Define a release phase You can define a phase from the Release form. Release Phases use the same fields as other Planned Tasks in the Planned Task plug-in From the Release form, use the Release Phases related list. . Release Phases are not used with the SDLC and SDLC - Scrum plug-ins. With SDLC - Scrum, phases are replaced by Sprints, which use the same fields as other Planned Tasks.