Development AntiPattern: Poltergeists

• Proliferation of classes [Riel 96]

• Spurious classes and associations

  • Stateless, short-lifecycle classes
  • Classes with few responsibilities
  • Transient associations

• Excessive complexity

• Unstable analysis and design models

• Analysis paralysis

• Divergent design and implementation

• Poor system performance

• Lack of system extensibility

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