List of Figures

2.1 Grid Layered Architecture
2.2 Grid Scheduling Hierarchy
3.1 Workflow Examples
3.2 The Workflow Reference Model
3.3 An Example Workflow Specification
4.1 AQF Application Workflow
5.1 GRACCE GUI Interface – Appdesc
5.2 A Workflow with Loops and Conditional Branches
6.1 The GRACCE Scheduling Architecture
6.2 Event Sequence in File Transfer
7.1 A 7-Task Workflow
7.2 Execution Time of the 7-Task Workflow
7.3 Execution Time Distribution of the 7-Task Workflow
7.4 Performance Improvement Distribution of the 7-Task Workflow
7.5 A 20-Task Workflow
7.6 Execution Time of the 20-Task Workflow
7.7 Execution Time Distribution of the 20-Task Workflow
7.8 Performance Improvement Distribution of the 20-Task Workflow
7.9 Queue Waiting Time Summary
7.10 The Distribution of Performance Improvement