The company's own written procedure with a dated revision history showing internal development and identifying the analyst as a contributor or trainer can be powerful evidence. USCIS weighs the entire record, however, and does not require that particular exhibit.
The procedure manual, dated and attributed
A process-based L-1B claim is strengthened when the adjudicator can see the process. The workflow manual — the extraction rules, validation steps, scoring thresholds and quality gates as the company actually applies them — can make the knowledge concrete and show how it relates to the organization rather than general industry practice. Its revision history dates the development and, where the analyst's name appears as author or reviewer, ties her to it.
Around that document sit the supporting layers: training materials she delivers to new staff with attendance records, client-onboarding reports that show her applying the workflow to real accounts, an organization chart comparing her knowledge with that of other employees, and a detailed company statement explaining the nature of the specialized knowledge and why the U.S. assignment needs it. Payroll records prove the year abroad; corporate documents prove the affiliate relationship.
Exclude confidential client data, but do not redact the procedure so heavily that it becomes generic. Certified translations are required for French-language manuals.