юбилей(Russia is approaching a grim milestone: by mid-January, President Vladimir Putin’s “special military operation” in Ukraine will have dragged on longer than the war on the Eastern Front that began with the German invasion of the Soviet Union in June 1941 and ended with the fall of Berlin in May 1945.cnn.comART Vancouver)
промежуточный платёж(Should any improvement result in additional requirements for which milestones have already been paid, no additional milstone payments will be incurred. I. Havkin)
веха(A point on the project schedule at which the project team assesses progress and quality, and reviews deviations in scope and specifications. A project may have many interim milestones for internal use only, which signal a transition within a phase and help divide large projects into workable pieces. External milestones or major milestones typically occur at the end of major phases of work and are associated with the completion of major deliverables. External milestones are the points where the team and customer review work to date and agree to proceed with the project, appear as a task with a duration of zero work units, and are exposed on customer reports)
A terminal element that marks the completion of a work package or phase(Typically marked by a high-level event such as project completion, receipt, endorsement or signing of a previously-defined deliverable or a high-level review meeting at which the appropriate level of project completion is determined and agreed to. A milestone is associated with a decision that outlines the future of a project and, for an outsourced project, may have a payment to the contractor associated with it)
cnn.com ART Vancouver)