IBM® Rational® ClearQuest® is application lifecycle management (ALM) software that provides flexible change and defect tracking, customizable processes, real-time reporting and lifecycle traceability for better visibility and control of the software development lifecycle. This solution provides scalable, multiplatform support to any size organization, so you can continue to use your customized processes as your organization’s needs evolve. Rational ClearQuest supports the IBM AIX®, HP-UX, Linux®, Sun Solaris and Microsoft® Windows® operating systems.