Shift-left
Moving testing activities earlier in development, when problems are cheapest to fix.
Definition
Instead of testing only at the end, testers review requirements, designs and early builds. Questions asked in a planning meeting can prevent bugs that would otherwise take days to fix later.
In practice
Spotting that a story never says what happens when a coupon expires during checkout, before any code is written.
Learn it in context
Lessons that use this term.