4.2.4The process flow chart shall indicate the checkpoints of CtQ and CIS throughoutthe whole production process.It shall,at a minimum,includes:a)Checkpoints related to safety issue;b)Checkpoints of critical dimensions as per specification;c)Checkpoints of specific functions as per Test Plan;d)Checkpoints of related abuse tests.f)The sampling plan,sample size,inspection pattern and acceplance criteriafor each checkpoint.