The concept is still in development. Acceptance of SDoC may require that a manufacturer's lab be accredited. Whether or not accreditation is required depends on the customer. Accreditation should not be mandatory. Labs have found that mutual recognition agreements among accreditors are not working effectively.
Education is needed to provide an understanding of the significance of accreditation.
We must see how they work. As a lab owner, I have seen the benefit of SDoC, but the European Union seems to demand more enforcement. A lot of work needs to be done on market surveillance before we can proceed to wide use of SDoC. Market surveillance is effective, but the source of surveillance depends on market needs and the sector involved. This is a work in progress. If there are only a few certification bodies, then peer review is sufficient.