Scopes the migration, plans the mapping, and runs cutover through three gates: correctness, rollback and decommission.
Private skill · shared by invitation · How access works
Go-live happens before anyone agreed what a good load looks like.
Nobody holds the decision, or the deadline, at 3am.
Dual running becomes permanent.
A fast, complete-looking plan tempts teams to skip rehearsal.
Quantity is sources × fields, not rows. Then choose Big Bang or incremental.
Profile the source first, then map target to source, field by field.
Counts, control totals and business assertions, agreed before go-live.
A runbook with owners and clock times, a rollback trigger and a decommission milestone.
Source and target inventories, profiling output, business downtime tolerance.
The rollback call at 3am, and the politics of switching the old system off.
Thirty minutes with Harveer, on your own data problem.