Check if the flexibility Chart defines for each operator the qualification status.Check if the flexibility Chart defines for each work station the target of qualified people, it means the number of operators needed to be trained to avoid risk of absenteeism and turn over.Check if the target for qualification defined in the flexibility Chart is Ok. In case of deviation, action plan must be followed.Look for a job rotation plan or log. How often does the team rotate?The number of Team Members certified per station should support the Job Rotation Plan.