# Factory Method Design Pattern ## When to use it? Use the Factory Method when :ledger: you don’t know beforehand the exact types and dependencies of the objects your code should work with. :ledger: you want to save system resources by reusing existing objects instead of rebuilding them each time. :ledger: you want to provide users of your library or framework with a way to extend its internal components. ## Pros & Cons :green\_circle: You avoid tight coupling between the creator and the concrete products. :green\_circle: *Single Responsibility Principle*. You can move the product creation code into one place in the program, making the code easier to support. :green\_circle: *Open/Closed Principle*. You can introduce new types of products into the program without breaking the existing client code. :red\_circle: The code may become more complicated since you need to introduce a lot of new subclasses to implement the pattern. The best-case scenario is when you’re introducing the pattern into an existing hierarchy of creator classes.
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