The two weeks before a team starts decide its first 100 hours.

The First 100 Hours sets out what happens when a managed engineering team joins an existing product. It also shows where the time actually goes. The common failure is not missing documentation. It is that teams treat onboarding as a knowledge problem. In truth, its critical path is access. Teams plan the architecture walkthrough carefully and improvise the identity provisioning. Then they lose the first week to single sign-on, repository permissions and a cloud console request in somebody’s queue. Knowledge transfer compresses. A security review does not.

The paper proposes four clocks that all run in parallel from hour zero. Each has a different owner and a different lead time: access, context, contribution and cadence. Almost every stalled onboarding traces to one clock that started late. Usually it is the clock the buyer owns. The paper supplies the preparation checklist for the fortnight before and a phase plan across the 100 hours. It gives criteria for choosing first tasks, and the two metrics worth tracking. Most of this work is yours, not your partner’s. Read it before your next team starts, not after.