A research-based breakdown of Oracle Primavera P6 - the tool behind the world's largest construction and infrastructure projects If MS Project is the workhorse of mid-size construction scheduling, Primavera P6 is the machine they bring in when the stakes are too high to get wrong. Highways, airports, oil refineries, nuclear plants, major rail corridors - P6 is the scheduling backbone on projects where a single day of delay can cost hundreds of thousands of dollars in liquidat