A material change in duties or placement needs reassessment; do not assume the original knowledge explanation covers the new work.
Check both scope and supervision
Preserve the current and earlier proposal and identify what changed. A production deadline or customer request does not itself authorize a different assignment. L-1B stay is capped at five years.
Sequence the case around factual readiness, not only a customer launch. Confirm the qualifying foreign year, the U.S. task, entity relationship and any third-party placement restrictions before setting a work date.
Hypothetical example: a desalination-controls developer wants a specialist to troubleshoot a customer site, but the customer contract later shifts the worker to routine maintenance under the customer’s supervisor. The signed placement terms, statement of work and control provisions identify whether the assignment remains supportable. A production emergency does not suspend the five-year limit or authorize work outside the approved arrangement.
Assess a material revision before it becomes the employee’s daily reality. Save the original and revised assignment terms together. A clear comparison lets the employer decide promptly whether a business change affects the basis previously described, instead of discovering the mismatch during a later extension.