Peripheral to the checklist itself is the issue of flow pattern, where
the properly written checklist follows a set pattern of flow whenever
and where ever possible. This flow is an added aid that allows the
following of the checklist to an optimized standard in minimum time.

--
Dudley Henriques-

In a way it's not really peripheral, rather integral.

Older checklists, from say a 1975 150 are flow-wise pretty
disorganized compared to even 5 years later, 1980. Didn't the FAA get
involved with the flow of checklists in that time frame?

Anyway I definitely see a huge improvement in those 5 years from a
flow perspective.

I even write my own checklists that I use to make sure I test all the
scenarios that need to work in software I write BEFORE even sending it
to the QA department. Checklists for complex industrial construction?
I'd have hoped that would have been in use for years!