What is Primavera P3?

Primavera P3 (also known as Primavera Project Planner) was a project management software application, originally developed by Primavera Systems, Inc. It was primarily used for planning, scheduling, and controlling complex projects, particularly in the construction, engineering, and manufacturing industries. It allowed users to define project activities, assign resources, track progress, and analyze project performance. While superseded by later Primavera products like P6, P3 was widely adopted and remained in use for many years.