Only if the activity is genuinely business-visitor activity, which installation and commissioning of sold equipment can be in narrow circumstances; performing the L-1B work itself before approval is not permitted.
Do not let the visitor entry become the assignment
Hypothetical example: There is a narrow allowance for a Canadian business visitor to install, service or repair commercial equipment purchased from outside the United States under a contract of sale, and to train U.S. workers to do so, without receiving pay from a U.S. source. A Portugal Cove-St. Philip's developer might lawfully make a short visit of that kind. The danger is that a short visit becomes the multi-month commissioning assignment the L-1B petition describes, performed before the petition is approved. Officers at the port compare the stated purpose with the earlier petition, and inconsistency damages both the visit and the later admission. The safer sequence is to file the petition once the qualifying year is documented, use premium processing if the hatchery schedule is tight, and begin the on-site work only after approval and admission in L-1B status. If the customer cannot wait, the affiliate should send a U.S. employee for the interim rather than stretch the visitor rules.
Hypothetical example: a commercial-bakery systems company wants its process specialist in the United States for the installation of a new line, but the specialist's qualifying foreign year ends after the customer's preferred commissioning date. The business must decide whether to revise the installation schedule or assign the work to another authorized employee. The payroll record fixes the earliest eligibility date, while the customer contract shows whether delay is commercially possible. Starting with both documents avoids a petition based on a deadline that immigration rules cannot accelerate.