Chapter 16: Global Sourcing

Purchasing is the old-school term — placing orders, getting invoices, paying bills. It's transactional.

Strategic sourcing is the modern upgrade: developing and managing supplier relationships to acquire goods and services that help the business compete. Globalization made supply chains so complex that "just buying stuff" isn't enough anymore.

The bullwhip effect is when small changes in consumer demand get magnified as they ripple upstream through the supply chain — from retailer → distributor → manufacturer → raw material supplier.

Think of it like cracking a bullwhip: a tiny flick of the wrist produces a massive snap at the tip. Key cause: Forward buying — retailers stock up during temporary price cuts, creating artificial demand spikes upstream.

Key solution: Continuous replenishment — replacing inventory frequently as part of an ongoing, data-driven process.

Specificity = how common an item is and how many substitutes are available.

Low specificity (generic items, many substitutes) → simple purchasing methods like spot purchases or electronic catalogs.
High specificity (unique items, few substitutes) → complex methods like RFPs or strategic alliances.

The Sourcing/Purchasing Design Matrix maps methods by contract duration (short ↔ long), specificity (low ↔ high), and transaction costs (high ↔ low):

Method	When to Use	Example
Spot Purchase	One-time buy, generic item, low specificity	Buying extra pallets before holiday rush
Electronic Catalog	Routine reorders, standardized items	Amazon Business for office supplies
Request for Bid / Reverse Auction	Mid-range complexity, multiple potential vendors	Bidding out a freight contract
Request for Proposal (RFP)	Complex/expensive items, short contract, low specificity	Hiring a consulting firm for a 3-month project
Vendor-Managed Inventory (VMI)	High specificity, long contract, low transaction cost	Frito-Lay restocking Walmart shelves directly
Strategic Alliance	High specificity, long contract, high transaction cost	Apple + TSMC for custom iPhone chips

Tier	Who They Are	Relationship
Tier 1	Direct suppliers — sell finished components directly to you	You have contracts and regular contact with them
Tier 2	Suppliers to your Tier 1 — provide sub-components or materials	You may know them, but don't buy from them directly
Tier 3+	Raw material suppliers deep in the chain	Often invisible to you — but disruptions here can shut you down

Why it matters: COVID and the chip shortage taught every company that you can't just manage Tier 1. A disruption at Tier 3 (e.g., a cobalt mine shutting down) can cascade all the way up to empty store shelves.

Tesla (OEM — builds the car)

Tier 1: Panasonic/CATL (battery cells), Bosch (braking systems), suppliers who deliver finished modules directly to Tesla's Gigafactories.

Tier 2: Companies that supply Panasonic — e.g., producers of nickel sulfate, lithium hydroxide, and separator film for battery cells.

Tier 3: Lithium brine operations in Chile, nickel mines in Indonesia, graphite mines in Mozambique.

The textbook's framework evaluates three dimensions:

Factor	Keep In-House When…	Outsource When…
Coordination	Interfaces are standardized and codified	Coordination is complex and job-specific; technology is immature
Strategic Assets	Assets are commonly available	Specialized investments needed; long R&D learning curves
Intellectual Property	Strong IP protection; hard to imitate	Weak IP protection; easy to copy if access is given

TCO = the full lifecycle estimate of what an item actually costs — not just the purchase price, but everything from buying to using to disposing of it.

The 3 buckets:

1. Acquisition Costs — purchase planning, quality costs, taxes, purchase price, financing
2. Ownership Costs — energy, maintenance & repair, financing, supply chain/network costs
3. Post-Ownership Costs — disposal, environmental costs, warranty, product liability, customer dissatisfaction

The framework maps demand characteristics (functional vs. innovative) against supply process (stable vs. evolving):

1. Inventory Turnover = COGS ÷ Average Aggregate Inventory Value
→ Measures how often you replace inventory per year. Higher = better (faster flow, less cash tied up).

2. Weeks of Supply = (Avg Aggregate Inventory Value ÷ COGS) × 52
— or equivalently: 52 ÷ Inventory Turnover
→ Measures how many weeks of stock you're sitting on. Lower = leaner.