Thing three:

• Availability

  • There is a timely response to our requests
  • There is a fair allocation of resources (no starvation)
  • Reliability (software and hardware failures lead to graceful cessation of services and not an abrupt crash)
  • Service can be used easily and in the manner it was intended to be used.
  • Controlled concurrency, support for simultaneous access with proper deadlock and access management.