The drive towards operational efficiency has, for two decades, encouraged European organisations to consolidate their supplier bases. Fewer suppliers meant simpler contracts, reduced management overhead, and often, negotiated volume discounts. Yet this seemingly rational approach has created a structural vulnerability that the pandemic exposed and geopolitical tensions continue to reinforce. Today, many procurement teams find themselves managing supply chains that are simultaneously cost-optimised and fragile, a tension that deserves a serious examination.
The Consolidation Trap and Its Origins
The trend towards supplier consolidation is not accidental, as it emerged from a legitimate business logic. In the 1990s and 2000s, procurement functions across the UK, Ireland, and continental Europe adopted principles derived from lean manufacturing and category management theory. The philosophy was straightforward: deep partnerships with carefully vetted suppliers would yield better quality, more innovation, and stronger cost control than maintaining redundancy.
This approach worked for a time and organisations achieved measurable savings. Inventory turnover improved, and supply chain visibility, within a single-supplier relationship, deepened. But the model contained an unexamined assumption: that the suppliers themselves would remain stable and that the operating environment would remain predictable. The COVID-19 pandemic shattered both assumptions simultaneously. Organisations that had eliminated second-source arrangements discovered, often too late, that they could not simply switch suppliers mid-crisis. Semiconductor manufacturers, pharmaceutical raw material producers, and logistics providers faced demand shocks that their contracted suppliers could not absorb. The result was production stoppages and the revelation that “efficiency” and “resilience” had become opposing forces rather than complementary ones.
What makes this realisation particularly significant is that it was largely avoidable, the data on supply chain disruption had been accumulating. Yet many organisations lacked the analytical capability, or perhaps the institutional will, to translate that data into structural change.
Measuring Concentration: Beyond Intuition
One obstacle to addressing concentration risk is that it remains difficult to quantify in operational terms. Unlike cost variance or delivery performance, which procurement systems can track automatically, supplier concentration is often measured through proxies: the percentage of spend with top three suppliers, the number of single-source categories, or the geographic distribution of key suppliers.
These metrics are useful but incomplete, an organisation might discover that 60% of its spend in a given category flows to three suppliers, an apparently alarming figure, only to find that these three supply critical but low-risk commodities (stationery, for instance), whilst higher-value, truly strategic inputs are more diversified. Conversely, an organisation might pride itself on a well-distributed supplier base whilst remaining entirely dependent on a single logistics provider or a single upstream manufacturer of critical components.
More sophisticated approaches now emerging in procurement circles attempt to layer multiple dimensions onto concentration analysis: the strategic importance of each category, the availability of alternative suppliers, the financial health of key vendors, geographic or geopolitical risk, and the lead time required to qualify alternatives. This multi-factor analysis is more laborious but substantially more useful. It allows organisations to distinguish between concentration that represents genuine risk and concentration that represents rational economics.
Various procurement organisations across Europe have begun publishing frameworks for this kind of analysis. What they reveal is that concentration risk is often invisible within conventional spending analytics, and it requires deliberate, cross-functional inquiry to surface.
The Economics of Diversification: The Hard Questions
Once concentration risk is visible, organisations face a genuinely difficult choice: diversifying a supplier base is not costless and qualifying alternative suppliers demands investment in audit, technical assessment, and often small initial orders at unfavourable terms. Setting up multiple suppliers for categories where economies of scale are substantial can increase unit costs by 10-20%, sometimes more.
For procurement teams operating under cost-reduction mandates, this is not an abstract problem but a direct conflict between two legitimate objectives: lower cost and supply security. This tension is rarely resolved through technical analysis alone, it requires business judgment and a strategic choice. It may also mean that strategies change from multi-sourcing to single-sourcing depending on macro-economic and geopolitical conditions. Strategic flexibility to move between these kind of strategies is a feature of high performing procurement functions.
By way of example, some organisations have attempted a middle path: maintaining single-source arrangements for low-risk, readily available commodities while establishing qualified secondary suppliers for critical, hard-to-substitute inputs. This approach is intellectually sound but operationally complex. It requires procurement teams to maintain supplier relationships that generate no volume, a practice that many suppliers view as inefficient. Secondary suppliers have little incentive to remain engaged if they receive minimal orders.
Others have pursued “near-shoring” or “friend-shoring” strategies, moving away from single offshore suppliers toward multiple, geographically closer alternatives. This has proven effective in some sectors (automotive, advanced manufacturing) but carries its own costs and logistical complications. The analytical challenge is that each category presents its own risk profile and cost trade-off curve. There is no universal answer. Organisations that attempt to impose a blanket “no single-source” policy often discover that the cost implications are unsustainable. Those that do nothing may discover, as many did in 2021-2022, that the cost of a supply disruption far exceeds the cost of diversification.
Emerging Practice and Realistic Pathways
Forward-thinking organisations are beginning to segment this problem differently. Rather than viewing supplier consolidation as a simple binary, either we maintain redundancy or we don’t, they are adopting layered approaches:
Strategic segmentation: Classifying suppliers by the impact of their failure and the availability of alternatives, then tailoring concentration risk tolerance accordingly.
Pre-approved supplier lists: Maintaining updated lists of pre-qualified alternative suppliers even if they are not in active supply, reducing the time and cost of switching if required.
Supplier financial monitoring: Using third-party data on supplier financial health and supply chain capacity to identify emerging vulnerabilities before they become operational failures.
Cross-functional risk ownership: Moving concentration risk from a procurement function decision into genuine business strategy, where trade-offs between cost and resilience are made transparently across the organisation.
Contractual flexibility: Negotiating terms that allow for volume flexibility or tiered supplier arrangements, reducing the cost of maintaining multiple suppliers.
None of these approaches is novel in isolation but organisations that combine them systematically report both improved resilience and more stable costs than those attempting to address concentration risk through intermittent efforts..
Supply chain concentration will always be a risk management issue for European organisations, particularly those with globalised sourcing bases or dependence on specialised suppliers. However, the solution is not to abandon the efficiency gains that consolidation has provided. But to make concentration decisions deliberately and with explicit acknowledgment of the trade-offs involved.
The organisations that will navigate the next decade most successfully are likely to be those that move past the false choice between “single-source and cheap” or “multiple sources and expensive,” instead developing segmented strategies that apply appropriate risk management to different parts of their supply base. For procurement practitioners, this represents both a challenge and an opportunity to position the function as genuinely strategic: as a discipline capable of balancing competing organisational objectives under uncertain conditions. It is also, increasingly, what the business actually needs.
Background Reading and Additional Sources:
National Institute of Economic and Social Research (NIESR) – Supply Chain Resilience and UK Economic Recovery (2022) https://www.niesr.ac.uk/
UK Parliament Office of Science and Technology – Resilience of UK Supply Chains (2022) https://www.parliament.uk/commons-library/
European Commission, Directorate-General for Internal Market, Industry, Entrepreneurship and SMEs – Strategic Dependencies and Capacities (2021) https://ec.europa.eu/growth/
Chartered Institute of Procurement & Supply (CIPS) – Supply Chain Resilience Standards and Guidance https://www.cips.org/
Institute for Supply Management (ISM Europe) – Supplier Concentration and Risk Management Practices https://www.ismeurope.org/
Oxford Review of Economic Policy – Supply Chain Concentration and Economic Resilience (2023) https://academic.oup.com/oxrep/
International Organisation for Standardisation (ISO) – ISO 31000: Risk Management – Guidelines https://www.iso.org/
