When you should NOT reach for AI

Q: AI is trendy — but when is a plain rule or script the better choice?

AI is not the default answer — for plenty of tasks a plain rule or a deterministic script is cheaper, faster and far more reliable. Typical cases where AI is not recommended: well-defined tasks with stable rules such as calculations, pricing or tax logic, validations and status transitions; anything where 100% reliability and repeatability are non-negotiable and the same input must always produce the same output; results that have to be explained or audited step by step, for example for compliance or finance; simple, high-volume operations where a few lines of code are cheaper and easier to maintain; latency-, cost- or privacy-sensitive work, including anything that must run offline; and safety- or money-critical decisions that cannot tolerate an occasional confident-but-wrong answer. The sweet spot is usually a mix: let AI handle the fuzzy, human-language parts and wrap deterministic rules around it as guard-rails, so the critical steps stay exact and predictable.

Question

QuestionAI is trendy — but when is a plain rule or script the better choice?

Accepted Answer

AI is not the default answer. Prefer a plain rule or a deterministic script — not AI — whenever a task looks like one of these:

Well-defined tasks with stable rules — calculations, pricing or tax logic, validations, status transitions.
Anything where 100% reliability and repeatability are non-negotiable and the same input must always give the same output.
Results that must be explained or audited step by step, e.g. for compliance or finance.
Simple, high-volume operations where a few lines of code are cheaper, faster and easier to maintain.
Latency-, cost- or privacy-sensitive work, including anything that must run offline.
Safety- or money-critical decisions that cannot tolerate an occasional confident-but-wrong answer.

The sweet spot is usually a mix: let AI handle the fuzzy, human-language parts and wrap deterministic rules around it as guard-rails, so the critical steps stay exact and predictable.