Cohesion and coupling metrics for workflow process design

Dec 14, 2010

Workgroup and Workflow Management Systems - Title of Presentation1

Cohesion and Coupling Metrics for Workflow

Process Design

Polo Regionale di Como of the Politecnico di Milano

Workgroup and Workflow Management Systems

Giorgio [email protected]

- presentation given on December 20th, 2010 -

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In search of a metric

Number(s) to measure the “quality” of a workflow schema

RobustnessClarity

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Let's start from a class

public class Car

{

private Engine engine;

private Wheel[] wheels;

private Tire[] tires;

private Person driver;

}

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Cohesion

engine wheels tires driver

accelerate() x x

brake() x x

checkUp() x x x

ignite() x x

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Coupling

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From programs to workflows

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Information elements structure

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Partitioning into activities

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Mathematical treatment

Set D of information elements

Operations O = {(p, cs) ∈ D × P(D)}

Activities A ⊆ O

W = {A1, A2, A3, …} (partition)

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Metrics definition (1/3)

Relation cohesion

Information cohesion

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Activity cohesion

Workflow cohesion

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Coupling

Coupling/cohesion ratio

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Final results

An objective metric to compare different designs

Limitations: resource allocation, timing

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References

[1] W. Stevens, G. Myers, L. Constantine, "Structured Design", IBM Systems Journal

[2] Reijers, H.A., and Vanderfeesten, I.T.P. Cohesion and Coupling Metrics for Workflow Process Design.

Dec 14, 2010


Thanks for your time

Cohesion and coupling metrics for workflow process design

Technology

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