levels that are persistently below target, and a supply chain that is too slow, too expensive, and too fragile to support the business's growth ambitions.

Network design is the discipline of addressing that drift — of asking whether the current network configuration is still the right one, and if not, what it should look like and how to get there. This article explains what supply chain network design involves, what triggers a redesign, how the process works, and what Australian organisations can realistically expect to achieve.

What Supply Chain Network Design Actually Is

Supply chain network design is the process of determining the optimal structure of a supply chain — the number, location, size, and role of facilities, and the flow of goods between them. It addresses questions like:

Where should warehouses, distribution centres, and fulfilment nodes be located to optimise the cost of reaching customers at the required service levels? How many nodes does the network need — is the current footprint the right size, or is it too large (too many facilities, too much fixed cost) or too small (too much freight cost, too slow to serve regional markets)? What role should each facility play — national distribution centre, state hub, cross-dock, regional spoke, returns processing? How should inventory be positioned across the network to minimise total stockholding cost while maintaining availability? What is the right mix of owned, leased, and third-party logistics infrastructure? And how should the network be configured to balance cost, service, resilience, and sustainability — rather than optimising one dimension at the expense of the others?

Network design is distinct from day-to-day logistics management. It operates at a strategic level, informing decisions that take years to implement, cost significant capital to execute, and shape the supply chain's performance for five to ten years or more. Getting it right matters enormously. Getting it wrong — designing a network around assumptions that prove incorrect, or failing to adapt as conditions change — creates cost and service problems that are difficult and expensive to undo.

Why Networks Drift Out of Alignment

Understanding why supply chain networks become suboptimal over time is the starting point for knowing when and why to redesign.

Business growth and geographic expansion. A network designed to serve a business turning over $200M in revenue from three states will not necessarily perform well when the business reaches $500M and is serving all states and New Zealand. Volume growth strains capacity. Geographic expansion stretches transport lanes. Customer concentration shifts. The network that was right at one scale and geography is simply not the right network at a different scale and geography.

Channel mix change. E-commerce has fundamentally altered the order profile for most Australian retail and FMCG businesses — from full-pallet and full-carton orders shipped to store, to individual item picks shipped to residential addresses. The warehouse design, pick process, labour model, and carrier arrangements optimised for the former are typically wrong for the latter. Channel mix shifts create misalignment between the network as designed and the demand it is actually serving.

Mergers and acquisitions. Post-M&A supply chain integration is one of the most common triggers for network redesign. Combining two businesses typically produces a network with duplicate facilities, overlapping territories, incompatible systems, and a total logistics footprint that is larger than required. Capturing the synergies of a merger requires rationalising the combined network — which is a network design exercise.

Cost environment changes. Logistics costs in Australia have changed materially over the past five years — fuel costs, labour costs in warehousing and transport, industrial property rents in the major capital cities, and sea freight rates have all moved significantly. A network design optimised for the cost structure of 2019 may produce a different answer when reoptimised for 2025 costs. The relative economics of different configurations — more nodes closer to customers versus fewer, larger facilities further away — shift as the cost inputs change.

Lease expiry events. A warehouse lease expiry is one of the most reliable triggers for network review in Australia. It creates a natural decision point — renew, relocate, or redesign — and the cost of signing a new long-term lease on an existing facility that is in the wrong location, the wrong size, or the wrong configuration is very high. Lease events should always be preceded by a network review, not followed by one.

Supply chain disruption and resilience concerns. The events of 2020–2022 exposed the fragility of highly centralised, cost-optimised networks. Organisations that operated single distribution centres, single-source supply arrangements, or geographically concentrated production were disproportionately impacted by port congestion, supplier shutdowns, and freight capacity shortages. Many Australian businesses have since been reviewing their networks specifically to build in resilience — through network decentralisation, additional inventory nodes, or alternative transport routes.

Sustainability and emissions targets. Scope 3 emissions disclosure requirements — now mandatory for eligible Australian entities under the ASIC climate-related financial disclosure regime from January 2025 — are making the emissions profile of logistics networks a financial reporting issue, not just a sustainability aspiration. Freight movements are typically the largest component of a business's Scope 3 logistics emissions. Network designs that minimise freight kilometres, optimise modal mix, and reduce empty running are increasingly evaluated against both cost and emissions criteria simultaneously.

When Is the Right Time to Redesign?

The honest answer is that network design should be a continuous discipline — a periodic review of whether the current network configuration remains optimal, not a once-a-decade project triggered by crisis. In practice, most Australian organisations review their networks reactively rather than proactively, which means they tend to redesign in response to visible pain rather than in anticipation of it.

The clearest signals that a network review is overdue are:

Logistics costs are rising faster than revenue. If freight, warehousing, and handling costs are consuming a growing share of revenue — particularly if this is happening while volume is also growing — the network is likely absorbing inefficiency somewhere. This might be too many nodes creating cross-transfer cost, carrier routes that are inefficient relative to customer concentration, or inventory positions that require excessive replenishment movements.

Service levels are persistently below target. When the supply chain is working hard and DIFOT is still below where the business needs it to be, the problem is often structural — the network is not configured to reach customers within the required timeframes — rather than operational. Operational improvements (faster pick, better transport booking) can recover some performance, but they cannot compensate for a network that is fundamentally in the wrong place relative to demand.

Capacity is the binding constraint. When the answer to operational problems is consistently "we don't have enough space" or "we don't have enough throughput capacity," the conversation shifts from operational improvement to strategic investment. That investment decision — where to add capacity, in what form, at what scale — is a network design question.

A major business change is imminent. New customer contracts, geographic expansion, significant M&A activity, channel strategy changes, or major supplier shifts all change the demand or supply parameters the network needs to serve. The right time to review network design is before those changes take effect, not after the consequences are visible.

The network hasn't been reviewed in five or more years. Even in the absence of obvious pain signals, a network that has not been formally reviewed in five years has almost certainly drifted out of optimality. Business conditions, cost structures, customer expectations, and available logistics infrastructure all change over a five-year horizon. A periodic review — even one that concludes the current configuration is broadly correct — provides the evidence base for that conclusion and identifies incremental improvements that may have accumulated.

How a Network Design Process Works

A well-structured network design process follows a logical sequence from diagnostic through to implementation planning. The time and resource investment scales with the complexity of the network and the scope of the decisions being made, but the core structure is consistent.

Step 1: Define the design problem. Before building any models, establish what question the network design is actually trying to answer. Is this a facilities location exercise — where should nodes be? Is it a make vs. buy question — which activities should be insourced versus third-party? Is it a capacity investment decision — how much space, where, and when? The design problem definition also establishes the design constraints: the service level requirements the network must meet, the cost parameters it must operate within, and the capital available for investment.

Step 2: Gather and validate data. Network design modelling is only as good as the data underpinning it. The minimum data requirement is: customer locations and order profiles (volumes, frequencies, parcel sizes), current facility locations, costs and capacities, freight rates and transit times by lane, and inventory holding data by location and SKU category. In practice, assembling this data from multiple source systems — ERP, WMS, TMS, carrier invoices — is often the most time-consuming part of the process. Data quality issues should be surfaced and resolved before modelling begins, not discovered after scenarios have been built.

Step 3: Model the current state. Build a model that replicates the current network accurately enough to be a reliable baseline. Validate it against actual cost and service data. A model that cannot reproduce current-state costs within an acceptable tolerance cannot be trusted to accurately evaluate future-state scenarios.

Step 4: Develop and evaluate scenarios. The network design process is fundamentally a scenario evaluation exercise. Typically three to five design scenarios are developed — ranging from incremental adjustments to the current network to more radical reconfigurations — and each is evaluated against the design criteria: total cost (logistics, inventory, fixed facility costs), service level performance, capital requirement, implementation risk, and resilience. Scenarios should include sensitivity analysis — testing how the results change if key assumptions (demand growth rate, freight costs, property costs) prove incorrect.

Step 5: Develop the recommended design and implementation roadmap. The recommended design is not just the scenario with the lowest modelled cost — it is the scenario that best satisfies the full set of design criteria given the organisation's strategic priorities and risk appetite. The implementation roadmap translates the recommended design into a sequenced set of actions — facility decisions, lease transactions, systems changes, organisational adjustments — with timelines, capital requirements, and dependencies mapped out.

What Good Network Design Delivers

A well-executed network redesign typically delivers improvement across multiple dimensions simultaneously. Logistics cost reduction of 10–20% is achievable in networks that have not been reviewed recently and have accumulated significant structural inefficiency. Service level improvement — measured in DIFOT, lead time to customers, or reliability of delivery windows — is frequently an outcome alongside cost reduction, because a well-positioned network can reach more customers more reliably than one that has drifted out of alignment with the demand it serves.

Working capital reduction is a third benefit that is often underweighted in network design business cases. Repositioning inventory across the network — concentrating safety stock where it provides the most service benefit and eliminating buffer stock held redundantly across multiple nodes — releases working capital that partially or fully offsets the capital cost of network change.

The resilience benefit is harder to quantify but has become more commercially visible since the supply disruptions of recent years. Networks with greater geographic distribution, multiple transport modes, and strategic inventory positioning are less vulnerable to single-point failure than highly centralised networks optimised purely for cost.

The Australian Context: What Makes Network Design Different Here

Australia's geography creates specific network design challenges that don't apply in the same way in more compact markets.

Population concentration on the eastern seaboard — Sydney, Melbourne, Brisbane, and their surrounds account for the majority of retail consumption — means that for many businesses, the core network design question is how to serve the east coast efficiently while still reaching Perth, Adelaide, Darwin, and regional centres at acceptable cost and service levels.

The distances involved in Australian freight are significant by global standards. Sydney to Perth is over 4,000 kilometres by road. Melbourne to Brisbane is 1,750 kilometres. These distances make transport cost a major variable in network design and create genuine trade-offs between the cost of additional nodes (which reduce freight distance but add fixed facility cost) and the cost of long-haul freight from a centralised network.

Industrial property markets in Sydney, Melbourne, and Brisbane have tightened significantly over the past five years, with vacancy rates at historic lows and rents rising sharply in key logistics corridors. Network designs that were cost-optimal when framed in 2018 or 2019 property terms may produce different answers when current market rents are applied — and property market dynamics need to be explicitly modelled in any current network design exercise.

The Australian logistics infrastructure landscape also shapes network design options: the rail freight network offers cost and emissions advantages for high-volume, long-distance freight but with service and flexibility trade-offs that not all supply chains can absorb; the sea freight lanes between east and west coast ports are a viable cost-effective option for non-time-critical product; and last-mile delivery infrastructure in regional and remote Australia remains more constrained and expensive than in metro markets.

Common Network Design Mistakes

Several failure modes appear consistently in Australian network design projects.

Starting with a site, not a strategy. Organisations that begin a network review with "we need a new warehouse in Melbourne" rather than "what does our network need to look like to support our business strategy" tend to make property decisions that aren't properly anchored in logistics economics. Site selection should be the output of a network design process, not the premise of one.

Optimising for cost alone. Networks designed purely to minimise total logistics cost frequently underperform on service and resilience in ways that create costs elsewhere — lost sales, customer chargebacks, expedited freight. The design criteria need to reflect the full commercial picture.

Using last year's demand. Network designs based on current demand profiles rather than projected future demand build a network for the past, not the future. Design horizon should be at least five years, with sensitivity testing across demand growth scenarios.

Underestimating implementation complexity. A network redesign model that produces a compelling answer on paper can be undermined by implementation challenges: lease break costs, equipment relocation, staff impacts, systems cutover risk, and customer service disruption during transition. Implementation planning is part of the design process, not an afterthought.

Not reviewing as conditions change. A network design completed and implemented is not complete. The business continues to change, costs continue to move, and customer requirements continue to evolve. Building in a regular network review cadence — typically every three to five years for most Australian businesses — ensures the network doesn't drift back out of alignment before the next crisis triggers a reactive review.

How Trace Consultants Can Help

At Trace Consultants, network design is one of our core capabilities. We help Australian organisations answer the hard questions about whether their current network is still the right one — and if not, what it should look like and how to get there.

Strategy & Network Design. We lead end-to-end network design projects — from data gathering and current-state modelling through scenario development, evaluation, and implementation roadmap. We bring the modelling rigour and commercial judgement to translate a design that looks right on a map into one that works in practice.

Lease event and facility decision support. When a lease event, capacity constraint, or facility decision is imminent, we help organisations make it strategically rather than reactively — reviewing whether the current configuration remains appropriate before committing to new long-term property obligations.

Post-M&A network integration. We help organisations rationalise combined networks after acquisition — identifying consolidation opportunities, modelling the cost and service impact of different integration configurations, and planning the transition to avoid customer service disruption.

Resilience & Risk Management. For organisations reviewing their networks specifically through a resilience lens, we assess single-point-of-failure risk, model the cost of resilience investments (additional nodes, strategic inventory positions, alternative transport lanes), and develop network configurations that balance cost efficiency with robustness.

Warehousing & Distribution design. Network design determines where facilities should be; warehousing and distribution design determines what those facilities should look like inside — layout, process design, technology, and automation. We work across both levels.

We have worked across FMCG and manufacturing, retail, health and aged care, property and hospitality, and government and defence. The network design methodology is consistent; the sector context — what service levels are required, what cost constraints apply, what regulatory environment operates — shapes the answer.

Explore our Strategy & Network Design capability →

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The Right Starting Point

If you suspect your network has drifted — if costs are high, service is inconsistent, and the supply chain feels more complicated than it should — the right starting point is a structured current-state assessment. A rapid diagnostic that maps the current network, benchmarks costs and service against industry peers, and identifies the primary misalignments between the network as designed and the business as it operates today.

That assessment typically takes four to six weeks. It produces a clear picture of whether a full network redesign is warranted, what the primary design questions are, and what the realistic improvement opportunity looks like. For organisations facing an imminent lease event or capacity decision, it provides the evidence base to make that decision strategically rather than by default.

Networks built for yesterday's business cost more and deliver less than they should. The question is simply how long to leave it before doing something about it.

Explore our Strategy & Network Design capability →

Speak to an expert at Trace →

Ready to turn insight into action?

We help organisations transform ideas into measurable results with strategies that work in the real world. Let’s talk about how we can solve your most complex supply chain challenges.

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