Supply Chain Management & Procurement

Every business relies on suppliers to provide the raw materials, components, and services needed to operate. Managing the supply chain effectively is essential for controlling costs, maintaining quality, and meeting customer demand.

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What Is a Supply Chain?

A supply chain is the network of businesses, resources, and activities involved in producing and delivering a product from raw materials to the final consumer.

graph LR
    A[Raw Material Supplier] --> B[Component Manufacturer]
    B --> C[Product Manufacturer]
    C --> D[Distributor / Wholesaler]
    D --> E[Retailer]
    E --> F[Consumer]

Term	Definition
Supply chain	The entire network of businesses involved in producing and delivering a product
Procurement	The process of finding, buying, and receiving goods and services from suppliers
Supplier	A business that provides raw materials, components, or services to another business
Logistics	The planning and management of the movement and storage of goods
Just-in-Time (JIT)	A stock management system where materials are delivered only when needed
Just-in-Case (JIC)	A stock management system where extra stock is held as a buffer

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Procurement

Procurement is the process of selecting suppliers, negotiating contracts, and purchasing the goods and services a business needs.

Factors When Choosing Suppliers

Factor	Why It Matters
Price	Lower costs increase profit margins; but cheapest is not always best
Quality	Poor quality materials lead to poor quality products and customer complaints
Reliability	Deliveries must arrive on time and in full to avoid production delays
Flexibility	Can the supplier adapt to changing order sizes or specifications?
Location	Local suppliers may offer faster delivery; overseas suppliers may be cheaper
Ethical standards	Customers and stakeholders expect suppliers to treat workers fairly and operate sustainably

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Stock Management

Just-in-Time (JIT)

JIT is a stock management system where materials and components are delivered from suppliers only when they are needed in the production process. No stock is held in advance.

Advantages	Disadvantages
Reduces storage (warehousing) costs	Very dependent on reliable suppliers
Less capital tied up in stock	No buffer stock — any supply disruption halts production
Reduces waste from unsold or expired stock	May miss out on bulk-buying discounts
Forces close relationships with suppliers	Requires accurate demand forecasting

Just-in-Case (JIC)

JIC is a traditional stock management system where the business holds buffer stock (extra stock) to ensure it can always meet demand, even if there are supply disruptions.

Advantages	Disadvantages
Buffer stock protects against supply delays	Higher storage and warehousing costs
Can meet unexpected increases in demand	Risk of waste if stock expires or becomes obsolete
Can benefit from bulk-buying discounts	More capital tied up in stock
Less dependent on individual suppliers	May lead to overproduction

Example: Toyota (JIT)

Toyota pioneered JIT manufacturing as part of its Toyota Production System. Components are delivered to the factory within hours of being needed on the assembly line. This minimises waste and storage costs but requires extremely reliable suppliers and logistics.

Exam Tip: If asked to compare JIT and JIC, consider the nature of the product, the reliability of suppliers, the cost of storage, and the consequences of running out of stock. JIT is riskier but leaner; JIC is safer but more expensive.

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Effective Supply Chain Management

Good supply chain management aims to:

1. Reduce costs — negotiate better prices, minimise waste, reduce storage costs.
2. Improve quality — work with reliable suppliers who meet quality standards.
3. Increase speed — get products to market faster.
4. Improve flexibility — respond quickly to changes in demand.
5. Enhance sustainability — reduce environmental impact throughout the supply chain.

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Summary

• A supply chain is the network of businesses involved in producing and delivering a product.
• Procurement involves selecting suppliers based on price, quality, reliability, flexibility, and ethics.
• JIT minimises stock and waste but depends on reliable suppliers.
• JIC holds buffer stock for security but increases storage costs.
• Effective supply chain management reduces costs, improves quality, and increases responsiveness.

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UK Case Study: Nissan Sunderland's Just-in-Time Supply Chain

The Nissan Sunderland Plant, opened in 1986 on a former airfield in Washington, Tyne and Wear, is the UK's largest car factory and one of the most productive car plants in Europe. It produces around 300,000 vehicles a year — the Qashqai, Juke, and Leaf — and employs roughly 6,000 people directly, with a further 30,000 jobs in the UK supply chain. The plant is a flagship example of Just-in-Time (JIT) supply chain management.

How JIT works at Nissan Sunderland:

1. Tier 1 suppliers cluster nearby — around 30 key component suppliers are located within a short drive of the plant, many on dedicated supplier parks such as the Sunderland Vantec logistics hub. Seat manufacturers, exhaust systems, and glass suppliers operate "synchronous" delivery, meaning components arrive just minutes before fitting.

2. Minimal stock — Nissan holds only a few hours of some components on site. Seats, for example, are delivered in the exact order they will be fitted, matched to the specific cars coming down the line.

3. Electronic integration — Nissan's IT systems share real-time production schedules with suppliers, allowing them to manufacture and dispatch components to match the line's actual output rather than forecasts.

4. Kanban signals — a Japanese-origin visual system where a card, barcode, or electronic signal triggers a replenishment order the moment stock is used. This creates a "pull" rather than a "push" supply chain.

5. Reliable logistics — a network of trucks operates like a milk round, collecting components from multiple suppliers in tight time windows. Delivery tolerance is measured in minutes, not hours.

Benefits Nissan has achieved: