Dear Friends,

One of our customer question our PCBA WIP management procedure since he saw some of SMT / PTH subassemblies boards were keeping in production area longer than 3 days,

Some of the boards are longer than one weeks and even a few pcs longer than 1 month, so we had a big discussion about the shelf life of the assembly boards but end of our discussion

It seems he was not convinced, hereby I need your help to let know is there any IPC standards to describe this rule?  

Thanks & Regards

James Lee