Projects proposed as early, under budget, and effective

Which projects besides the S-3 Viking were early, under budget, and effective?

Suggested examples include HMS Warrior, HMS Dreadnought, Napoléon, and the M1 Garand; the Dreadnought suggestion is explicitly tentative.

HMS Warrior is proposed as a project completed early and under budget, with HMS Dreadnought offered more tentatively. The French screw-propelled ship of the line Napoléon is another suggested naval example. The M1 Garand is also put forward as meeting the question's criteria. These examples lead into scepticism about claims that every military project succeeds on schedule and cost. Assertions of universal perfection, including propaganda claims about procurement, deserve particular scrutiny.