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As an organisation, you need to know how to manage performance throughout the software life cycle, as well as lower total cost of ownership of the software that your organisation creates.
As an architect, you need to balance performance and scalability with other quality-of-service (QoS) attributes such as manageability, interoperability, security, and maintainability.
As a developer, you need to know where to start, how to proceed, and when you have optimised your software enough.
As a tester, you need to validate whether the application supports expected workloads.
As an administrator, you need to know when an application no longer meets its service level agreements, and you need to be able to create effective growth plans.



	Why is Application Performance Engineering important?
	Whether you design, build, test, maintain, or manage applications, you need to consider performance implications. If your software does not meet its performance objectives, your application is unlikely to be a success. If you do not know your performance objectives, it is unlikely that you will meet them.
	As an organisation, you need to know how to manage performance throughout the software life cycle, as well as lower total cost of ownership of the software that your organisation creates. As an architect, you need to balance performance and scalability with other quality-of-service (QoS) attributes such as manageability, interoperability, security, and maintainability. As a developer, you need to know where to start, how to proceed, and when you have optimised your software enough. As a tester, you need to validate whether the application supports expected workloads. As an administrator, you need to know when an application no longer meets its service level agreements, and you need to be able to create effective growth plans.