Introduction to Information and Computer Science Information Systems Lecture c This material (Comp4_Unit9c) was developed by OHSU, funded by the Department of Health and Human Services, Office of the National Coordinator for Health Information Technology under Award Number IU24OC

Information Systems Learning Objectives Define an information system, how one is used and list examples. (Lecture a) Describe the components of an information system. (Lecture a) Describe the process for developing an information. (Lecture b) Describe the different types of testing and when testing should occur. (Lecture c) Describe how information systems are supported and maintained over time. (Lecture c) Describe specialized information systems. (Lecture d) Explain how information systems are used in healthcare. (Lecture d) 2 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

System Testing and Evaluation Occurs throughout development process Evaluation –Requirements –Designs –Implementation Includes software and system testing 3 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

Testing Overview Create the Test Plan Determine Test Cases and Test Data Execute Tests –Test Environment –Automate Tests Fix Bugs and Retest Repeat as Necessary 4 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

Test Plan Testing goals Key areas of focus Testing deliverables How tests will run List of items to test Roles and responsibilities Prerequisites Environment Assumptions What to do when test is successful What to do when test fails Glossary of terms 5 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

Test Cases Test cases are written to: –Cover all use cases and scenarios –Validate technical requirements and specifications –Verify the application/system meets the business and functional requirements specified –Verify the system meets performance standards Formal and Informal Test Cases Scenario testing 6 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

Contents of Test Cases Test Case ID Test Case Description: –What to test –How to test Input Data Expected Result Actual Result Pass? or Fail? Additional information may also be captured: –Test Suite Name –Test Category –Tested By –Test Date –Test Iteration 7 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

Testing Sequence Unit testing Integration testing System testing System integration testing User acceptance testing 8 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

Testing for Users Usability Accessibility –Americans with Disabilities –Section 508 of the Rehabilitation Act –Web Accessibility Initiative 9 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

Testing Types (1 of 2) Load Stress Maintenance Ad Hoc Exploratory Installation 10 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

Testing Types (2 of 2) Recovery Reliability Regression Sanity Scalability Security Smoke Volume 11 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

System Performance Testing Performance and Measurement –Response time –Bandwidth –Throughput –Turnaround Capacity Planning 12 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

Systems Support & Security Managing systems support and security: –User Support –Systems Maintenance –System Security –Physical Security –Backup and Recovery –System Obsolescence 13 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

User Support User training Minimize productivity losses Help users do their jobs faster/ better Help desk Show how to use system resources Answer questions Teach Contact point 14 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

Systems Maintenance Updates to a current system Includes –Hardware updates –Software updates –Security updates –System repairs Responds to users' needs 15 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

Maintenance Tasks Corrective Adaptive Perfective Preventive 16 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

System Security CIA model –Confidentiality –Integrity –Availability 17 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

System Security Physical security Operations center security Servers, desktop computers, notebook, laptop and tablet computers Network security Application security File security User security Procedural security 18 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

Backup and Recovery Backup Policies –Types of backups –Backup media –Retention periods Recovery issues –Disaster recovery plan –Business Continuity Plan (BCP) 19 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

System Obsolescence No longer supports users needs Becomes out-dated Economically no longer useful 20 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

Information Systems Summary – Lecture c Systems testing occurs during each phase of systems development Testing occurs at the unit level and at the system level Systems support and security ensures that the system performs as it should once its been implemented 21 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c

Information Systems References – Lecture c References Evans, A., Martin, K., & Poatsey, M. (2010). Technology in Action: Complete (7th ed.). New York: Prentice Hall. ISO/AWI TR (1997). Retrieved Nov 26, 2011, from International Organization for Standardization: Kay, R. (2002, May 14). Quick Study: System Development Life Cycle. Retrieved 11 23, 2011, from Computerworld: Parsons, J., & Oja, D. (2010). New Perspectives on Computer Concepts 2011: Comprehensive (13th ed.). Boston: Course Technology. Perrin, C. (2008, June 30). HIT Security - The CIA Triad. Retrieved December 22, 2011, from TechRepublic website: Shelley, G., & Rosenblatt, H. (2010). Systems Analysis and Design (8th ed.). Boston: Course Technology. Shelley, G., & Vermaat, M. (2010). Discovering Computers 2011: Introductory. (1st ed.). Boston: Course Technology. Software Testing. (2011, Nov 23). Retrieved Nov 26, 2011, from Wikipedia: Stair, R., & Reynolds, G. (2010). Fundamentals of Information Systems (5th ed.). Boston: Course Technology. System Testing. (2011, Jun 7). Retrieved Nov 26, 2011, from Wikipedia: Systems Development Life Cycle. (2011, Nov 22). Retrieved Nov 23, 2011, from Wikipedia: What is Systems Maintenance. (2011, Aug 26). Retrieved Nov 26, 2011, from WiseGeek: Whitten, J., & Bentley, L. (2007). Systems Analysis and Design Methods (7th ed.). McGraw-Hill. 22 Health IT Workforce Curriculum Version 3.0/Spring 2012 Introduction to Information and Computer Science Information Systems Lecture c