Don’t Allow User to start Build Plate Flag Operations 1. Validate if Operations is flag as Powder Operation MES – Validation Business Logic If Operations is flag as Build Plate Operation. Don’t Allow user to start this operation unless prior operations are completed. Example Operations 10 – Initial Parts 20 – Validate Mtl 30 – Clean Part 40 – Paint [Powder Flag] 50 – Final Operations If Operations 10 to 30 are not completed, user cannot start operations 40.