he layout of the manufacturing and support operations must account for efficient material, personnel, and equipment flow patterns. Adequate access control is required to restrictentrance to manufacturing areas. The most efficient and compliant flow pattern is the onethat provides for unidirectional flow.This methodology minimizes backtracking and thusthe potential for cross-contamination and mix-ups during all manufacturing and support (cleaning) operations.The separation of visitor and employee entrances to the manufacturing building should be considered.Visitor entrances to the manufacturing and support areas should be minimized and restricted to a single point.