Single-Source Selection (SSS)

Single-Source Selection (SSS) is a non-competitive consulting procurement method in which a development bank or implementing agency selects and negotiates directly with a single firm, bypassing the shortlisting and proposal process used in methods such as QCBS or QBS.

What is Single-Source Selection?

SSS is permitted only under specific, documented circumstances defined in the procurement regulations of the financing institution. The World Bank, ADB, AfDB, and other multilateral lenders all allow SSS but require the borrower to justify it in writing and, typically, to obtain no-objection from the bank before proceeding. Accepted justifications generally include: continuation of an existing assignment where a new firm would need substantial time to reach the same familiarity with the project; a genuine emergency that makes a competitive process impractical; a very small assignment value below which competition adds more cost than benefit; and situations where only one firm worldwide possesses a particular combination of expertise, proprietary data, or methodology.

The selection process under SSS still requires a formal tor and a negotiated contract. The absence of competition does not remove the obligation to agree on a reasonable scope and fee. Banks scrutinise SSS justifications closely during prior-review because the method is the most vulnerable to abuse in consulting procurement.

Why Single-Source Selection matters for bidders

For a supplier, SSS can represent either an opportunity or a competitive threat. On the opportunity side, firms with deep incumbency on a project, a genuinely unique methodology, or recognised niche expertise are well-positioned to be proposed as the single source by a client. Cultivating that position through strong delivery on earlier assignments, publishing proprietary research, or holding exclusive access to specialised data are the realistic paths to being named. On the threat side, SSS awards to competitors reduce the size of the open-competition pipeline, so tracking SSS contract award notices through step or institution procurement portals gives firms intelligence on where incumbents are entrenched and where competition will eventually open up.

FAQ

What justification is required for SSS?

The borrower must document in the procurement plan and in a formal memo why one of the accepted grounds applies, such as emergency, continuation, or unique expertise, and must receive the bank's no-objection before signing the contract.

Does SSS mean price is not negotiated?

No. The absence of competition does not fix the fee. The bank expects the borrower to negotiate the scope and price against the published terms of reference and to confirm the agreed fee is reasonable relative to market rates.

Can a firm proactively suggest SSS to a client?

A firm can highlight its unique qualifications and continuity value, but the formal SSS decision must be made and documented by the borrower and approved by the bank. A firm that appears to have engineered the SSS nomination may trigger an integrity review.