1. Distributed Aircraft Maintenance Environment - DAME DAME Workflow Advisor Max Ong University of Sheffield

2. Distributed Aircraft Maintenance Environment - DAME Straightforward Workflow Process with known transformations Complex Workflow Processes with multiple transformations to be searched with CBR techniques Workflow Process & Transformations

3. Distributed Aircraft Maintenance Environment - DAME Workflow Advice Scenario Describe Workflow Cases Discover Workflow Cases IntegrateSolution A maintenance engineer in Singapore wants to connect and use relevant tools and resources but would like advice. Aero engine experts in an organisation perform complex diagnostic tasks, each task involving combinations of computing resources, analysis tools, services and data. DAME automatic workflow system needs to use available knowledge and resources to process a task. Easier aggregation Smarter Knowledge- based Search Information Capture

4. Distributed Aircraft Maintenance Environment - DAME Objectives of DAME Workflow Advisor Provide advice on how to construct complex workflows using available tools and resources to complete a desired task Combine captured workflow knowledge with knowledge-based search across complex workflow information DAME Workflow Advisor

5. Distributed Aircraft Maintenance Environment - DAME DAME Workflow Advisor 1. Various compute resources and services available in Grid environment 2. Workflows are executed within DAME system across the Grid 3. Workflow history continuously updated during use of DAME system 4. Workflow Advisor performs knowledge-based search across workflow history 5. Most suitable workflows are presented 6. Recommended workflows may be automatically executed via workflow scripts Re-initiate search at each stage of the task to increase overall accuracy Common set of functions (API) supported by services and workflow system Workflow Advisor itself implemented as Grid Service Incorporates Cased-Based Reasoning technology Flexible Workflow Advisory system - applicable to variety of domains

6. Distributed Aircraft Maintenance Environment - DAME Workflow Scripts Service Instances Workflow Instances Workflow Definition (BPEL) Creates and executes workflow Workflow Advisor Workflow Manager Provenance Data DAME Workflow Advisor Workflow Advisor interaction with DAME workflow and provenance components DAME Diagnostic Workbench DAME Users Automated workflow advisory Direct workflow advisory

7. Distributed Aircraft Maintenance Environment - DAME DAME Workflow Advisor Work in progress Technical document to scope initial requirements and design Survey of Grid workflow practices Available services orchestration tools (BPEL) Approach to workflow advisory (knowledge-based & semantic) How Grid technology enables Workflow Advisory – protocols, services and collaborative environment Development of Case-Based Reasoning engine