Get ISO 10012 is the ISO standard is meant to satisfy the measurement management system requirements. This certification is something that you need to prove to your customers that whatever you are measuring is the right one.
The ISO 10012:2003 certification is something that is not necessary, but something that most wide business opts for. The purpose of this certification is to satisfy the measurements management systems for further certifications.
Therefore, if you want to gather the trust of your customers regarding your measurements, this is the certification that you are looking for.