It should shape the assignment plan but not the eligibility facts. The continuous year abroad, the qualifying relationship and the documented knowledge either exist before filing or they do not.
Align the assignment with the process, not the launch party
Commissioning dates move, and petitions do not accelerate to match them. Build the schedule from the fixed points: the date the employee completes one continuous year of qualifying employment abroad within the preceding three years, the date the internal evidence is actually assembled, and realistic adjudication times, noting that premium processing changes decision speed only. Then decide what the U.S. site will do if the transfer lands after the line starts, because that contingency is more useful than an optimistic date. If the assignment is genuinely tied to a commissioning window, say so in the petition as the business reason for the transfer; a specific operational purpose strengthens the knowledge claim rather than weakening it.
Hypothetical example: a printing-ink formulation company plans a launch transfer while its specialist's qualifying foreign employment is interrupted by a planned leave. Calculate the qualifying period before announcing the transfer date, and preserve payroll, leave and return-to-work records that explain the timeline. The first review should identify the technical documents that need authorization for release and schedule their collection before the petition is drafted. If a client-site contract will govern the work, resolve control and supervision terms early. A rushed filing tends to describe the specialized knowledge broadly because the relevant technical witnesses have not yet been consulted.