Work back from the evidence, not from the desired start date. Reconstructing the qualifying year and the corporate chain typically takes longer than adjudication, and the manager cannot begin U.S. employment before approval.
Build the record before you book the move
Hypothetical example: a Grand Bay-Westfield distributor tells its U.S. customers that the new depot manager starts on the first of next month, then discovers that the payroll system was replaced four years ago and the earlier records sit with a former provider. Announcing a date before the file exists is the pattern that causes real damage, because the company either delays publicly or is tempted to let her begin working while the petition is pending, which she may not do.
A more workable sequence is to assemble the corporate and payroll evidence first, have the duty description reviewed, file, and only then commit to a date with a margin for a request for further evidence. Faster adjudication can be purchased, but it compresses the government's part of the timeline and not the company's.