% of letters (fastest service) delivered on-time: provides an estimate of the quality of the postal service provided by the USP related to transit times in (D + n) when D represents the date of deposit, and n represents the number of working days which elapse between the date of deposit (D) and the date of delivery to the addressee. The indicator gives the percentage of letters delivered on time according to the national performance indicator.Domestic service :% of letters delivered by D+1 (working days)International service :% of items delivered by D+3 (working days) or% of items delivered by D+5 (working days)For more information see here
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