Explain the actual method, relevant existing knowledge and any new learning needed. Have the proposed duties assessed before relying on experience with a different process. Two dates matter and they are rarely the same: the day the receiving site wants the applicant, and the day the applicant will actually hold knowledge that site needs. Where a new method is being introduced there, the second date may fall after a period of joint work. Say so in the plan rather than presenting a future capability as a present one, because the petition is judged on what is true when it is filed.
Check the actual connection before scheduling the transfer
Similar service labels do not establish identical internal requirements. Identify what the applicant already knows and how it applies, rather than treating a future training plan as present knowledge. Where the two dates cannot be reconciled, the choices are real and worth naming.
The transfer can be deferred until the applicant has worked with the receiving method; the assignment can be rewritten around the knowledge actually held today; or a different category may fit better and should be assessed on its own conditions. Each option costs something, and the cost is easier to accept before a start date has been promised to a landlord, a school and a departing colleague. Note also that L-1B stay is generally limited to five years, so a slow start consumes part of a finite period.