What Should Supply Chain Due Diligence Cover in a Merger or Acquisition?

Duplicate logistics spend, sole-source supplier dependencies, incompatible inventory systems, and undisclosed compliance failures all surface after signing. At Smukeliso, we have led supply chain due diligence on three large commercial transactions in the past three years. The same gaps appear every time. This article covers what a thorough supply chain DD scope looks like and why investors should insist on it.

Why Is Supply Chain Due Diligence Overlooked in M&A?

Traditionally, M&A due diligence scopes focused on financial performance, legal exposure, and technical operations. Supply chain sat in the background — assumed to be a back-office function that integration teams would sort out later.

That assumption is expensive. Supply chains govern how a business delivers value to its customers. They control cost, quality, continuity, and compliance. A target that looks clean on a balance sheet can carry hidden supply risk, bloated logistics spend, or legacy systems that block integration for years. Discovering these after close means inheriting the problem without the leverage to reprice the deal.

Inorganic growth — acquiring to enter new markets or add new capabilities only works if the acquired business can operate and scale within your value chain. Supply chain due diligence is how you verify that before committing.

What Is Supply Chain Management and Why Does It Matter in M&A?

Supply chain management (SCM) is the process of planning, implementing, and controlling supply chain operations to satisfy customer requirements as efficiently as possible. It covers the movement and storage of raw materials, work-in-process inventory, and finished goods — from point of origin to point of consumption.

At Smukeliso, we differentiate between three types of supply chains, because the DD scope shifts depending on the target's business model:

Product Manufacturing Supply Chains — focused on physical production efficiency, raw materials sourcing, planning and forecasting, and capital equipment. Examples: mining, automotive, FMCG.

Service Supply Chains — little or no physical inputs. The focus is technology enablement, process efficiency, and customer experience. Examples: insurance, banking, professional services.

Distribution Supply Chains — the business sources, stores, and sells. No manufacturing involvement. The key drivers are inventory and warehouse management, inbound logistics, and last-mile distribution.

Understanding which type of supply chain you are acquiring determines what you scrutinise most closely in the DD.

What Are the Seven Core Areas of Supply Chain Due Diligence?

1. How Exposed Is the Target's Supply Base?

The first question is dependency. Does the target rely on a single supplier for a critical raw material or core product? Sole-source dependency is a risk most buyers inherit without knowing it.

Supply chain DD maps the full supply base — not just tier-one suppliers, but their suppliers too. This visibility matters when geo-political or economic disruption blocks access to core inputs. An acquisition that diversifies your product range creates no value if the product becomes unavailable in three to five years. At Smukeliso, we assess both current supply risk and the target's "Plan B" strategy for direct spend categories.

2. Where Are the Cost Synergy Opportunities?

Every acquisition involves shared spend categories — goods and services both companies buy. Without a supply chain DD, those overlaps stay invisible until post-integration, by which point the cost is already duplicated.

In one transaction Smukeliso supported, the acquiring company discovered after close that two separate fleets were delivering parts to the same customers daily. Two logistics contracts, two route networks, two invoices — for one customer base. A supply chain DD would have surfaced that overlap during negotiation, enabling a cost-reduction plan before integration began. The DD should map spend categories, logistics suppliers, and routes — and model the synergy opportunity at deal stage.

3. Are There Conflicting Supplier or Customer Contracts?

When the acquirer and target operate in the same industry, they often share suppliers and customers. That overlap creates risk that most financial and legal DDs miss.

Duplicate supplier contracts with conflicting terms and conditions create payment misalignment and negotiating weakness. Shared customers served under different service agreements create inconsistency and reputational exposure. A supply chain DD identifies these conflicts early — enabling a unified supplier engagement strategy before integration, not after it.

4. What Does the Logistics and Inventory Model Look Like?

For most businesses, inventory has a direct impact on production continuity and uptime. A wrong critical spare, an incorrect stocking level, or a delayed replenishment can trigger significant revenue loss. One error in the chain is all it takes.

The supply chain DD investigates the target's inventory management model, the systems in use, and the financial impact of past inventory control failures. It also assesses the logistics model — how goods move, who manages warehousing, and what the last-mile distribution infrastructure looks like. For distribution supply chains in particular, this is the core of the business. It deserves the same scrutiny as the P&L.

5. Are the Procurement Systems Compatible?

Legacy systems are one of the most underestimated risks in M&A integration. A target may run its entire procurement and supply chain on an over-customised ERP that cannot be decommissioned without significant cost and disruption.

Supply chain DD assesses the technology stack — IT infrastructure, system types, levels of customisation, and integration complexity. The goal is to identify both synergy opportunities and blockers. A system that saves the target money today can become a multi-year integration liability post-close if not identified early. At Smukeliso, we include technology compatibility in every supply chain DD scope.

6. Is the Supply Chain Organisation Fit for Integration?

The supply chain function is only as good as the people and structure behind it. Organisation structure DD looks at current roles and responsibilities, skills and talent allocation, and whether the supply chain team can deliver on the combined business's value chain post-integration.

This assessment answers two practical questions: where do you place the talent during integration, and is the talent worth keeping? Both questions are easier to answer before the deal closes than after. The DD should also clarify the operating model that makes sense for the combined entity — centralised, decentralised, or hybrid — and identify the gaps between where the target sits today and where it needs to be.

7. What Are the Compliance and ESG Risks?

Supply chain compliance failures transfer with the acquisition. This area of the DD assesses the policies in place, regulatory alignment, and any existing non-compliance — including fraud and corruption safeguards.

ESG is no longer a reporting footnote. It is a KPI that investors, regulators, and customers measure. Supply chain compliance DD covers ethical sourcing practices — forced labour, child labour, conflict minerals — alongside supplier due diligence processes, Health and Safety standards, Quality Management systems, and Broad-Based Black Economic Empowerment or Supplier Diversity enforcement. A target that scores poorly here creates regulatory exposure and reputational risk for the acquirer. Identify it during DD, or inherit it at close.

How Does the Scope Expand Based on the Transaction?

The seven areas above form the core supply chain DD scope. In practice, the scope expands or narrows based on three factors:

• Industry — a distribution business warrants deeper inventory and logistics scrutiny than a services firm
• Funder requirements — transactions with major funders increasingly require supply chain DD to include value-creation recommendations, not just risk identification
• Strategic rationale — if the acquisition is designed to add new capabilities, the DD must validate whether the target's supply chain can actually deliver them

At Smukeliso, we run supply chain DD in collaboration with the transaction advisory team — typically alongside the financial and tax DD. The scope is always tailored. The seven areas above are the starting point, not the ceiling.

Frequently Asked Questions

Q: At what stage of an M&A transaction should supply chain due diligence begin? Supply chain DD should run in parallel with financial and legal DD — before exclusivity, if possible. Starting early gives buyers the leverage to reprice, renegotiate, or walk away based on what the DD surfaces. Starting after close means inheriting the risk without any recourse.

Q: Does supply chain due diligence apply to service businesses, not just manufacturers? Yes. Service supply chains carry different risks — technology dependency, talent concentration, customer contract terms, and process fragility — but those risks are just as material to deal value. The DD scope shifts based on the business model, but the need for it does not.

Q: How do you prioritise the seven areas when the DD timeline is compressed? Start with supply risk and cost synergies — these have the highest direct impact on deal value and integration cost. Then move to contracts and compliance, which carry legal and reputational exposure. Logistics, technology, and organisation structure can follow, but should not be deferred past the close date.