1 Vrije Universiteit Faculty of Sciences Department of Computer Science Section Information Management & Software Engineering Subsection Human Computer Interaction, Multimedia & Culture Johan F. Hoorn and Gerrit C. van der Veer Requirements Analysis and Task Design in Dynamic Environments HCI International 2003Heraklion, Crete, Greece

2 Contents  Problem  Aim  Theory  Model  Prospects  Questions Dutch Ministry of Economic Affairs

3 Problem Business models change in reaction to the outside world Therefore, business goals and work processes change IT systems become outdated even before release This costs time, money, effort, and anger

4 Public service? Serves general public No break even Commercial? Serves itself Beyond break even Business model Government demand changes Slow work process allowed Work process must be fast Supporting IT can leave much to the user Supporting IT is not allowed to leave much to the user

5 Supporting IT can leave much to the user Supporting IT is not allowed to leave much to the user Public serviceCommercial Make new incidentFill out 8 action windowsEach action a new window Make 4 different files 

6 Supporting IT is not allowed to leave much to the user Public serviceCommercial Minimal number of complex windows is 12 Takes at least 30 minutes Error probability high Does not support the public Not cost extensive Expensive redesign

7 Aim  Can we make up a system structure that can handle changes in business goals and work processes? To this end we need to isolate the factors that remain stable throughout the process of change

8 Examples of goals Personal concerns Group concerns Get an exciting jobHelp juvenile delinquents

9 Examples of processes Speed Accuracy

10 Theory Evolving business models cause shifts in personal and business goals They also affect the speed of work processes and thus, (human) accuracy All this explains the changes in system requirements

11 Business goals: - break even / make profitegotistic - to serve and protectaltruistic Personal goals: - make a careeregotistic - commitment to companyaltruistic Where, then, can we find the stable factors? New business model changes priorities

12 Client Sources of conflict, regarding goals Business goalsPersonal goals Changing system requirements Stakeholders ManagementWorkfloor egotistic vs. altruistic egotistic vs. altruistic vs. Event

13 Accurate processes: - getting an e-dossierfast - breath analysisslow Inaccurate processes: - summary justicefast - incident administrationslow Stable process mechanisms Help me! New business model changes priorities

14 Client Sources of conflict, regarding processes Accurate processInaccurate process Changing system requirements Stakeholders ManagementWorkfloor speed vs. accuracy speed vs. accuracy vs. Event

15 Agreed requirements change’ Break evenServe, protectCareerCommitmentE-dossierBreath analysisSummary justiceIncident adm. egotistic altruistic business personalinaccurate accurate fast slow Relevance Process Goals Valence Model

16 Prospects  Adaptive system structure?  Ethnography  Structured questionnaires  Confirmative factor analysis  Model fit

17 Questions?