SBU relates to the business
SBU concerns the firm's certification; SKK relates to individual competence, and the two are complementary rather than interchangeable.
SKK relates to personnel competence
Check the firm's classes, personnel roles and credential scope against project eligibility rules.
Check the connection
A common mistake is assuming that one worker certificate satisfies every company-level construction requirement.
General guide; verify current requirements with competent authorities before relying on it.

