How to plan test time [closed]

Question

Say suppose 10 developers have taken 6 months to develop some application. As a project manager how much time should I spare in my plans for testing?

6 months of effort includes unit testing. I am specific about functional test and user acceptance test.

Is there any ratio or relationship between development time and testing time?

Answer 1

Here is a short article from Alan Page, Test Architect on Microsoft's Engineering Excellence team :

Some examples of things to consider in test estimation are:

• Historical data - At the very least, you can estimate test design based on previous projects
• Complexity - Complexity relates directly to testability. Simple applications can be tested more quickly than complex programs
• Business goals - Is the application a prototype or demonstration application? Or, is it flight control software for a spaceship? The business goals influence the breadth and depth of the testing effort
• Conformance / Compliance - If the application must conform to a standard, these requirements must be considered when estimating the testing task.