The document describes a Quality of Service (QOS) product for critical messaging with two offerings: 1) Immediate Delivery guarantees 80% of SMS delivered within 30 or 60 seconds, with compensation for delays. 2) Assured Delivery guarantees 90% of SMS delivered, with compensation for lower delivery rates. Exceptions apply for message speeds over 15 messages per second, invalid subscribers, and other operator issues. The product prioritizes critical messages on a separate "expressway" to avoid delays.

1. Quality at its Best