FAR and DFARS › FAR Part 34: Major System Acquisition
FAR 34.005-4 Demonstration contracts.
The codified text (eCFR, as of 2026-10-02). Under the Revolutionary FAR Overhaul ↗, agencies follow class deviations with new text for many parts while the formal rules go through the Federal Register: check the solicitation and your contract's clauses, which rule.
In plain English
This section addresses contracts for the demonstration phase of a major system acquisition. It says that, when practicable, these contracts should require contractors to submit priced proposals for full-scale development by the end of the phase, with the Government funding that proposal work. It also directs the contracting officer to give contractors the test conditions, performance criteria, life cycle cost factors, and other selection criteria they need to prepare those proposals.
Applies to: Contracts for the demonstration phase of a major system acquisition
What it requires
- Submit priced proposals for full-scale development by the end of the demonstration phase, when the contract provides for it
- Prepare proposals using the operational test conditions, performance criteria, life cycle cost factors, and other selection criteria the contracting officer provides
Key terms: demonstration phase · full-scale development · priced proposals · operational test conditions · life cycle cost factors
Written by AI from this section's text. A guide, not legal advice: the text below rules.
The text
Whenever practicable, contracts for the demonstration phase should provide for contractors to submit, by the end of the phase, priced proposals, totally funded by the Government, for full-scale development. The contracting officer should provide contractors with operational test conditions, performance criteria, life cycle cost factors, and any other selection criteria necessary for the contractors to prepare their proposals.
← 34.005-3 Concept exploration contracts. · 34.005-5 Full-scale development contracts. →
Source: eCFR, 48 CFR chapters 1 and 2 (GPO GovInfo bulk data) ↗. Plain words for the terms: glossary.