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Public procurement

What does dividing a contract into lots mean in Swiss procurement?

Short definition

When dividing into lots, the authority splits a contract into several lots that can be awarded separately, for example by specialist area or region. Under Art. 32 PPA and IVöB it may form lots, limit the number of lots per supplier and set how bids for several lots are treated. For SMEs, lots ease access to large projects.

Tendering large projects as a single contract excludes many SMEs. Dividing into lots splits them into parts that can be awarded individually and opens up competition.

The rules

Art. 32 PPA and the corresponding IVöB provision allow the authority to divide the contract into lots and award them to one or several suppliers. It may limit the number of lots one supplier can win and provide that bids for several lots are evaluated together. These rules must be stated in the tender.

Typical divisions

By specialist area, for example development, operation and training of an IT system; by region or site; by time period or product group. Whether division makes sense depends on interfaces: too many lots create coordination effort for the authority, too few prevent competition.

What suppliers should note

The suitability criteria apply separately to each lot, often with different requirements. The bid/no-bid decision should be taken per lot: a supplier ideal for one lot need not bid for all. Where the authority allows combined bids, a discount for several lots can be an advantage if clearly stated.

Lots and consortia

Lots and bidding consortia are two routes to the same goal: giving SMEs access to larger contracts. Where there are no lots, joining with partners is often the only option.

Sources and references
  • Federal Act on Public Procurement (PPA/BöB, SR 172.056.1), Art. 32
  • Intercantonal Agreement on Public Procurement (IVöB 2019), Art. 32

Legal position as of October 2026. Not legal advice for an individual case.

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