Following all necessary Type A and Type B evaluations, all data must be combined to produce a summary of the overall uncertainty of the procedure. This is termed the uncertainty budget. The presentation of the uncertainty budget will vary depending on the process employed for analysis but nevertheless it must be present.
Irrespective of the method employed all MU determinations must contain the determination of standard uncertainties of individual contributors and a means by which they are combined. This combined uncertainty is then expanded using a coverage factor to define the MU final result.