One major indicator of the quality of postal services is delivery times. Letters and packages should be delivered promptly to the addressee. The delivery time is measured as the time it takes for a letter or parcel to arrive at the intended address from the time it is handed in at a post office. The Postal Services Ordinance states that 97% of letters sent by A- and B-post inland must arrive on time; for parcels sent inland, the figure must be 95%.

PostCom approves the methods and instruments used to record delivery times, observing international quality standards and taking into account current technology.