Multiple sourcing: secure procurement, cut supplier risk

Multiple sourcing addresses a central paradox of the procurement function: diversifying supply sources to strengthen resilience without adding weight to supplier management. This article sets out a practical method for segmenting the procurement process by criticality, identifying the categories that need securing as a priority, and absorbing the operational complexity through a multi-brand distributor.

Contents:

• Multiple sourcing, dual sourcing, single sourcing: what's the difference for your procurement?
• Why does single sourcing expose your supply chain to underestimated risks?
• How to identify which procurement categories to secure as a priority?
• The procurement paradox: how to diversify your sources without exploding your supplier panel?
• The Manutan approach: native multiple sourcing to centralise your indirect procurement

Recent supply chain disruptions have turned dependency on a single supplier into a clearly identified strategic risk. Yet increasing the number of suppliers raises an equally real concern: adding weight to governance, complicating processes and diluting negotiating power. This paradox sits at the heart of the trade-offs facing procurement departments today. Neither maximum concentration nor disorderly multiplication offers a satisfactory answer. The solution lies in a structured approach, which this article sets out in detail.

Multiple sourcing, dual sourcing, single sourcing: what's the difference for your procurement?

These three sourcing models form a continuum, from the most concentrated to the most diversified. Understanding them allows you to position your procurement strategy with precision, before even starting a securing process.

Single sourcing: maximum concentration, maximum risk

Single sourcing means giving all the volumes in a category to one supplier. This approach offers some obvious advantages: simplified administration, concentrated volumes and a close supplier relationship. But working with a single supplier exposes the business to total dependency. If that supplier is hit by an incident, continuity of supply is immediately compromised.

Dual sourcing: the first step towards resilience

Dual sourcing means splitting volumes between two qualified suppliers in the same category. What does dual sourcing look like in practice? Operational insurance: if one supplier fails, the other takes over. This model significantly reduces risk exposure while keeping a tight supplier panel.

Multiple sourcing: structured, controlled diversification

Multiple sourcing relies on several qualified suppliers for the same product category. It isn't about multiplying suppliers in a disorderly way, but about a considered segmentation designed to ensure continuity, competitiveness and compliance. Multiple sourcing involves rigorous management of alternative suppliers, qualified upfront to avoid any operational drift.

Why does single sourcing expose your supply chain to underestimated risks?

Dependency on a single supplier isn't just an operational risk. It also creates regulatory and financial vulnerabilities that are frequently underestimated in procurement trade-offs.

Supply disruption, price increases, quality defects: the three concrete risks

The three main categories of risk linked to single sourcing are as follows:

• Supply disruption: any incident at this single supplier instantly interrupts the supply chain;
• Non-negotiable price increases: without a qualified alternative, the balance of power systematically shifts in the supplier's favour;
• Uncompensated quality defects: the lack of an alternative source prevents any rapid switch in the event of non-compliance.

As Ludivine Martinet, Sales Director at Manutan, points out: “Companies face many challenges across many domains, and this is even more true for the procurement function, which has been under significant strain for more than two years, positioned as it is at the heart of the system in a highly pressured environment. We are talking about environmental risks, financial risks, quality risks, and supply chain disruption risks. Your objective is to reduce these risks while ensuring your company remains competitive.”[1]

Supplier dependency and regulatory compliance: a legal risk that's often overlooked

Supplier concentration also raises a growing compliance issue. The EU's CSRD and the Corporate Sustainability Due Diligence Directive require companies to demonstrate due diligence across the entire value chain. In Germany, the Lieferkettensorgfaltspflichtengesetz (Supply Chain Act) came into force back in 2023. Comparable obligations exist in Switzerland under its due diligence ordinance, in Norway through the Transparency Act, and in the UK through the Modern Slavery Act. Relying on a single supplier makes it harder to demonstrate this due diligence and exposes the business to significant legal risk.

How to identify which procurement categories to secure as a priority?

Multiple sourcing isn't relevant across the entire procurement portfolio. A decision grid based on criticality helps allocate diversification efforts where they have the greatest impact, ensuring genuine resilience without spreading resources too thin.

Mapping your procurement: a three-level criticality grid

Inspired by the Kraljic matrix, this segmentation offers three levels to guide category management:

• Critical procurement: high impact on business continuity, multiple sourcing a priority;
• Important procurement: significant quality or volume considerations, dual or multiple sourcing recommended;
• Standard procurement: low impact, broad market, single sourcing acceptable.

Multiple sourcing should be deployed as a priority across the first two levels, where operational performance is directly at stake.

A concrete example: industrial supplies and warehouse equipment, categories that are often under-secured

MRO purchases[2] are a typical example of categories handled through single sourcing by default, simply because not enough time is devoted to securing them. Industrial supplies and warehouse equipment often follow the same pattern. Yet their unavailability can bring a production line to a halt or disrupt an entire site. Bringing these categories into multiple suppliers strategic sourcing helps secure operations without adding weight to the supplier panel.

The procurement paradox: how to diversify your sources without exploding your supplier panel?

Working with multiple suppliers is often seen as synonymous with administrative complexity. In reality, the operational workload of multiple sourcing is mainly front-loaded, and methodological levers make it possible to keep it under control effectively.

Setting a target number of alternative suppliers per category: the 70/30 rule

The 70/30 rule is one of the most structuring approaches for deploying multiple sourcing. It involves giving 70% of volumes to the main supplier and 30% to qualified alternative suppliers. This ratio preserves the main relationship and negotiating power while testing alternatives without operational risk. It's adjustable: the more critical the category, the larger the alternative share can be.

Pre-qualified alternative suppliers and framework agreements: the levers of controlled diversification

The complexity of multiple sourcing is mainly concentrated in the qualification phase. Once alternative suppliers have been validated and framework agreements signed, the day-to-day supplier management workload stays marginal. Initial qualification is decisive: it ensures that switching to an alternative supplier doesn't lead to any drop in quality. This upfront rigour is also a driver of innovation: working with several suppliers exposes the business to different approaches and technologies.

KPIs to track: supplier dependency rate, alternative coverage rate, switch-over time

Three indicators help manage the performance of multiple sourcing:

• Supplier dependency rate: the share of volume given to a single supplier per procurement category;
• Alternative coverage rate: the share of critical categories with at least one qualified alternative supplier;
• Switch-over time: the estimated time needed to transfer volumes to an alternative source in the event of an incident.

The Manutan approach: native multiple sourcing to centralise your indirect procurement

There's a way to benefit from multiple sourcing without multiplying the number of suppliers you have to manage directly. For indirect procurement, a multi-brand distributor centralises diversification at catalogue level, freeing up procurement teams to focus on their core business.

60 years of supplier relationships: privileged access to a broad, reliable offering

For over 60 years, Manutan has been building in-depth supplier relationships across many categories: industrial supplies, warehouse equipment, MRO, and professional furniture. This long-standing work has resulted in a multi-brand catalogue where sources are already qualified. Procurement teams therefore have validated alternatives for every product category, without having to run the qualification process themselves. This is one of the defining features of our offering.

Multi-brand catalogue and centralised invoicing: the complexity of multiple sourcing absorbed by the platform

Manutan's e-procurement[3] platform centralises orders and invoicing, whatever brand or category is selected. This means procurement departments can benefit from genuinely diversified sources without multiplying points of contact or account reconciliation processes. Management of indirect procurement is simplified as a result, while retaining the traceability needed to track supplier performance.

E-procurement integration: absorbing multiple sourcing complexity

Manutan handles ERP and e-procurement integrations to centralise multi-brand orders through a single point of contact. Fast connection, dedicated training and support enable procurement teams to manage their indirect procurement without adding weight to internal processes. Available in Belgium, the Czech Republic, Denmark, Sweden, Finland, France, Germany, Hungary, Italy, the Netherlands, Norway, Poland, Slovakia, Spain, Switzerland, the UK and Portugal, at the time of publication.