Process verification and validation
9 important questions on Process verification and validation
Where does process verification and validation take place in the BPM lifecycle?
What are the three dimensions of quality and the accompanying techniques?
- Semantic quality: technique is validation
- Pragmatic quality: technique is certification
- Syntactic quality: technique is verification
What are the errors in this picture? Explain.
2. Lack of synchronization: the XOR-join won't wait for the second action. It will end up with two tokens.
3. Potential lack of synchronization (would be potential deadlock with AND-join)
4. Livelock: you keep repeating something without being able to finish or continue
Another example: Control flow error: control flow goes across the border of pool.
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What are the three requirements for soundness?
2. Proper completion: if place "end" is marked (so end place is reached) all other places are empty for a given case. If this does not complete: lack of synchronization
3. No dead transitions: it should be possible to execute an arbitrary activity by following the appropriate route through the Workflow net. A dead transition is neither fired or used at any combination.
Tell something about the quality according to the three requirements of soundness.
On what things will be checked for the semantic quality?
Completeness: is everything modeled? is nothing missing?
What is pragmatic quality? What will be checked?
How to formulate labels in a model?
- Events as object-passive-participle: message received
- Conditions with reference to object: amount bigger than 3000
What are the Seven Process Modelling Guidelines (7PMG)?
G2. Minimize the routing paths per element
G3. Use one start and one end event
G4. Model as structured as possible
G5. Avoid OR routing elements
G6. Use verb-object activity labels
G7. Decompose a model with more than 50 elements
Note: teacher sometimes uses 30 elements
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