tokens: The customer shall specify minimum RDMs ( MRDMs ) for the various radiation effects . NOTE 1 The customer and supplier can agree to other margins to reflect conducted testing ( e.g. supplier - performed lot acceptance tests , published tests on similar components ) in specific cases and in accordance with the hardness assurance programme defined according to ECSS - Q - ST-60 . These minimum RDMs can be established directly by the customer , or based on a proposal made by the supplier and approved by the customer . NOTE 2 The margins for SEE are based on the consideration of acceptable risks and rates and are therefore involve system level considerations .