Software development technology has been continuously improving. When talking about software development methods one can simply not ignore the role which testing plays in software development. Therefore in order to maintain pace with latest software development technologies testing needs to be done faster than development. Imagine you are building a big Software-as-a-Service product like for example Salesforce. The product contains 1000 features. To keep up with the competition, you must also release a new feature each month. Imagine that you are required to test the product. You will need to verify that the new features are not affecting any of the existing features. All 1000. Imagine that you must test all 1000 of them within one week. What was the situation 'before-Agile? Waterfall Development Technology was an established software development method before Agile software Development. The Waterfall model is a method of developing software in a series, starting with designing, pl