1. Group 3: Johannes Bönner, Luka Hale, Paul Knulst Christian Knutz, Tim Janssen Verificationand Validation

2. Do youhaveanyQuestions? Pleaseaskthem after thepresentation!

3. Content Definition of validation and verification Structure of a test plan How to plan V&V Methods of V&V Why is V&V essential in software engineering Questions

4. We need verification and validation to… …ensurethatthesoftwaresystemmeetstherequirementsofthecustomer … ensurethatthesystemsperformanceisacceptable … find errorsandbugs in thesystembeforeitisdeliveredtothecustomer

6. Doesthesystemmeetthefunctionaland non functionalrequirements?

8. Howto plan V&V? V-Model Desingingtestsforeverystageofthesoftwaredevelopement Execute thetests in reverse order Didwedevelopthesystemaswewantedto?

9. Methodstoverifyandvalidatesoftwaresystems White-Box-Testing (Integration tests) The testerasaccsesstothesourcecode The testerhasknowledgeoftheinnerfunctionalityofthesystem Advantages: Low costs Support bydevelopingtools (like Unit-Test creation in Netbeans) Disantvantages: Nosystemrequirementsaretestes Workflow errorscouldstayundetected

10. Methodstoverifyandvalidatesoftwaresystems Black-Box-Testing (Delivery-Tests) The testerhasnoaccsesstothesourcecode The testerhasnoknowledgeoftheinnerfunctionalityofthe System Advantages: Tests ifthesystemmeetsthegivenrequirements Tests the hole system in workflowsituations Disadvantages: High costs Novisibleresultslikeerrormessagesorthrownexceptions

11. Methodstoverifyandvalidatesoftwaresystems Software inspection Goal: identifyingdefects ImportantRoles: Author Moderator Inspector Reader Recorder

12. Methodstoverifyandvalidatesoftwaresystems Automatedstaticanalysis Code will not beexecuted Helpsto find: Unreachablesourcecode Variables whichare not inizializied Missingoverridestatements Weknowthisbecauseofpluginslike checkstyle

13. Whyis V&V so essential in sofwareengineering? Makesitpossibleto find erroswhiledevelopingsoftware Ensurethatthesoftwaremeetstheexpectationsofthecustomer Ensurethat all functionsconformtotherequirements

14. Howare V&V linkedtosoftwaredevelopementprocesses? The developmentprocessand V&V arelinkedheavilybecause: Itmakesiteasiertomeetthereqiurements Ithelpstoreducecostsoftesting Ithelpstoimprovethesoftwarequality A goodexampleforthislinkingisthe V-Model wedescribedearlier

15. Never testtobesurethatthesoftwarehasnodefects!!!Becausethatis just impossible

16. Questions???