Sourcing strategy

Sourcing strategy is how a company decides what to buy rather than build, from how many suppliers, and on what commercial terms. The strategy is the choosing, not the contract that follows. It is set per category, then reviewed on a cycle.

Keep the strategy separate from its answers. Strategic outsourcing, a multi sourcing model and co sourcing are each one answer a strategy might reach — this page is about how the answer gets chosen.

Most companies never write one. Contracts get signed at different times by different people, and the portfolio that results is an accident nobody can defend at review.

Key takeaways

• The strategy decides what to buy, from how many suppliers, and on what terms.
• It is set per category of spend, then reviewed on a stated cycle.
• Market research comes before supplier selection, not after a shortlist exists.
• The written reason for each choice is what makes the next review possible.

How it works

Work one category at a time. Define what the business needs, research what the market can supply, decide the delivery route and the supplier count, then set terms and a review date against each choice.

Start with spend, not opinion. Pull twelve months of invoices by category, sort them by value, and the three categories at the top are where a written strategy pays for itself first.

Segment before you decide anything. High value and low risk invites competition, high value and high risk invites a long partnership, and low value of either kind should simply be made easy to buy.

Market research is the step most buyers skip. Public procurement treats it as compulsory: the Federal Acquisition Regulation (FAR) lets a contracting officer reuse market research gathered within the past 18 months only while it stays current and relevant.

Supply market research is the half most buyers miss. You are testing how many credible providers exist, how concentrated they are, and what their underlying costs actually move with.

Central buying bodies exist for the same reason. The UK’s Government Commercial Agency, formed on 1 April 2026 from Crown Commercial Service, names coordinating demand and managing supply markets among the jobs it does for the public sector.

Running this per category is the whole discipline of category management strategy. Telecoms, contact centre capacity and legal services face different markets and deserve different answers.

For service work the route is usually business process outsourcing (BPO) or a captive site. The question is not whether outsourcing works — it is which activities inside the category belong outside.

Terms carry the risk decision. A fixed price contract moves delivery risk to the provider and puts the premium on your invoice, while time and materials does exactly the reverse.

Location is a sourcing decision, not an afterthought. Time zone overlap, language, data residency and talent depth each rule categories in or out before price is discussed at all.

Exit belongs in the strategy, not only in the contract. Knowing in advance how a category would move back or move on is what keeps the next review a real decision.

Write the reason down. An allocation with a recorded rationale can be tested at the next review, and one without it survives long after the logic stopped applying.

Governance is the last column. Every category needs a named owner, a review month and a stated measure — without those three it is a document rather than a practice.

Examples

Four categories, four strategies: contact centre capacity, finance operations, software engineering and public sector buying. The same five decisions produce very different shapes, because each faces a different supply market and a different cost of a wrong call.

Contact centre capacity at a UK retailer. Peak volume goes to two offshore providers on three year terms, baseline stays in house, and the split is reviewed every January.

Finance operations at a mid market manufacturer. One provider, a five year term and a joint improvement plan, because the work is standardised and the cost of switching it again is high.

Software engineering at a fintech. Core product stays internal, platform work goes to a nearshore partner in Poland, and specialist security testing is bought by the engagement.

Public sector buying. Frameworks decide the supplier count before the department does — so the strategy is mostly about which framework fits and what the call off asks for.

Related terms

• Strategic outsourcing: one answer the strategy can reach, entered to build capability.
• Multi sourcing model: the portfolio design when the answer is several providers at once.
• Co sourcing: the answer where your team and a provider run the work together.
• Core outsourcing: contracting work close to what customers choose you for, and the risk that carries.
• Collaborative outsourcing: a relationship built on shared goals rather than unit price alone.

FAQ

What is a sourcing strategy?

It is the documented decision about what a company buys rather than builds, from how many suppliers, on what terms and for how long, set per category of spend.

How is it different from procurement?

Procurement runs the purchase. The strategy decides what that purchase should look like before anyone writes a tender document, and it covers categories procurement may never touch.

How many suppliers should a category have?

Enough to keep competition live without paying for integration you do not need. Sole supply suits standard work with a low switching cost; two or more suit specialist depth.

How often should it be reviewed?

Annually for most categories, and immediately when the market, the volume or the regulation moves. Put the review month in the strategy itself so it happens without anyone having to call for it.

Does it apply to small companies?

Yes, and the discipline matters more when one bad contract is a large share of spend.

Compare vetted providers in the Outsource Accelerator directory before you commit a category.