Because onboarding is owned by nobody in particular. HR, IT and the manager each have a sequence, they start at different times, and each assumes somebody else arranged the obvious things.
The joiner arrives to no laptop and a manager in back-to-back meetings, which is a poor return on a months-long hiring process.
Work backwards from the start date. Everything with a lead time — equipment, accounts, building access — needs its own date and owner, not a vague pre-start bucket.
Split by owner: HR tasks, IT requests through the service catalogue, and the manager's induction. Each person should see only their own list.
On offer acceptance, not on the start date.
Yes — a generic one gets ignored.
No. The request is raised and routed for approval.
Half an hour with your own data usually saves reading three of these. The guides will still be here afterwards.