Performance indicator evaluation for a cloud computing system from QoS viewpoint

Yi-Kuei Lin*, Ping Chen Chang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


With the development of information technology, the cloud computing system (CCS) has become a new paradigm for the business and clients. The system supervisor has to guarantee the CCS keeps a good quality of service (QoS) to satisfy the clients' requirements. The maintenance action is thus necessary when the CCS falls to a specific state such that it cannot afford enough capacity to meet demand d. In order to measure the service level of a CCS, this paper constructs a network model and proposes a key performance indicator (KPI), where the KPI is utilized to evaluate the probability that the demand can be satisfied under both transmission time and maintenance budget constraints. A method to derive the interval estimation for the KPI is developed. The system supervisor can conduct the sensitive analysis to improve/investigate the most important part in a large CCS afterwards.

Original languageEnglish
Pages (from-to)1605-1616
Number of pages12
JournalQuality and Quantity
Issue number3
StatePublished - 1 Jan 2013


  • Cloud computing system (CCS)
  • Interval estimation
  • Key performance indicator (KPI)
  • Maintenance budget
  • Quality of service (QoS)

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