Samenvatting Information Systems 2023

INFORMATION
SYSTEMS




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,CONTENT
1 ANALYSING THE INFORMATION SYSTEM REQUIREMENTS FOR BUSINESS PROCESSES.................................. 3
1.1 SESSION 1........................................................................................................................................... 3
1.2 SESSION 2......................................................................................................................................... 12
2 CHAPTER 2: DESIGNING THE CONCEPTUAL MODEL OF THE INFORMATION SYSTEM .................................. 24
3 CHAPTER 3: DESIGNING AND IMPLEMENTING THE INFORMATION SYSTEM ............................................... 47
3.1 SESSION 1......................................................................................................................................... 47
3.2 SESSION 2......................................................................................................................................... 66
4 CHAPTER 4: USING THE INFORMATION SYSTEM ........................................................................................ 74




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,1 ANALYSING THE INFORMATION SYSTEM REQUIREMENTS FOR
BUSINESS PROCESSES
1.1 SESSION 1
1. Context
1.1. Information System (IS) Development
Problem domain:
• Done by business people
• What is the system supposed to do?
• Good understanding of the requirements of the system is essential!
Solution space:
• Done by IT-specialists
• How will the system be build?
• If the answer to the “what” question is not clear, the solution will be a failure (“how” question)
Cycle:

• System design: architecture
• System implementation: coding & programming and
testing (user acceptance testing)
• System use and maintenance: long phase
If the systems are aging → new systems → same process →
cycle



Requirements of system analysis:

1) Systems objectives: strategic plan (why?)
2) System functions: what should the system exactly do?
3) Information needs
4) Data needs: what is the data that we need?




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, 1.2. Business Process Management (BPM)
When is sales order fulfilment efficient?
• Timely product delivery
• At low costs
• With no/few mistakes
• Satisfying customer needs
The devil’s quadrangle (4 dimensions)

• Find a good balance to improve efficiency!
• Low costs and time and high quality
→ Standardized processes
→ Lower flexibility
BPM

1) What?
• Body of methods, techniques and tools to discover, analyze, redesign, execute and monitor business
processes
2) Why?
• Continuously assure and improve the efficiency of business processes (ecological and social
importance)
3) How?
• Process automation: Use IT-based systems to support process execution and monitoring
• Process governance, innovation, analytics, change management


BPM lifecycle
Goal? Continuous improve business processes
1) Process identification: what are our business processes?
• Overview of the processes and relationships
between the processes
• Process architecture: problems should be
feasible
• Strategic importance
2) Process discovery:
• Modelling and observing
• As-is process model = the existing model that
is used
3) Process analysis
• Insights on weaknesses and their impact
• Think about possible solutions
4) Process redesign
• Integrate solutions in the model
• To-be process model = the new model that
will be used
5) Process implementation
• Executable process model
6) Process monitoring
• Get data
• Conformance and performance insights
• Check whether the process is executed the way you modelled it
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