in silico
This glossary entry explains in silico for AI governance and model risk programs. The sections below summarize what the term means in plain language, why chief AI officers and cross-functional committees track it, where teams often get confused, and—when you are signed in—how it shows up across major industries and in expectations tied to the EU AI Act and NIST AI RMF. Use related links at the end of the page to explore neighboring concepts without losing context.
What It Means
In silico refers to conducting experiments, tests, or research using computer simulations and models instead of physical lab work or real-world trials. It's essentially running virtual experiments on computers to predict outcomes, test hypotheses, or explore scenarios before investing in actual implementation.
Why Chief AI Officers Care
In silico testing can dramatically reduce costs and speed up AI model development by allowing teams to simulate thousands of scenarios without expensive real-world testing. It's particularly critical for AI safety testing and regulatory compliance, where you need to demonstrate your models work properly across many conditions before deployment. However, CAIOs must ensure their simulations accurately reflect real-world complexity, as gaps between simulated and actual performance can lead to costly failures.
Real-World Example
A pharmaceutical company uses in silico drug discovery to screen millions of potential compounds through computer models before selecting just a few hundred for actual lab testing. This replaces years of expensive wet lab work with weeks of computational analysis, identifying the most promising drug candidates while eliminating obvious failures early in the process.
Common Confusion
People often think in silico results are automatically less reliable than real-world testing, but well-designed simulations can actually be more comprehensive than limited physical experiments. The key confusion is assuming simulation means 'fake' rather than understanding it's a different but often superior method for initial testing and validation.
Industry-Specific Applications
See how this term applies to healthcare, finance, manufacturing, government, tech, and insurance.
Healthcare: In healthcare, in silico methods are used for drug discovery, clinical trial design, medical device testing, and persona...
Finance: In finance, in silico modeling enables institutions to run sophisticated risk assessments, stress tests, and portfolio o...
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Includes:
- 6 industry-specific applications
- Relevant regulations by sector
- Real compliance scenarios
- Implementation guidance
Technical Definitions
NISTNational Institute of Standards and Technology
"carrying out some experiment by means of a computer simulation"Source: World_Wide_Words_In_silico
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