What does codesigning mean?
Codesigning is the practice of developing two tightly coupled systems at the same time rather than in sequence, so that design decisions on one side inform and improve the other. Its dominant use is in computer engineering, where hardware–software codesigning treats a processor and the software destined for it as parts of a single design problem: instruction sets, compilers, and circuits are shaped together instead of one being frozen before the other begins. The approach can yield dramatic gains in performance, cost, and energy efficiency, which is why it underpins much modern chip design. More broadly, codesigning describes any genuinely collaborative design process between interdependent parties. The word should not be confused with "code signing," the unrelated cryptographic practice of digitally signing software. Technical in register, it signals rigor and integration — the belief that things designed together work better apart than things designed alone.
nounThe practice or process of designing two related systems, components, or products simultaneously and interactively so that they work together optimally; most commonly, the coordinated design of hardware and software.
- The simultaneous, interactive design of hardware and software components of a computing system so that each is optimized in light of the other.
- More generally, the collaborative or concurrent design of any two interdependent products, systems, or artifacts by multiple parties.
"Hardware–software codesigning allowed the team to squeeze far more performance out of the chip than either discipline could have achieved alone."
"Through careful codesigning, the processor's instruction set was tailored to exactly what the compiler could exploit."
"The agency practiced codesigning with local communities, shaping the transit system and its surrounding development as one project."
In engineering, 'codesigning' is the opposite of throwing work over the wall: hardware and software teams build their halves together from day one, because neither can be truly optimized without the other.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of codesigning
Codesigning combines the prefix "co-", from Latin "com-" meaning "together", with "design", which entered English via French from Latin "designare" ("to mark out"), itself from "de-" plus "signum" ("sign"). The compound arose in twentieth-century engineering vocabulary as collaborative and concurrent design practices spread, becoming widespread in the 1990s with the growth of hardware–software co-design as a formal research field. It shares its Latin root with words such as "designation" and "resign".
Related word forms
How codesigning is actually used
Predominantly a technical term used in computer engineering and systems design; outside those fields it may simply denote collaborative design. Often hyphenated as "co-design" in general usage, while the solid form is standard in hardware–software engineering literature.
Easily confused with codesigning
"Code signing" refers to digitally signing software with a cryptographic certificate to prove its authenticity, whereas "codesigning" means designing two systems (typically hardware and software) jointly and simultaneously.