The application lifecycle goes well beyond simply writing applications and testing them. It includes everything from the initial collection of the business requirements, through design and prototyping, development, release, and ongoing maintenance. A process for controlling this is called Application Lifecycle Management, or ALM.
Agile Business Suite (now AB Suite®) is application development technology from Unisys that helps to address the entire application lifecycle. AB Suite, which works as a package in Microsoft Visual Studio, is also well placed to help you take advantage of tools, processes and methodologies that have been developed for Application Lifecycle Management using Visual Studio Team Foundation Server from Microsoft.