Time To First "Hello, World!" (TTFHW, sometimes known as bootstrap time) represents the time it takes for a user to onboard to an API, framework, project or team. How long it takes for a developer to get started and begin being productive in an organisation.

Strengths

Important during scale

In high growth companies, it is important to be able to get new engineers up and running fast. This allows you to effectively hire and train developers rapidly.

Less cognitive load during set-up means developers are able to be more productive on their area of work, instead of dealing with "red tape" trying to work with the dev stack.

Limitations

Not a Substitute for Cycle Time

Cycle Time is a critical metric for understanding the health of your Software Development Lifecycle and understanding bottlenecks.

TTFHW measures a small window before developers start cycling through work. Whilst it's a critical area to measure, it isn't everything.