According to Jim McCall's model, there are quality factors that are important for any application. Reliability and Testability are two of the quality factors. Reliability is the system's ability not to fail. Testability is the ease of testing a system to ensure that it is error-free and meets its specification. According to the patterns below, assign each pattern to which of the two quality factors (Reliability and Testability) it improves:

Creational Pattern - Singelton

Creational Pattern - Factory Method

Creational Pattern - Abstract Factory

Creational Pattern - Prototype

Structural Pattern - adapter

Structural Pattern - Bridge

Structural Pattern - Decorator

Structural Pattern - Facade

Structural Pattern - Flyweight

Structural Pattern - Proxy

Behavioural Pattern - Chain of Responsibility

Behavioural Pattern - Command

Behavioural Pattern - Mediator

Behavioural Pattern - Memento

Behavioural Pattern - Observer

Behavioural Pattern - State

Behavioural Pattern - Strategy

Behavioural Pattern - Template Method