Research Article

Trusted QoS Assurance Approach for Composite Service

Algorithm 1

ā€‰Input:
(1)Flowchart
(2)The flowchart contains m tasks, denoted as .
(3)Each task has service with the same function to complete the task, denoted as .
(4)Each atomic service has three QoS properties: T (real time), A (availability), and C (cost). Each atomic service has its own real-time interval and estimated execution time .
(5)Each service would have real-time requirements and availability requirements after QoS planning, .