What does it mean that workflow checkpoints?

Build verification points into workflows to catch errors before they propagate downstream.

Example: A product team ships a feature that breaks the checkout page. The bug was introduced during the design phase — a button was labeled "Submit" but wired to a cancellation endpoint. The design was reviewed by no one. The code was reviewed by a developer who didn't compare the implementation to the spec. QA tested only the happy path. Staging was skipped because of a deadline. Four checkpoints existed on paper; none of them caught the error because none of them asked the right verification question at the right moment. A single design review checkpoint — "Does every interactive element match its intended behavior in the spec?" — would have caught the bug six weeks before it reached a customer.

Try this: Choose a workflow you completed recently that produced a result you were unhappy with — a document with errors, a project that went over budget, a meal that turned out wrong, a presentation that missed the audience. Trace the error backward to its point of origin: where in the workflow did the mistake first enter? Now identify the earliest point after that origin where a verification question could have caught the error. Write that verification question explicitly — not a vague "check the work" but a specific question with a yes-or-no answer. Insert that checkpoint into your workflow for next time. Then ask: are there other convergence points in this workflow — places where parallel tracks merge or where the output of one step becomes the input to many subsequent steps — that deserve their own checkpoint?