Step 1
Find the constraint
Map the workflow that actually runs, not the one in the documentation.
Most teams are optimizing something that isn't the bottleneck. The reporting gets rebuilt while the real problem sits three steps upstream in a handoff nobody has looked at in two years.
So the first work is watching the process run and finding where it actually binds. That usually means sitting with the people doing the work rather than the people describing it.
What you get: A clear statement of the real constraint and what it costs you, in time, capacity, errors, or dependency on one person.