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When not to use Design Patterns? Do not use design patterns in any of the following situations. • When the software being designed would not change with time. • When the requirements of the source code of the application are unique. If any of the above applies in the current software design, there is no need to apply design patterns in the current design and increase unnecessary complexity in the design. When to use Design Patterns? Design Patterns are particularly useful in one of the following scenarios. • When the software application would change in due course of time. • When the application contains source code that involves object creation and event notification. Benefits of Design Patterns: The following are some of the major advantages of using Design Patterns in software development. • Flexibility • Adaptability to change • Reusability What are Design Patterns? A Design Pattern essentially consists of a problem in a software design and a solutio