Strategic Sourcing for Manufacturers: 8 Sourcing Strategies and When to Use Each
Strategic sourcing for manufacturers is the planned way a manufacturer chooses suppliers and terms for each category it buys, from raw materials and parts to MRO supplies, packaging and freight. Each category gets its own sourcing strategy: one supplier or several, local or global, make or buy. The choice rests on total cost and supply risk, not unit price alone.
Below are the eight sourcing strategies manufacturers use most, a table matching them to categories of plant spend, and a seven-step process to put one in place. Our guide to direct vs. indirect procurement explains which purchases count as which, so this article only touches on it.
What strategic sourcing means for a manufacturer
Strategic sourcing is a continuing process, not a one-time price cut. For each category of spend, a manufacturer studies the suppliers that could serve it, chooses a strategy and a supplier, and checks the results until the next sourcing round.
The test is total cost, not the price on the quote. For a production part, total cost includes freight and duties, the inventory you hold, quality failures and rework, and the cost of switching suppliers. For a maintenance part, it includes whether the part is on the shelf when a line goes down.
Strategic sourcing is the part of procurement that decides who you buy from and on what terms. Purchasing then places orders under those terms. Our article on procurement vs. sourcing explains the split.
8 sourcing strategies manufacturers use
A sourcing strategy is a plan for buying one category: how many suppliers, from where, whether to make or buy, and on what terms. The eight below are the ones manufacturers use most, and they can be combined. A plant might buy a resin from two suppliers, both on index-linked contracts, for example. The examples in this article are illustrations, not client projects.
| Strategy | What it means | Usually fits | Main risk |
|---|---|---|---|
| Single sourcing | One supplier by choice, although others could supply | Engineered parts with costly tooling; items where one supplier's volume price is clearly better | A failure at that supplier stops you |
| Dual or multiple sourcing | The same item from two or more qualified suppliers | Critical raw materials and components | Higher prices and the cost of qualifying a second source |
| Supplier consolidation | Fewer suppliers for a category, across all plants | MRO supplies, packaging, freight, plant services | Relying on too few suppliers if it goes too far |
| Global and low-cost-country sourcing | Suppliers abroad, for price or capability | Stable, high-volume items with clear specifications | Long lead times, duties, currency and quality risk |
| Nearshoring and local sourcing | Suppliers close to the plant | Bulky, urgent or often-changed items | Higher unit prices |
| Make or buy | Producing in-house or buying from an outside supplier | Components, subassemblies, machining, services | Losing control (buy) or tying up capital and staff (make) |
| Long-term agreements with index-linked prices | Multi-year contracts whose prices follow a named index | Metals, resins and other volatile inputs | An index that doesn't track the supplier's real costs |
| Supplier-managed inventory | The supplier keeps your stock filled, sometimes on consignment | MRO consumables, fasteners, packaging | Stock levels and prices nobody checks |
1. Single sourcing
Single sourcing means buying an item from one supplier even though others could supply it. Manufacturers often single-source engineered parts, because tooling, qualification and engineering support make a second supplier expensive. Giving one supplier the full volume can also earn a better price.
Sole sourcing is different: only one supplier can supply the item, often because it owns the design, the patent or a unique process. A sole supplier has more bargaining power, so settle prices, lead times and spare-parts terms early. In both cases, plan for a supplier failure. Hold enough safety stock to cover the time it would take to qualify another source.
2. Dual and multiple sourcing
Dual sourcing splits the volume for one item between two qualified suppliers. Multiple sourcing spreads it across three or more. Manufacturers use them for critical raw materials and components, where a fire, strike or shortage at one supplier would stop production.
A second source costs money. Each supplier gets less volume, so prices may rise, and qualifying a new source can mean trial runs, inspections and duplicate tooling. A common compromise is to give one supplier most of the volume and keep a qualified second supplier active on a smaller share, ready to take more if needed.
3. Supplier consolidation across plants
Supplier consolidation cuts the number of suppliers in a category and combines volume across plants. Multi-plant manufacturers often find each site buying the same items from its own local suppliers at different prices. Moving MRO supplies, packaging, freight or waste hauling onto one or two suppliers per category usually brings better prices, one price list and one set of service terms.
Consolidate the contract, not necessarily the delivery. A national supplier can still serve each plant from a local branch. Keep a backup for anything critical to uptime.
4. Global and low-cost-country sourcing
Global sourcing means buying from suppliers in other countries, for a lower price or a capability you can't find closer to home. Global sourcing fits stable, high-volume items with clear specifications.
Compare offers on landed cost, not the price at the supplier's factory. Freight, insurance, duties, inventory in transit and quality checks all count. Our article on landed cost vs. should cost explains both measures.
Name the Incoterms rule and its version in the contract, too. The International Chamber of Commerce says the rules clarify "the tasks, costs and risks involved in the delivery of goods from sellers to buyers." Its most recent version, Incoterms 2020, took effect on January 1, 2020 (ICC).
5. Nearshoring and local sourcing
Nearshoring moves supply to a nearby country, such as Mexico or Canada for a US plant. Local sourcing buys from suppliers within easy reach of the plant. Both shorten lead times, lower transit risk, make engineering visits easier and can reduce the inventory you hold. Nearby suppliers suit bulky or heavy items, urgent replacement parts and parts whose design changes often.
The unit price may be higher than a distant low-cost supplier's. Compare the two on landed cost and on what a late shipment would cost you.
6. Make or buy: insourcing and outsourcing
A make-or-buy decision sets whether a part, subassembly or service is produced in-house or bought from an outside supplier. Outsourcing makes sense when a supplier does the work better or for less, or when your own capacity is better used elsewhere. Insourcing makes sense when the work is core to your product, when quality is hard to control from outside, or when few suppliers can do it.
Compare the full cost of making, including equipment, labor, overhead and the capacity it uses, with the full cost of buying, including freight, inspection and managing the supplier. Contract manufacturing of a whole product is the far end of the same decision.
7. Long-term agreements with index-linked prices
A long-term agreement fixes the supplier, the terms and usually a volume commitment for several years. For inputs whose costs swing, such as metals and resins, a price fixed for years leaves one side carrying the risk. The supplier carries it if costs rise, and you carry it if they fall. An index-linked price moves with a published index named in the contract, such as a government producer price index or a commodity exchange price, so both sides share the swings.
US federal contracting rules describe the same mechanism. A fixed-price contract with economic price adjustment "provides for upward and downward revision of the stated contract price upon the occurrence of specified contingencies." One of the three types the rule lists is based on labor or material cost "indexes that are specifically identified in the contract" (48 CFR 16.203-1). Write down which index applies, how often prices reset and what share of the price moves with it.
8. Supplier-managed inventory and consignment
With supplier-managed inventory, often called vendor-managed inventory (VMI), the supplier watches your stock and refills it to agreed levels. With consignment, the supplier owns the stock on your site until you use it, so you pay only for what you take. Both are common for MRO consumables, fasteners, cutting tools, safety supplies and packaging, because they cut stockouts and the work of reordering.
Both need checking. Agree the item list, prices and stock levels in the contract, and compare what you're billed with what was used.
Which sourcing strategy fits which category
The right sourcing strategy depends on the category. Raw materials need steady supply at a predictable cost, while a maintenance part needs to be on the shelf when a line goes down. The table shows where manufacturers usually start; adjust it for your own volumes, risks and suppliers.
| Category | Strategy that usually fits | Watch for | Who should sign off |
|---|---|---|---|
| Raw materials and commodities, such as steel, resin and chemicals | Dual or multiple sourcing on index-linked long-term agreements | Price swings; allocation during shortages | Procurement, finance, production planning |
| Engineered components and custom parts | Single sourcing, with a qualified second source for critical parts | Who owns the tooling; how long qualification takes | Engineering and quality |
| Capital and engineered equipment | A competitive bid on total cost of ownership | Spare parts, service rates and training priced after the sale | Engineering, operations, finance |
| MRO supplies and spare parts | Consolidation onto one or two distributors; supplier-managed inventory for consumables | Prices drifting from the agreed list; critical spares on hand | Maintenance |
| Packaging | Consolidation across plants, standard specifications, supplier-managed inventory | Specification changes; printing plates and tooling | Operations and quality; marketing for printed packaging |
| Freight and logistics | Several carriers, bid lane by lane | Accessorial fees and fuel surcharges | Logistics or shipping |
| Contract labor | One or two staffing suppliers with agreed markups | Bill rates and fees that differ from the contract | Human resources and operations |
| Plant services, such as waste hauling, uniforms, janitorial and forklift service | Consolidation across plants, often with regional suppliers | Automatic renewals and added fees | Plant managers; environmental, health and safety staff for waste |
Capital equipment deserves a note. The best time to negotiate spare parts, service rates and training is before the purchase order, while several equipment makers are still competing for the order. After installation, many spares and service visits can only come from the original maker.
Sorting categories by spend and supply risk
A simple grid shows where sourcing effort pays. Rate each category on two things: how much it affects your costs, and how hard it would be to replace the supplier. The idea goes back to Peter Kraljic's article "Purchasing Must Become Supply Management" in the September 1983 Harvard Business Review (HBR). The labels below are plain-language ones, not his.
| Easy to replace the supplier | Hard to replace the supplier | |
|---|---|---|
| Large effect on cost | Compete. Bid it regularly, combine volume and negotiate hard. Examples: packaging, freight. | Partner. Long-term agreements, an approved backup supplier, joint cost reviews. Examples: a critical resin, a custom component. |
| Small effect on cost | Simplify. Put it on a contract or catalog and cut the work of buying. Examples: office and breakroom supplies. | Secure. Hold safety stock, qualify alternatives and design out unique items. Example: a proprietary spare part. |
Many plant categories, such as MRO supplies, packaging and freight, fall in the left-hand column, where competition and consolidation work well. Categories in the right-hand column need engineering involvement and a contingency plan.
The strategic sourcing process for manufacturers, in 7 steps
The strategic sourcing process is the same for any category. In a plant, what changes is who has to be involved and how long qualifying a supplier takes.
1. Build a cross-functional team
Put procurement together with the people who will live with the result. Include maintenance for MRO and spares, quality and engineering for production parts, logistics for freight and finance for the numbers. Agree on the goal and the decision rules before any supplier is contacted. A switch that maintenance had no part in choosing is hard to make stick.
2. Analyze spend and requirements
Pull a year or two of invoices and purchase orders for the category, from every plant. Show who buys what, from whom and at what price, item by item. Look for the same part bought at different prices, rush orders and suppliers nobody manages. Then write down the requirements: specifications, volumes, service levels and which items are critical to uptime.
3. Study the supply market
Find out who can supply the category, how prices are built and what drives them, such as raw material indexes, energy, labor and freight. Check each supplier's capacity, lead times, finances and locations. For critical items, look for single points of failure, such as one factory or one sub-supplier behind several suppliers.
4. Choose the strategy and the route
Pick the sourcing strategy from the eight above, then the route to market. Use a request for quotation when specifications are clear, a request for proposal when service or design matters, and a renegotiation when switching would cost more than it saves. Our guide to procurement methods compares the routes. Set the scoring criteria and weights now, before any bids arrive.
5. Qualify suppliers and run the bid
Send the request to qualified suppliers only. For production parts, qualification can mean samples, first-article inspection, a trial run or a site audit.
Check the quality certifications your industry expects, such as ISO 9001 or, for automotive parts, IATF 16949, which is kept aligned with ISO 9001 (IATF). Automotive suppliers also follow a formal production part approval process (PPAP). Compare offers on total cost: price, freight and duties, inventory, quality costs and the cost of switching.
6. Negotiate and sign the contract
Negotiate more than price. Settle how prices can change and against which index, volume commitments, lead times, safety stock or consignment, quality terms and charges for defects, and payment terms. For imports, add the Incoterms rule. Also settle who owns the tooling and how either side can end the contract.
7. Implement and keep checking
Plan the switchover. Build buffer stock, run the old and new suppliers side by side for critical items, and load the new prices into your purchasing system.
Then check that invoices match the contract, and review the supplier on delivery, quality and service. Monthly scorecards and quarterly business reviews are a common rhythm for key suppliers. Start the next sourcing round well before the contract ends.
Benefits of strategic sourcing for manufacturers and OEMs
For original equipment manufacturers (OEMs) and other producers, strategic sourcing pays off in five ways:
- Lower total cost. Prices are set by competition and evidence, and freight, inventory and quality costs count as well as price.
- Steadier supply. Qualified backups, safety stock and supplier checks make it less likely that one failure stops a line.
- Consistent quality. Suppliers are qualified before they ship and measured after.
- More options. Regular market reviews turn up new suppliers before you need them.
- Fewer surprises at renewal. Contracts end on dates you planned for, with time to go back to market.
Common mistakes in manufacturing sourcing
- Buying on unit price alone. A cheaper part that arrives late or fails inspection costs more than it saves.
- Leaving maintenance or quality out. People work around suppliers they had no say in choosing.
- Single-sourcing by accident. Over time, one supplier ends up with a critical item and nobody has a backup plan.
- Letting each plant buy on its own. The same items are bought from several suppliers at different prices, and no one sees the total.
- Signing and not checking. Invoice prices drift from the contract and rebates go unclaimed. A contract compliance audit compares what was billed with what was agreed.
- Fixing prices on volatile inputs. Without an index clause, a long fixed price often ends in a renegotiation or a dispute when costs move.
Common questions
What are the types of sourcing strategies?
The types of sourcing strategies cover how many suppliers to use, where to buy, whether to make or buy, and how to contract. The main ones are single sourcing, dual or multiple sourcing, supplier consolidation, global sourcing, nearshoring, make or buy, index-linked long-term agreements and supplier-managed inventory. Most manufacturers choose one for each category.
What are the 7 steps of strategic sourcing?
Strategic sourcing has seven steps. The first three are building a cross-functional team, analyzing spend and requirements, and studying the supply market. The last four are choosing the strategy and route, qualifying suppliers and running the bid, negotiating the contract, and implementing and checking the results. Other guides name the steps differently, but the order is much the same.
What is the difference between single sourcing and sole sourcing?
Single sourcing is a choice: other suppliers could supply the item, but you buy from one. Sole sourcing is a constraint: only one supplier can supply it, often because it owns the design or the patent. Single sourcing can be reversed with a new bid. Sole sourcing needs a contingency plan, such as safety stock or a redesign.
Is dual sourcing worth the cost?
Dual sourcing is worth the cost when a supply failure would stop production and a second source can be qualified at a reasonable cost. Dual sourcing is rarely worth it for low-value items that are easy to buy elsewhere. Many manufacturers keep a qualified second source on a small share of volume for their most critical materials and parts.
What is sourcing in supply chain management?
Sourcing in supply chain management is the work of finding, evaluating and contracting with the suppliers that provide an organization's materials, parts and services. Sourcing sets which suppliers you use and on what terms. Purchasing, receiving and payment then follow those terms, and supplier performance is checked against them.
Where outside help fits
Outside help is most useful when several categories come up for renewal at once, or when your team has no time to run a full sourcing round. Dryden Group is a procurement consulting firm. With manufacturers, we work across many spend categories, including the goods and services that keep plants running, such as MRO supplies, freight and plant services.
Our strategic sourcing service runs the process across many suppliers and categories, then tracks the savings for at least 12 months. See how we work with manufacturers.
Related service: Strategic Sourcing →
.svg)